METHOD OF IN-SITU MEASUREMENT OF THERMAL INSULATION PERFORMANCE OF BUILDING ELEMENTS USING INFRARED CAMERA
|
|
- Tabitha Phelps
- 5 years ago
- Views:
Transcription
1 METHOD OF IN-SITU MEASUREMENT OF THERMAL INSULATION PERFORMANCE OF BUILDING ELEMENTS USING INFRARED CAMERA Shinsuke Kato 1, Katsuichi Kuroki 2, and Shinji Hagihara 2 1 Institute of Industrial Science, University of Tokyo, Meguro-ku, Japan 2 Japan Testing Center for Construction Materials, Souka-shi, Japan ABSTRACT Specific and effective measures for international issues, such as prevention of global warming, energy saving, reduction of environmental loads, are urgently required. The improvement of the insulation efficiency of the house and the building is demanded as the part. For that purpose, it is also necessary to determine whether installed insulating materials have been installed properly, and whether they can actually demonstrate the expected performance. On the basis of the results of various surveys, the infrared method was proposed as nondestructive in-site measuring method enabling simple measurements on site. Laboratory experiments and a verification experiment using an actual building at the site were performed for a method of measuring the thermal insulation performance of building elements in actual large structures by the infrared method (Hagihara et al and 2007, Nakamura et al. 2006). The results confirmed that measurement accuracy can be sufficiently guaranteed. KEYWORDS Thermal Insulation, In-Situ Measurement, Detached House, Coefficient of Heat Transfer Sensor, Infra-Red Photograph INTRODUCTION Purpose In measurement of the thermal insulation performance of building elements such as walls, etc. in actual large buildings, simple, high accuracy measurement is quite difficult due to variable factors such as diurnal changes in air temperature, heat due to sunlight, and the like. Therefore, recently, a comparatively simple technique for obtaining the thermal insulation performance of building elements has been proposed by measuring the indoor-side surface temperature and the surface coefficient of heat transfer of the surface of building elements using an infrared camera, taking advantage of the high temperature measurement accuracy and improved functions of these devices. MEASUREMENT PRINCIPLE Heat transfer at the inside surface of a wall which is in contact with the outside air during a heating period can be expressed by the following equation, considering convection and radiation. q ( Ta Ts ) + r ( Tr Ts ) = c α α (1) where, q : Heat flux from interior (W/m 2 ) α c : Convective surface coefficient of heat transfer (W/(m 2 K)) α r : Radiant surface coefficient of heat transfer (W/(m 2 K)) Corresponding Author: Tel: , Fax: address: kato@iis.u-tokyo.ac.jp
2 Eq. (1) can be rearranged as follows: T a : Indoor air temperature ( ) T s : Wall surface temperature ( ) T r : Average temperature of radiation from indoor surfaces other than walls ( ) q ( α c α r ) α c Ta + α r Tr = Ts + α c + α r (2) Assuming Tn ( α c Ta + α r Tr ) ( αc + α r ) = /, α = α c + α r, Eq. (3) can be obtained from Eq. (2): ( Tn Ts ) q = α (3) where, α : Total surface coefficient of heat transfer (W/(m 2 K)) T n : Environment temperature ( ) T s : Wall surface temperature ( ) Accordingly, if α, T n, T s can be measured, it is possible to obtain q. In this case, T s is measured with an infrared camera, and α is measured with a device that serves as a surface coefficient of heat transfer sensor in the vicinity of the wall. Alternatively, α is measured with a heat flow meter, which is attached to the wall surface. T n is a fictive temperature, but in indoor environments, it is permissible to assume that substantially Ta =T r. Therefore, there is normally no problem if the air temperature T a is measured. However, strictly speaking, the radiant heat from indoor surfaces must be considered; hence, the globe temperature is used here. Alternatively, the temperature of a black curtain suspended in midair can be measured using the infrared camera, and this can be regarded as the approximate environment temperature. Because actual wall surfaces do not have a uniform temperature, but rather, display temperature variations, the heat flux from walls can be calculated by the following equation by obtaining a surface area where the temperature distribution is uniform. ( Tn Tsi ) Q = qi Ai = α Ai (4) where, Q : Heat flux from entire wall (W) q i : Heat flux from i part (W/m 2 ) A i : Area of i part (m 2 ) T si : Surface temperature of i part ( ) If the air temperature of the outside air can be measured, it is possible to obtain the coefficient of overall heat transmission of the wall by assuming a quasi-steady state. [( Tn Te ) A] U = Q / (5) where, U : Overall thermal transmittance (W/m 2 K) Q : Heat flux from entire wall (W) T n : Indoor environment temperature ( ) T e : Outdoor environment temperature ( ) A : Wall area (m 2 )
3 Wall A Outside Ts αc αr Ta Indoor side Tr Ts i Ai Fig. 1 Measurement principle STRUCTURE AND CALIBRATION OF SURFACE COEFFICIENT OF HEAT TRANSFER SENSOR Fig. 2 shows an outline of the surface coefficient of heat transfer sensor. In order to obtain a uniform temperature distribution, two copper sheets with a thickness of 0.5mm are used in the sensor. A heat flow meter with a thickness of 1mm is inserted between the two copper sheets and glued to the sheet on the surface side of the sensor. The copper sheet which forms the surface of the sensor has emissivity of 0.95 or higher in the long wavelength region, and is given a smooth finish free of roughness. A plane heater is mounted on the back side of the two copper sheets, and its back surface is insulated with extruded polystyrene foam having a thickness of approximately 25mm. As a standard, the size of the heat flow meter used is approximately 50mm 50mm. The sensitivity of the heat flow meter is 0.005mV/(W/m 2 ) or higher. Calibration of the surface coefficient of heat transfer sensor is shown in Fig. 3. Calibration was performed under the same conditions as with the heat flow meter attached to a heat sink. In measuring the heat transfer rate, measurements were performed assuming the between surface and air temperature difference to be approximately 4K. It was found that measurements are substantially independent of the direction of heat flow, regardless of whether the surface is heated or cooled.
4 insulation copper plate insulation copper plate plane heater heat flow meter (50 50mm) thermo couple Fig. 2 Outline of surface coefficient of heat transfer sensor heat condition (plane heater) 3 heat condition(heat sink) 2 cooling condition(heat sink) calculated value by reference document 1 analysis result Difference of temperature (K) Fig. 3 Results of calibration of surface coefficient of heat transfer (natural convection) Surface coefficient of heat transfer[w/(m 2 K)] EXPERIMENTAL STUDY Laboratory Verification Experiment Using Model Wall (Experimental Comparison with Hot Box Method) A model wall (wooden wall) was constructed, the overall thermal transmittance was measured in accordance with ISO 9890, and a comparative study with the infrared method was carried out. An outline of the test wall (dimensions: 1980 x 1980mm) is shown in Fig. 4. Construction of the glass wool thermal insulation was performed so as to intentionally create insulation defects (see Photo 1). A infrared thermograph of the wall with insulation defects is shown in Photo 2. As shown in Table 1, the overall thermal transmittance obtained by this method was 0.75W/(m 2 K). The surface coefficient of heat transfer obtained with the coefficient of heat transfer sensor at this time was 9.76W/(m 2 K) near the center of the test wall. The overall thermal transmittance when the same wall was measured in accordance with ISO 8990 was 0.78W/(m 2 K). Comparing the two, this shows good agreement with the overall thermal transmittance measured by the infrared method. The error with the standardized overall
5 thermal transmittance, adjusted to that in infrared thermograph measurement of the surface coefficient of heat transfer, is 3.8%. From this result, it can be concluded that the infrared method is an adequate measurement method from the viewpoint of accuracy. Outside Indoor side gypsum boards(9mm) siding glass wool (50mm) house wrapping sheets framing elevation cross-section Fig. 4 Wall model (wood-structure post-and-beam wall) Photo 1 Insulation work with intentional insulation defects Photo 2 Infrared thermograph of wall in Photo 1
6 Table 1 Results of measurement of overall thermal transmittance (laboratory experiment) Infrared Measurement method ISO 8990 method Heat transfer area A (m 2 ) Generated heat Q + = Q H QF (W) Calibrated heat Heat flow rate through test wall Environment air temperature in isothermal chamber Environment air temperature in hot box Environment air temperature in low temperature chamber Environment air temperature differential Thermal resistance Q Q l (W) N = Q Ql (W) * θ Ga ( ) θ Ha ( ) θ Ca ( ) θ = θ Ha -θ Ca (K) R θ A = (m 2 K)/W Q N Overall thermal transmittance Standardized overall thermal transmittance** Difference in overall thermal transmittance due to measurement method K = 1 W/(m 2 K) R K ' W/(m 2 K) (%) *: Heat flow rate calculated from the relationship between the surface temperature in infrared thermograph and the surface coefficient of heat transfer measured by the surface coefficient of heat transfer sensor. **:Overall thermal transmittance when the thermal resistance of the indoor-side surface(0.12(m 2 K)/W) in measurement in accordance with ISO 8990 is adjusted to thermal resistance of the indoor-side surface(0.10(m 2 K)/W) in measurement by the infrared method. Verification Experiment with Wall at Site (In-situ Measurement Experiment) The thermal insulation performance of a wall in an actual large residential building (north side wall not exposed to direct sunlight) was actually measured, and the effectiveness of this measurement method was verified. The cross section of the actual large wall is shown in Fig. 5. This is a conventional (Japanese-type) wood-structure post-and-beam building. As thermal insulation, the wall is filled with glass wool 75mm in thickness. Measurements were conducted over a period of 5 days. The measured values of surface temperature, air temperature, surface coefficient of heat transfer, etc. are averages of values measured at intervals of 10 minutes from midnight until 6:00 in the morning during the measurement period. An infrared thermograph of the surface temperature on the indoor side of the wall is shown in Fig. 6. The average surface coefficient of heat transfer during the measurement period was W/(m 2 K). The measured value of the overall thermal transmittance obtained from these results was W/(m 2 K). The total thermal transmittance (design value), considering the column parts and thermal insulation parts based on the composition of wall materials, was calculated as W/(m 2 K). Thus,
7 the two showed good agreement. Outside Indoor side measuring 測定対象 object Fig. 5 Cross section of wall (wood-structure post-and-beam construction method) AR Fig. 6 Infrared thermograph of wall surface temperature (square shows measurement range) Table 2 Results of measurement of overall thermal transmittance (in-situ measurement) Season Autumn Measurement period Nov. 2 7, 2006 Insulating material Thickness mm 75 Air temperature on outside 11.6 Air temperature on indoor side (globe temperature) 30.0 Average surface temperature of wall 29.4 Surface coefficient of heat transfer on indoor side 1) W/(m 2 K) Average overall thermal transmittance Measured value 2) Design value 3) K A' W/(m 2 K) K A W/(m 2 K) Difference ( K A' K A) / K A 100 (%) ) Result of measurements using surface coefficient of heat transfer sensor (average value of measured results from 0:00a.m. to 6:00a.m. during the measurement period). 2) Calculated using average values of measured results of temperature and surface coefficient of heat transfer from 0:00a.m. to 6:00a.m. during the measurement period. 3) Calculated value including general parts and heat bridge parts in object area of infrared thermograph.
8 CONCLUSIONS Laboratory experiments and a verification experiment using an actual building at the site were performed for a method of measuring the thermal insulation performance of building elements in actual large structures by the infrared method. The results confirmed that measurement accuracy can be sufficiently guaranteed. Using infrared camera, measurement is easy and, with this method, the thermal insulation performance of building elements can be quantified simultaneously with visual understanding of irregularities in the insulation construction. Therefore, infrared method is considered an effective measurement method. ACKNOWLEDGEMENTS This research is done as commission investigation of New Energy and Industrial Technology Development Organization (NEDO). REFERENCES 1. S. Hagihara, et al. (2006) In-Situ Measurements of Wall Thermal Performance Part 2 Method of Infra-Red Photograph [Constitution and Calibration of Surface Coefficient of Heat Transfer Sensor], AIJ Summaries of Technical Papers of Annual Meeting, C-2, Y. Nakamura, et al. (2006) In-Situ Measurements of Wall Thermal Performance Part 3 Method of Infra-Red Photograph [Experiment of Wall Model on Laboratory], AIJ Summaries of Technical Papers of Annual Meeting, C-2, S. Hagihara, et al. (2007) In-Situ Measurements of Wall Thermal Performance Part 5 Method of Infra-Red Photograph [In-Sutu Experimental Validation], AIJ Summaries of Technical Papers of Annual Meeting, C-2,.87-88
QIRT th International Conference on Quantitative InfraRed Thermography
10 th International Conference on Quantitative InfraRed Thermography July 27-30, 2010, Québec (Canada) Quantitative infrared wall inspection *CE Dept., Cracow University of Technology, Kraków, Poland,
More informationInitial study - draft
The department of Ecotechnology 2014-03-24 and Sustainable Building Engineering Itai Danielski Campus Östersund Tel: 063 165416 E post: itai.danielski@miun.se Measurements of heat transfer coefficient
More informationDetermining of Thermal Conductivity Coefficient of Pressed Straw (Name of test)
CONSTRUCTION HEAT PHYSICS LABORATORY INSTITUTE OF ARCHITECTURE AND CONSTRUCTION OF KAUNAS UNIVERSITY Test and calculation carried out according to: Product: 12 December 2012 LITHUANIAN NATIONAL ACCREDITATION
More informationHEAT FLOW SENSORS MF-180 MF-180M MF-190 MF-200 INSTRUCTION MANUAL
HEAT FLOW SENSORS MF-180 MF-180M MF-190 MF-200 INSTRUCTION MANUAL EKO Instruments Co., Ltd. 1. General outline EKO Heat Flow Sensors are suitable for the direct heat flow measurement of materials, and
More informationThermal characteristic evaluation system to evaluate. heat transfer characteristics of mounted materials
Technology Report Thermal characteristic evaluation system to evaluate heat transfer characteristics of mounted materials Takuya Hirata, Hirokazu Tanaka ESPEC CORP., Technology Development Division T he
More informationStandard Test Method for Measuring the Steady-State Thermal Transmittance of Fenestration Systems Using Hot Box Methods 1
Designation: 97 AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM Standard Test Method for Measuring
More informationUse of Phase-Change Materials to Enhance the Thermal Performance of Building Insulations
Introduction Use of Phase-Change Materials to Enhance the Thermal Performance of Building Insulations R. J. Alderman, Alderman Research Ltd., Wilmington, DE David W. Yarbrough, R&D Services, Inc., Cookeville,
More informationTREES Training for Renovated Energy Efficient Social housing
TREES Training for Renovated Energy Efficient Social housing Intelligent Energy -Europe programme, contract n EIE/05/110/SI2.420021 Section 2 Tools 2.1 Simplified heating load calculation Tamas CSOKNYAI
More informationField evaluation of the performance of a radiant heating/cooling ceiling panel system
Proceedings of 8 th Windsor Conference: Counting the Cost of Comfort in a changing world Cumberland Lodge, Windsor, UK, 1-13 April 214. London: Network for Comfort and Energy Use in Buildings, http://nceub.org.uk
More informationDetermination of thermal transmittance of window (test title)
INSTITUTE OF ARCHITECTURE AND CONSTRUCTION OF KAUNAS UNIVERSITY OF TECHNOLOGY SCIENCE LABORATORY OF BUILDING THERMAL PHYSICS Notified Body number: 2018 BANDYMAI ISO/IEC 17025 Nr. LA. 01.031 page (pages)
More information5. AN INTRODUCTION TO BUILDING PHYSICS
5. AN INTRODUCTION TO BUILDING PHYSICS P. Wouters, S. Martin ABSTRACT This chapter places the System Identification Competition in a broader context of evaluating the thermal performances of building components.
More informationDetermination of installed thermal resistance into a roof of TRISO-SUPER 12 BOOST R
INSTITUTE OF ARCHITECTURE AND CONSTRUCTION OF KAUNAS UNIVERSITY OF TECHNOLOGY LABORATORY OF BUILDING PHYSICS Notified Body number: 2018 TEST REPORT No. 037-10/11(C) SF/15 Date: 26 of November 2015 page
More informationCHAPTER 5 CONVECTIVE HEAT TRANSFER COEFFICIENT
62 CHAPTER 5 CONVECTIVE HEAT TRANSFER COEFFICIENT 5.1 INTRODUCTION The primary objective of this work is to investigate the convective heat transfer characteristics of silver/water nanofluid. In order
More informationTHERMAL TRANSMITTANCE OF MULTI-LAYER GLAZING WITH ULTRATHIN INTERNAL PARTITIONS. Agnieszka A. Lechowska 1, Jacek A. Schnotale 1
THERMAL TRANSMITTANCE OF MULTI-LAYER GLAZING WITH ULTRATHIN INTERNAL PARTITIONS Agnieszka A. Lechowska 1, Jacek A. Schnotale 1 1 Cracow University of Technology, Department of Environmental Engineering,
More informationCOVENANT UNIVERSITY NIGERIA TUTORIAL KIT OMEGA SEMESTER PROGRAMME: MECHANICAL ENGINEERING
COVENANT UNIVERSITY NIGERIA TUTORIAL KIT OMEGA SEMESTER PROGRAMME: MECHANICAL ENGINEERING COURSE: MCE 524 DISCLAIMER The contents of this document are intended for practice and leaning purposes at the
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 7.2 LABORATORY MEASUREMENT
More informationMeasurement method for the proficiency testing program
APLAC T088 Appendix Measurement method for the proficiency testing program Introductions This measurement method is prepared for use by the APLAC Proficiency Testing Program Photometric measurement of
More informationWrite Down Your NAME. Circle Your DIVISION. Div. 1 Div. 2 Div. 3 Div.4 8:30 am 9:30 pm 12:30 pm 3:30 pm Han Xu Ruan Pan
Write Down Your NAME, Last First Circle Your DIVISION Div. 1 Div. 2 Div. 3 Div.4 8:30 am 9:30 pm 12:30 pm 3:30 pm Han Xu Ruan Pan ME315 Heat and Mass Transfer School of Mechanical Engineering Purdue University
More informationVincent Barraud SOPREMA BASICS OF THERMAL INSULATION
Vincent Barraud SOPREMA BASICS OF THERMAL INSULATION Summary Part 1 - What is thermal conductivity? Part 2 - How the thermal conductivity is measured? Part 3 How to certify a lambda value? Part 1 - What
More informationChapter 3: Steady Heat Conduction. Dr Ali Jawarneh Department of Mechanical Engineering Hashemite University
Chapter 3: Steady Heat Conduction Dr Ali Jawarneh Department of Mechanical Engineering Hashemite University Objectives When you finish studying this chapter, you should be able to: Understand the concept
More informationTHERMAL ANALYSIS OF OVERGROUND BOUND CONSTRUCTIONS
ABSTRACT THERMAL ANALYSIS OF OVERGROUND BOUND CONSTRUCTIONS Sandris Liepins, Silvija Strausa, Uldis Iljins*, Uldis Gross* Latvia University of Agriculture, Faculty of Rural Engineering, *Latvia University
More informationEnergy flows and modelling approaches
Energy flows and modelling approaches Energy flows in buildings external convection infiltration & ventilation diffuse solar external long-wave radiation to sky and ground local generation fabric heat
More informationSimultaneous Conduction and Radiation Energy Transfer
Simultaneous Conduction and Radiation Energy Transfer Radiant energy can transfer from a colder to a warmer radiator. ###########, PhD Chemical Process Control Systems Engineer, PE TX & CA Abstract The
More informationLP PYRA Installation and Mounting of the Pyranometer for the Measurement of Global Radiation:
CENTRO DI TARATURA SIT N 124 TEL. +39.049.8977150 r.a. FAX +39.049.635596 1 Introduction LP PYRA 03 The LP PYRA 03 pyranometer measures the irradiance on a plane surface (Watt/ m 2 ). Measured irradiance
More information( ) PROBLEM C 10 C 1 L m 1 50 C m K W. , the inner surface temperature is. 30 W m K
PROBLEM 3. KNOWN: Temperatures and convection coefficients associated with air at the inner and outer surfaces of a rear window. FIND: (a) Inner and outer window surface temperatures, T s,i and T s,o,
More informationTHE EFFECTS OF CALORIMETER TILT ON THE INWARD-FLOWING FRACTION OF ABSORBED SOLAR RADIATION IN A VENETIAN BLIND
Collins, M.R., and Harrison, S.J., "The Effects of Calorimeter Tilt on the Inward-Flowing Fraction of Absorbed Solar Radiation in a Venetian Blind", ASHRAE Transactions, Vol. 107 (1), pp. 677-683, 2001.
More informationRadiant Heating Panel Thermal Analysis. Prepared by Tim Fleury Harvard Thermal, Inc. October 7, 2003
Radiant Heating Panel Thermal Analysis Prepared by Tim Fleury Harvard Thermal, Inc. October 7, 2003 Analysis Objective Perform a thermal test on a small sample of the concrete to determine the Thermal
More informationNUMERICAL ANALYSIS OF HEAT STORAGE AND HEAT CONDUCTIVITY IN THE CONCRETE HOLLOW CORE DECK ELEMENT
NUMERICAL ANALYSIS OF HEAT STORAGE AND HEAT CONDUCTIVITY IN THE CONCRETE HOLLOW CORE DECK ELEMENT Michal Pomianowski 1, Per Heiselberg 1, Rasmus Lund Jensen 1, and Hicham Johra 1 1 Aalborg University,
More informationELEC9712 High Voltage Systems. 1.2 Heat transfer from electrical equipment
ELEC9712 High Voltage Systems 1.2 Heat transfer from electrical equipment The basic equation governing heat transfer in an item of electrical equipment is the following incremental balance equation, with
More informationCRYOGENIC CONDUCTION COOLING TEST OF REMOVABLE PANEL MOCK-UP FOR ITER CRYOSTAT THERMAL SHIELD
CRYOGENIC CONDUCTION COOLING TEST OF REMOVABLE PANEL MOCK-UP FOR ITER CRYOSTAT THERMAL SHIELD K. Nam, a D. K. Kang, a W. Chung, a C. H. Noh, a J. Yu, b N. I. Her, b C. Hamlyn-Harris, b Y. Utin, b and K.
More informationLP NET. 1 About LP NET. 2 Working Principle. TEL r.a. FAX
CENTRO DI TARATURA SIT N 124 MEASURING INSTRUMENTS REGULATORS STRUMENTI DI MISURA REGOLATORI TEL. +39.049.8977150 r.a. FAX +39.049.635596 LP NET 1 About LP NET LP NET net radiometer is designed to measure
More informationEnergy and Buildings
Energy and Buildings 42 (2010) 29 33 Contents lists available at ScienceDirect Energy and Buildings journal homepage: www.elsevier.com/locate/enbuild A simplified calculation method for estimating heat
More informationThermal Interface Material Performance Measurement
Thermal Interface Material Performance Measurement Long Win Science & Technology Co., Ltd. www.longwin.com longwin@longwin.com 886-3-4643221 886-3-4986875 2007/07/16 Contents 1. Introduction Heat Transfer
More informationPROBLEM Node 5: ( ) ( ) ( ) ( )
PROBLEM 4.78 KNOWN: Nodal network and boundary conditions for a water-cooled cold plate. FIND: (a) Steady-state temperature distribution for prescribed conditions, (b) Means by which operation may be extended
More informationTHERMODYNAMICS METHODS OF HEAT TRANSFER RADIATION
VISUAL PHYSICS ONLINE THERMODYNAMICS METHODS OF HEAT TRANSFER RADIATION Radiation is the energy transferred by electromagnetic waves mainly infrared (IR), visible and ultraviolet (UV). All materials radiate
More informationExperimental Study of Heat Transfer Enhancement in a Tilted Semi-Cylindrical Cavity with Triangular Type of Vortex Generator in Various Arrangements.
Experimental Study of Heat Transfer Enhancement in a Tilted Semi-Cylindrical Cavity with Triangular Type of Vortex Generator in Various Arrangements. #1 Korake Supriya S, #2 Dr Borse Sachin L #1 P.G. Student,
More informationEVALUATION OF THERMAL ENVIRONMENT AROUND THE BLIND ON NON-UNIFOM RADIANT FIELDS A CFD SIMULATION OF HEAT TRANSFER DISTRIBUTION NEAR THE BLINDS
800 1500 6240 1600 1500 840 Proceedings of BS2015: EVALUATION OF THERMAL ENVIRONMENT AROUND THE BLIND ON NON-UNIFOM RADIANT FIELDS A CFD SIMULATION OF HEAT TRANSFER DISTRIBUTION NEAR THE BLINDS Nozomi
More informationArctice Engineering Module 3a Page 1 of 32
Welcome back to the second part of the second learning module for Fundamentals of Arctic Engineering online. We re going to review in this module the fundamental principles of heat transfer. Exchange of
More informationDevelopment of high-efficiency Stirling cryocoolers for high temperature superconducting motors
IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Development of high-efficiency Stirling cryocoolers for high temperature superconducting motors To cite this article: K Nakano
More informationL 18 Thermodynamics [3] Heat flow. Conduction. Convection. Thermal Conductivity. heat conduction. Heat transfer
L 18 Thermodynamics [3] Heat transfer convection conduction emitters of seeing behind closed doors Greenhouse effect Heat Capacity How to boil water Heat flow HEAT the energy that flows from one system
More informationTHERMAL DYNAMIC BEHAVIOR OF SINGLE COMPONENT: EXPERIMENTAL ANALYSIS AND NUMERICAL MODELING
U.P.B. Sci. Bull., Series C, Vol. 74, Iss. 1, 2012 ISSN 1454-234x THERMAL DYNAMIC BEHAVIOR OF SINGLE COMPONENT: EXPERIMENTAL ANALYSIS AND NUMERICAL MODELING Paolo BAGGIO 1, Alessandro PRADA 2 In the present
More informationThe energy performance of an airflow window
The energy performance of an airflow window B.(Bram) Kersten / id.nr. 0667606 University of Technology Eindhoven, department of Architecture Building and Planning, unit Building Physics and Systems. 10-08-2011
More informationTHERMAL ENVIRONMENT PREDICTION USING CFD WITH A VIRTUAL MANNEQUIN MODEL AND EXPERIMENT WITH SUBJECT IN A FLOOR HEATING ROOM
Proceedings of Building Simulation 11: THERMAL ENVIRONMENT PREDICTION USING CFD WITH A VIRTUAL MANNEQUIN MODEL AND EXPERIMENT WITH SUBJECT IN A FLOOR HEATING ROOM Ryoichi Kajiya 1, Kodai Hiruta, Koji Sakai
More informationFDTD analysis on the sound insulation performance of wall system with narrow gaps
FDTD analysis on the sound insulation performance of wall system with narrow gaps Takumi Asakura a Shinichi Sakamoto b Institute of Industrial Science, The University of Tokyo. Komaba 4-6-, Meguro-ku,
More informationTEST METHOD FOR THERMAL TRANSMITTANCE AND AIR INFILTRATION OF GARAGE DOORS
ANSI/DASMA 105-1992 (R2004) AMERICAN NATIONAL STANDARD TEST METHOD FOR THERMAL TRANSMITTANCE AND AIR INFILTRATION OF GARAGE DOORS Door & Access Systems Manufacturers Association, International Sponsor:
More informationCustomer: Ashton Industrial Sales Ltd. South Road, Harlow Essex CM20 2AR UNITED KINGDOM. Project/Customer: Profilex HM spacer
Page 1 of 11 Customer: Ashton Industrial Sales Ltd. South Road, Harlow Essex CM20 2AR UNITED KINGDOM Project/Customer: Profilex HM spacer Content: U f simulation of profiles in accordance to EN ISO 10077-2
More informationStudy on Thermal Load Calculation for Ceiling Radiant Cooling Panel System
Study on Thermal Load Calculation for Ceiling Radiant Cooling Panel System Sei Ito, Yasunori Akashi, Jongyeon Lim Shimizu Corporation, Tokyo, Japan University of Tokyo, Tokyo, Japan Abstract The ceiling
More informationISO INTERNATIONAL STANDARD. Thermal performance of windows, doors and shutters Calculation of thermal transmittance Part 1: Simplified method
INTERNATIONAL STANDARD ISO 10077-1 First edition 2000-07-15 Thermal performance of windows, doors and shutters Calculation of thermal transmittance Part 1: Simplified method Performance thermique des fenêtres,
More informationCalculating the heat transfer coefficient of frame profiles with internal cavities
Calculating the heat transfer coefficient of frame profiles with internal cavities SUBMITTED: December 2001 REVISED: January 2004 PUBLISHED: March 2004 Peter A. Noyé, M.Sc (Eng) Department of Civil Engineering,
More informationAGING OF THERMAL INSULATION MATERIALS BY ACCELERATED LABORATORY TEST METODS
AGING OF THERMAL INSULATION MATERIALS BY ACCELERATED LABORATORY TEST METODS Jae-Sik Kang 1, 2 Gyoung-Seok CHOI 1 Young-Sun JEONG 1 Seung-Eon Lee 1 1 Korea Institute of Construction Technology, 2311, Daehwa-Dong,
More informationChapter 2 HEAT CONDUCTION EQUATION
Heat and Mass Transfer: Fundamentals & Applications Fourth Edition Yunus A. Cengel, Afshin J. Ghajar McGraw-Hill, 2011 Chapter 2 HEAT CONDUCTION EQUATION Mehmet Kanoglu University of Gaziantep Copyright
More informationChapter 2 HEAT CONDUCTION EQUATION
Heat and Mass Transfer: Fundamentals & Applications 5th Edition in SI Units Yunus A. Çengel, Afshin J. Ghajar McGraw-Hill, 2015 Chapter 2 HEAT CONDUCTION EQUATION Mehmet Kanoglu University of Gaziantep
More informationEnergy and Insolation Review 2
Energy and Insolation Review 2 The diagram below shows a container of water that is being heated. 1. The movement of water shown by the arrows is most likely caused by (1) density differences (2) insolation
More informationADVANCED ROOF COATINGS: MATERIALS AND THEIR APPLICATIONS
ADVANCED ROOF COATINGS: MATERIALS AND THEIR APPLICATIONS Abstract J.M. Bell 1 and G.B. Smith 2 The use of low emittance and high solar reflectance coatings is widespread in window glazings, wall and roof
More informationSolar Flat Plate Thermal Collector
Solar Flat Plate Thermal Collector INTRODUCTION: Solar heater is one of the simplest and basic technologies in the solar energy field. Collector is the heart of any solar heating system. It absorbs and
More informationEXPERIMENTAL DETERMINATION OF TEMPERATURES OF THE INNER WALL OF A BOILER COMBUSTION CHAMBER FOR THE PURPOSE OF VERIFICATION OF A CFD MODEL
ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS Volume LIX 26 Number 1, 2011 EXPERIMENTAL DETERMINATION OF TEMPERATURES OF THE INNER WALL OF A BOILER COMBUSTION CHAMBER FOR THE PURPOSE
More informationExergy Analysis of Solar Air Collector Having W Shaped Artificial Roughness
Advances in Materials Science and Mechanical Engineering Research Volume 1, Number 1 (2015), pp. 25-32 International Research Publication House http://www.irphouse.com Exergy Analysis of Solar Air Collector
More informationthe distance of conduction (the thickness), the greater the heat flow.
R-Values In heat conduction, the rate of heat flow depends on the temperature difference between sides, the thickness, and the area in contact. The greater the temperature difference, the greater the heat
More informationFIND: (a) Sketch temperature distribution, T(x,t), (b) Sketch the heat flux at the outer surface, q L,t as a function of time.
PROBLEM 5.1 NOWN: Electrical heater attached to backside of plate while front surface is exposed to convection process (T,h); initially plate is at a uniform temperature of the ambient air and suddenly
More informationW-Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater
W-Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater Alok Kumar Rohit 1, A.M. Lanjewar 2 1PhD Scholar, Mechanical Engineering Department, AISECT University Bhopal, M.P. - 462024 India
More informationHIGHLY INSULATING AEROGEL GLAZING
HIGHLY INSULATING AEROGEL GLAZING A. Beck, M. Reim, W. Körner, J. Fricke Bavarian Center for Applied Energy Research, ZAE Bayern e.v., Am Hubland, 9774 Würzburg, Germany, Phone (+49) 931/7564-32, Fax -6,
More informationLaserComp, Inc., DESCRIPTION OF THE INSTRUMENT
LaserComp, Inc., 2001-2004 1. DESCRIPTION OF THE INSTRUMENT The FOX50 instrument consists of the parallel round plates assembly with guard insulation cylinders, and a body where all electronics is contained
More informationISO INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO 0077-2 First edition 2003-0-0 Thermal performance of windows, doors and shutters Calculation of thermal transmittance Part 2: Numerical method for frames Performance thermique
More informationARCH 348 BUILDING AND ENVIRONMENTAL SYSTEMS
ARCH 348 BUILDING AND ENVIRONMENTAL SYSTEMS Instructor: Prof. Dr. Uğur Atikol Web site for instructor: http://staff.emu.edu.tr/uguratikol/ Web site for the course: http://staff.emu.edu.tr/uguratikol/en/teaching/courses/arch348-building-andenvironmental-systems-in-architecture
More informationOIML R 141 RECOMMENDATION. Edition 2008 (E) ORGANISATION INTERNATIONALE INTERNATIONAL ORGANIZATION
INTERNATIONAL RECOMMENDATION OIML R 141 Edition 2008 (E) Procedure for calibration and verification of the main characteristics of thermographic instruments Procédure pour l'étalonnage et la vérification
More informationTRANSPARENT INNOVATIVE MATERIALS: ENERGETIC AND LIGHTING PERFORMANCES EVALUATION
TRANSPARENT INNOVATIVE MATERIALS: ENERGETIC AND LIGHTING PERFORMANCES EVALUATION C. Buratti, E. Moretti Department of Industrial Engineering, Perugia University Via G. Duranti, 67-06125 Perugia, Italy.
More informationSupplemental Information. Storage and Recycling of Interfacial. Solar Steam Enthalpy
JOUL, Volume 2 Supplemental Information Storage and Recycling of Interfacial Solar Steam Enthalpy Xiuqiang Li, Xinzhe Min, Jinlei Li, Ning Xu, Pengchen Zhu, Bin Zhu, Shining Zhu, and Jia Zhu Supplemental
More informationPROBLEM 1.2 ( ) 25 C 15 C dx L 0.30 m Ambient air temperature, T2 (C)
PROBLEM 1.2 KNOWN: Inner surface temperature and thermal conductivity of a concrete wall. FIND: Heat loss by conduction through the wall as a function of ambient air temperatures ranging from -15 to 38
More informationPubl. No. T Rev. a326 ENGLISH (EN) March 6,
20.3.8 Excerpt from Technical Note Assessing thermal bridging and insulation continuity (UK example) 20.3.8.1 Credits This Technical Note was produced by a working group including expert thermographers,
More informationThermal Analysis. with SolidWorks Simulation 2013 SDC. Paul M. Kurowski. Better Textbooks. Lower Prices.
Thermal Analysis with SolidWorks Simulation 2013 Paul M. Kurowski SDC PUBLICATIONS Schroff Development Corporation Better Textbooks. Lower Prices. www.sdcpublications.com Visit the following websites to
More informationDemonstrate understanding of aspects of heat
Demonstrate understanding of aspects of heat Heat Transfer Temperature - temperature is a measure of the average kinetic energy of the particles making up an object (measured in C or K) 0 K = -273 o C
More informationApplication of G100/120 Thermal Imaging Camera in Energy Efficiency Measuring in Building Construction
SERBIAN JOURNAL OF ELECTRICAL ENGINEERING Vol. 10, No. 1, Februrary 2013, 153-164 UDK: 621.397.331.2:697 DOI: 10.2298/SJEE1301153P Application of G100/120 Thermal Imaging Camera in Energy Efficiency Measuring
More informationDIAGNOSIS OF INSULATED BUILDING WALLS USING PASSIVE INFRARED THERMOGRAPHY AND NUMERICAL SIMULATIONS
7th European Workshop on Structural Health Monitoring July 8-11, 2014. La Cité, Nantes, France More Info at Open Access Database www.ndt.net/?id=17106 DIAGNOSIS OF INSULATED BUILDING WALLS USING PASSIVE
More informationHFM 100 Series. Thermal Conductivity Meter for measurement of insulation and construction materials.
HFM 100 Series Conforms to International Standards ASTM C518, ISO 8301, and EN 12667 Thermal Conductivity Meter for measurement of insulation and construction materials. Hot Disk TPS -160 to 1000 C HFM
More informationExperimental Investigation of Adiabatic Film Cooling Effectiveness and Heat Transfer Coefficients over a Gas Turbine Blade Leading Edge Configuration
Experimental Investigation of Adiabatic Film Cooling Effectiveness and Heat Transfer Coefficients over a Gas Turbine Blade Leading Edge Configuration Giridhara Babu Yepuri 1,a, Ashok Babu Talanki Puttarangasetty
More informationTHERMAL PROPERTY MEASUREMENT TECHNIQUES. AND SOME RESULTS FOR CdTe. H. F. Poppendiek D. J. Connelly R. K. Livett
THERMAL PROPERTY MEASUREMENT TECHNIQUES AND SOME RESULTS FOR CdTe H. F. Poppendiek D. J. Connelly R. K. Livett QUARTERLY REPORT NO. 1 PERIOD: MARCH 10 TO JUNE 10, 1983 "The views and conclusions contained
More informationPROBLEM 1.3. dt T1 T dx L 0.30 m
PROBLEM 1.3 KNOWN: Inner surface temperature and thermal conductivity of a concrete wall. FIND: Heat loss by conduction through the wall as a function of outer surface temperatures ranging from -15 to
More informationAR/IA 241 LN 231 Lecture 4: Fundamental of Energy
Faculty of Architecture and Planning Thammasat University A/IA 24 LN 23 Lecture 4: Fundamental of Energy Author: Asst. Prof. Chalermwat Tantasavasdi. Heat For a specific substance, the heat given to the
More informationNumerical Analysis of Comfort and Energy Performance of Radiant Heat Emission Systems
Numerical Analysis of Comfort and Energy Performance of Radiant Heat Emission Systems. Fabian Ochs, Mara Magni, Michele Bianchi Janetti, Dietmar Siegele Unit for Energy Efficient Buildings, UIBK z / [m]....3...9
More informationIntegrated Circuits Thermal Test Method Environment Conditions - Natural Convection (Still Air)
EIA/JEDEC STANDARD Integrated Circuits Thermal Test Method Environment Conditions - Natural Convection (Still Air) EIA/JESD51-2 DECEMBER 1995 ELECTRONIC INDUSTRIES ASSOCIATION ENGINEERING DEPARTMENT NOTICE
More informationExploring Low Cost Infrared Cameras to Reduce Energy Performance Gap in Buildings: Using the Flir One Thermal Imaging Camera
Exploring Low Cost Infrared Cameras to Reduce Energy Performance Gap in Buildings: Using the Flir One Thermal Imaging Camera Colin Pearson, BSRIA Ltd. UK 29 June 2017 Sustainable Places Conference 2017
More informationComputational Modelling of the Impact of Solar Irradiance on Chemical Degradation of Painted Wall Hangings in an Historic Interior
Computational Modelling of the Impact of Solar Irradiance on Chemical Degradation of Painted Wall Hangings in an Historic Interior Z. Huijbregts *1, A.W.M. van Schijndel 1, H.L. Schellen 1, K. Keune 2,
More informationNFRC THERMAL PERFORMANCE TEST REPORT. Rendered to: C.R. LAURENCE CO., INC.
NFRC 102-2014 THERMAL PERFORMANCE TEST REPORT Rendered to: C.R. LAURENCE CO., INC. SERIES/MODEL: 45X - High Performance Dual Thermally Broken Storefront TYPE: Glazed Wall Systems (Site-built) Summary of
More informationTechnical Notes. Introduction. PCB (printed circuit board) Design. Issue 1 January 2010
Technical Notes Introduction Thermal Management for LEDs Poor thermal management can lead to early LED product failure. This Technical Note discusses thermal management techniques and good system design.
More informationTick the box next to those resources for which the Sun is also the source of energy.
1 (a) The source of solar energy is the Sun. Tick the box next to those resources for which the Sun is also the source of energy. coal geothermal hydroelectric nuclear wind [2] (b) Fig. 4.1 shows a solar
More informationSTUDY OF COOLING SYSTEM WITH WATER MIST SPRAYERS FUNDAMENTAL EXAMINATION OF PARTICLE SIZE DISTRIBUTION AND COOLING EFFECTS
STUDY OF COOLING SYSTEM WITH WATER MIST SPRAYERS FUNDAMENTAL EXAMINATION OF PARTICLE SIZE DISTRIBUTION AND COOLING EFFECTS Yamada Hideki 1, Yoon Gyuyoug 1 Okumiya Masaya 1, Okuyama Hiroyasu 2 1 Graduate
More informationExperimental approach on natural frequency of window vibration induced by low frequency sounds
INTER-NOISE 216 Experimental approach on natural frequency of window vibration induced by low frequency sounds Tetsuya DOI 1 ; Keiichiro IWANAGA 1 ; Michiko JIMBO 2 1 Kobayasi Institute of Physical Research,
More informationFUNDAMENTALS OF HVAC
FUNDAMENTALS OF HVAC Prof.Dr. Yusuf Ali KARA Res.Asst. Semih AKIN 1 INTRODUCTION Terminology: HVAC: Heating, ventilating, air-conditioning and refrigerating. Air conditioning is the process of treating
More informationVALIDATION OF REYNOLDS AVERAGED MODEL AND LARGE EDDY SIMULATION IN ACTUAL FLOOR HEATING ROOM. Hiroki Ono 1 and Koji Sakai 1
Proceedings of Building Simulation 11: VALDATON OF RYNOLDS AVRAD MODL AND LAR DDY SMULATON N ACTUAL FLOOR HATN ROOM Hiroki Ono 1 and Koji Sakai 1 1 School of Science and Technology, Meiji University, Kawasaki,
More informationNFRC THERMAL PERFORMANCE TEST REPORT. Rendered to: NORTH EAST WINDOWS USA, INC.
NFRC 102-2014 THERMAL PERFORMANCE TEST REPORT Rendered to: NORTH EAST WINDOWS USA, INC. SERIES/MODEL: 100 Double Hung TYPE: Vertical Slider (Double Hung) Summary of Results Standardized Thermal Transmittance
More informationOrdinary Level Physics Long Questions: TEMPERATURE AND HEAT
Ordinary Level Physics Long Questions: TEMPERATURE AND HEAT Temperature 2014 Question 7 (a) [Ordinary Level] The temperature of an object can be measured using a thermometer which is based on a suitable
More informationResearch Article Study on Effect of Number of Transparent Covers and Refractive Index on Performance of Solar Water Heater
Renewable Energy Volume 14, Article ID 757618, 11 pages http://dx.doi.org/1.1155/14/757618 Research Article Study on Effect of Number of Transparent Covers and Refractive Index on Performance of Solar
More informationModel 3024 Albedometer. User s Manual 1165 NATIONAL DRIVE SACRAMENTO, CALIFORNIA WWW. ALLWEATHERINC. COM
Model 3024 Albedometer User s Manual 1165 NATIONAL DRIVE SACRAMENTO, CALIFORNIA 95834 WWW. ALLWEATHERINC. COM TABLE OF CONTENTS INTRODUCTION... 1 THEORY OF OPERATION... 2 General Description... 2 Accuracy...
More informationAbsorptivity, Reflectivity, and Transmissivity
cen54261_ch21.qxd 1/25/4 11:32 AM Page 97 97 where f l1 and f l2 are blackbody functions corresponding to l 1 T and l 2 T. These functions are determined from Table 21 2 to be l 1 T (3 mm)(8 K) 24 mm K
More informationISO INTERNATIONAL STANDARD. Thermal insulation for building equipment and industrial installations Calculation rules
INTERNATIONAL STANDARD ISO 12241 Second edition 2008-06-15 Thermal insulation for building equipment and industrial installations Calculation rules Isolation thermique des équipements de bâtiments et des
More informationISO 7730 INTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO 7730 Third edition 2005-11-15 Ergonomics of the thermal environment Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices
More information9 th International Conference on Quantitative InfraRed Thermography July 2-5, 2008, Krakow - Poland Application of infrared thermography for validation of numerical analyses results of a finned cross-flow
More informationDepartment of Mechanical Engineering ME 96. Free and Forced Convection Experiment. Revised: 25 April Introduction
CALIFORNIA INSTITUTE OF TECHNOLOGY Department of Mechanical Engineering ME 96 Free and Forced Convection Experiment Revised: 25 April 1994 1. Introduction The term forced convection refers to heat transport
More informationInfrared Temperature Calibration 101 Using the right tool means better work and more productivity
Infrared Temperature Calibration 101 Using the right tool means better work and more productivity Application Note Infrared thermometers let you measure a target s surface temperature from a distance without
More informationJOHN c. DUKE, JR., AND STEVEN c. WARFIELD
84 TRANSPORTATION RESEARCH RECORD 1347 Abridgment Evaluation of Infrared Thermography as a Means for Detecting Delaminations in Reinforced Concrete Bridge Substructure Elements JOHN c. DUKE, JR., AND STEVEN
More information