IZRAČUN MEMBRANSKE RAZTEZNE POSODE - "MRP" za HLADNOVODNE SISTEME (DIN 4807/2)

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IZPIS IZRAČUN MEMBRANSKE RAZTEZNE POSODE - "MRP" za HLADNOVODNE SISTEME Izhodiščni podatki: Objkt : Vrtc Kamnitnik Projkt : PZI Uporaba MRP : Črpalna vrtina Datum : 30.8.2017 Obdlal : Zupan Skupna hladilna moč : Q = 136 kw Najnižja tmpratura sistma: t v = 10 ºC Najvišja tmp. sistma (okolic): t OK = 25 ºC Hladilni mdij: voda Količina vod in raztzki: Količina vod v sistmu: V A = 826 l Koficint raztzanja mdija n = 25,00 % Raztzk vod: V = 3 l Tlačn razmr: Najvišji dlovni tlak: p H = 10,00 bar (absolutno) Prdtlak dušika: p v = 2,50 bar (absolutno) Najnižji dlovni tlak: p M = 0,00 bar (absolutno) Izračun in določitv raztzn posod: Nazivni volumn raztzn posod: pm ph V p v ( p - p ) H M Izbrani prvi včji nazivni volumn: V n dj = 18 l Prdtlak polnjnja: p v = 1,5 bar (nadtlak) Raztzna cv: Q NL 20 kw... ustrza minimalni svtli prmr 12 mm, oziroma R 3/8" 20 kw < Q NL 350 kw... ustrza minimalni svtli prmr 20 mm, oziroma R 3/4" Varnostni vntil: DN 20 (d 1 /d 2 = DN20/25) 6 l E1-1_Zaprta_raztzna_DIN4807_BETA Stran 1/1

IZRAČUN MEMBRANSKE RAZTEZNE POSODE - "MRP" za tmpratur v sistmu 100ºC Izhodiščni podatki: Objkt : Vrtc Kamnitnik Projkt : PZI Uporaba MRP : Varovanj kotla Datum : 30.8.2017 Obdlal : Zupan Skupna toplotna moč : Q = 49,0 kw Tmpratura prdtoka : t v = 80 ºC Količina vod in raztzki: Količina vod v sistmu: V A = 144 l Koficint raztzanja mdija n = 2,91 % Raztzk vod: V = 4,2 l Po DIN 4807 Til 2 j potrbno upoštvati tudi dodatk vodn količin V v, ki znaša pri posodah: - z nazivno prostornino V n < 15 l min. 20% od V n - z nazivno prostornino V n > 15 l 0,5% od V A, vndar minimalno 3 l Dodatk vodn količin: V v = 3,0 l Upoštvana količina vod za izračun raztzn posod oz. minimalni koristni volumn: V + V v = 7 l Koristni volumn raztzn posod mora biti včji od količin vod, ki s raztza. V 0 > V + V v Tlačn razmr: Statični tlak : p st = 0,50 bar Začtni tlak / prdtlak dušika : p o = p a = 0,50 bar Tlak odpiranja varnostnga vntila: p sv = 2,50 bar Končni dlovni tlak v posodi : p = 2,00 bar Učink oz. faktor tlaka Df: Df = ( p + 1) -( p0 + 1) = p + 1 Df = 0,5 Izračun in določitv raztzn posod: Nazivni volumn raztzn posod: V n = p + 1 ( + ) ( V V ) V V = + v v p - p 0 Df 14,4 l Izbrani prvi včji nazivni volumn: V n dj = 18,0 l Djanski koristni volumn: V 0-IST = 9,0 l V 0-IST > V + V v = 7,19509 l Prdtlak polnjnja: pf = 0,80 bar Djanski dodatk vodn količin: V v-nov = 3,80 l Djanski prdtlak polnjnja: pf dj = 0,90 bar E2-2_Zaprta_raztzna_DIN4807_BETA Stran 1/2

IZRAČUN MEMBRANSKE RAZTEZNE POSODE - "MRP" za tmpratur v sistmu 100ºC Začtni tlak gld na statično višino. Mmbrana j popolnoma raztgnjna p st = p o = p a = 0,50 bar Prdtlak polnjnja v hladnm stanju za količino vod V v. V v = 3,0 l pf = 0,80 bar Ob povčani količini vod V vnov zaradi včjga koristnga volumna j djanski prdtlak V v nov = 3,8 l pf dj = 0,90 bar Pri najvišji tmpraturi prdtoka j v raztzni posodi dlovni tlak. p = 2,00 bar Raztzna cv: Q NL 20 kw... ustrza minimalni svtli prmr 12 mm, oziroma R 3/8" 20 kw < Q NL 350 kw... ustrza minimalni svtli prmr 20 mm, oziroma R 3/4" Varnostni vntil: DN 15 (d 1 /d 2 = DN15/20) E2-2_Zaprta_raztzna_DIN4807_BETA Stran 2/2

IZPIS IZRAČUN MEMBRANSKE RAZTEZNE POSODE - "MRP" za HLADNOVODNE SISTEME Izhodiščni podatki: Objkt : Vrtc Kamnitnik Projkt : PZI Uporaba MRP : Varovanj izparilnika 1 v TČ Datum : 30.8.2017 Obdlal : Zupan Skupna hladilna moč : Q = 136 kw Najnižja tmpratura sistma: t v = 3 ºC Najvišja tmp. sistma (okolic): t OK = 32 ºC Hladilni mdij: 30% tiln glikol Količina vod in raztzki: Količina vod v sistmu: V A = 262 l Koficint raztzanja mdija n = 1,35 % Raztzk vod: V = 4 l Tlačn razmr: Rakcijski tlak varnostnga vntila: p sv = 3,50 bar (absolutno) Najvišji dlovni tlak: p H = 3,00 bar (absolutno) Prdtlak dušika: p v = 2,00 bar (absolutno) Najnižji dlovni tlak: p M = 2,50 bar (absolutno) Izračun in določitv raztzn posod: Nazivni volumn raztzn posod: pm ph V p v ( p - p ) H M 27 l Izbrani prvi včji nazivni volumn: V n dj = 25 l Prdtlak polnjnja: p v = 1,0 bar (nadtlak) Raztzna cv: Q NL 20 kw... ustrza minimalni svtli prmr 12 mm, oziroma R 3/8" 20 kw < Q NL 350 kw... ustrza minimalni svtli prmr 20 mm, oziroma R 3/4" Varnostni vntil: DN 20 (d 1 /d 2 = DN20/25) EP-1_Zaprta_raztzna_DIN4807_BETA Stran 1/1