Project 2 Josh Rodriguez and Becca Behrens Introduction: Section I of the site Dry, hot Arizona climate Linen supply and cleaning facility Occupied 4am-10pm with two shifts of employees PHOENIX, ARIZONA 1
Thermal Zones We noticed there was a large gap in usage between the factory and the rest of the spaces, because of this we are planning on dividing the space into two thermal zones, based on the equipment use of the spaces which would be a huge contributing factor to the heating/cooling needs of the space. Thermal Zoning 2
Strategies Zone A requires heating and cooling depending on the surrounding weather Zone B will require only cooling for the entire year Large thermal masses would be beneficial for both spaces so one in the middle would be very effective Ventilation would also be extremely effective for helping to cool both spaces Building Design WEST ELEVATION ZONE B (FACTORY) SECTION ZONE A SECTION 3
Building design ZONE A ZONE B THERMAL MASS WALL ZONE A ZONE B Zone A cooling strategies include: high thermal mass, ventilation, and earth tube cooling. Heating: Solar radiation for the winter months fall summer spring winter fall summer spring winter Zone B cooling strategies include: ventilation, having a large thermal mass, and night ventilation. Heating: Will be needed very little, solar radiation Our building accomplishes passive heating and cooling techniques by using the appropriate thermal strategy for the season and climate based on the bioclimatic chart information 4
Solar Envelope The site is very large so no buildings on nearby sites would be effected. However, the shadows of the building on the site during the colder months of the year (November through February) are confined to the nearby area of the building and would therefore not influence any surrounding buildings during the times when they might require the sun to help heat them if any were to be built in the nearby vicinity. Wind on Site Microclimates: The main one created is on the left side of Zone A where there is a sheltered outdoor space which would be protected from the wind. Site plan Our building is placed to take advantage of the wind which crosses through the two different zones of the building in order to cool it off and help to remove the hot air generated by the machines inside. 5
Spring Winter Spring Winter Fall Summer 10/23/2016 Heating Months: winter/spring shadows Winter will be largely effected by shadows, however spring shadows will not be as dramatic 9am 12pm 3pm Climate Response Matrix This shows us that the NE corner/center of the site (mostly in red) will have sun light and wind for most of the year. This would make those areas well suited for our project because we would be able to take advantage of the wind to passively cool the space as well as use the sun to help light it. 6
COOLING STRATEGIES Factory (Zone B) Section Our system for venting the space would be effective at removing the heat and cooling off the spaces according to the specific needs of each zone and how much heat each would need to remove Zone A section Wind on site Ventilation Pattern Site plan Wind crosses through the building from the east at a constant rate throughout the entire year. This makes it a reliable way to ventilate the space to cool it down during the overheated months, especially in ZONE B, where machines going constantly would heat it to uncomfortable temperatures during most of the year. Floorplan Thermal mass Factory section 7
Glazing + Thermal Mass Thermal Mass Solar Apertures Heating Months would be November-February (Zone A only) but the heating needed could be compensated by the heat gained from the people working, therefore we decided to keep the windows shaded. Low angles of sun during the winter would allow light and heat into the spaces from the West side getting some late afternoon sun where it is needed. Shading 1 2 Our building would benefit from shading for most of the year in Zone B and from Feb to October in Zone A because during these times we don t need heating. Two foot overhangs are above all the windows in both Zone A and B in order to help shade from the steep sun angles during the warmer months It would be beneficial to have some vertical shading devices as well as looking into more creative solutions of shading the factory space to better protect it from getting any excess sun that would make the space uncomfortably warm. 9am 12pm 3pm 9am 12pm 3pm Angle 1 Angle 2 8
Re-Design: Trombe ceiling added (a roof pond would be more effective-bth) Oriented to take advantage of sun when it is needed Increased R Values Improved shading devices Factory space rotated to allow better air flow Design Critique The addition of better shading devices and well as increasing the R and U values of the walls, windows, and ceilings helped to make our building more effective at staying passively comfortable during the hot months of the year. In Zone A, we would need to cool in the summer and fall and heat on the colder days in the winter to achieve comfortable temperatures. For Zone B, we would need to compensate for the heat gained from the machines but ventilating the site during the warmer months and heating in the morning and night of the cooler months when the sun is not out to help warm up the space passively. 9
Conclusion: Our main priority in our building is cooling, year round. This means that we will have to consider it a tradeoff to focus on cooling above heating. Our strategies worked best together in the factory where our use of stack and cross ventilation help to vent the space and cool it off. Model Images 10