HVAC hisoblash formulasi

I、harorat:

Selsiy (C) va Farengeyt (F)

Farengeyt = 32 + Selsiy × 1,8

Selsiy = (Farengeyt -32) /1,8

Kelvin (K) va Selsiy (C)

Kelvin (K) = Selsiy (C) +273,15

II, bosim konvertatsiyasi:

Mpa, Kpa, pa, bar

1Mpa=1000Kpa；

1Kpa=1000pa；

1Mpa=10bar；

1bar=0,1Mpa=100Kpa；

1atmosfer=101,325Kpa=1bar=1Kilogram；

1bar=14,5psi；

1psi=6,895Kpa；

1 kg/sm2=105=10 mH2O=1 bar=0,1 MPa

1 Pa=0,1 mmH2O=0,0001 mH2O

1 mH2O=104 Pa=10 kPa

III, Shamol tezligi, ovoz balandligini o'zgartirish

1CFM =1,699 M³/H=0,4719 l/s

1M³/H=0,5886CFM

1l/s=2,119CFM

1FPM=0,3048 m/min=0,00508 m/s

IV, Sovutish quvvati va quvvati:

1KVt=1000 Vt

1KW=861Kkal/soat=0,39 P（sovutish quvvati）

1Vt= 1J/s

1USTR=3024Kkal/soat=3517W（sovutish quvvati）

1BTU=0,252kkal/soat=1055J

1BTU/H=0,252kkal/soat

1BTU/H=0,2931 Vt（sovutish quvvati）

1MTU/H=0,2931KVt（sovutish quvvati）

1HP（elektr energiyasi）=0,75KV（elektr energiyasi）

1KVt (elektr energiyasi)=1,34HP (elektr energiyasi)

1RT (sovutish quvvati) = 3.517KVt (sovutish quvvati)

1KVt (sovutish quvvati）=3,412 MBH

1P（sovutish quvvati）=2200kkal/soat=2,56KVt

1kkal/soat=1,163 Vt

V、Havo sovutisho'rnatish qalinligi va sovutish quvvati:

1,5 mm2=12A-20A（2650~4500Vt） 1P~2P

2,5mm2=20-25A（4500~5500Vt） 2P

4mm2=25-32A（5500~7500Vt） 2P~3P

6mm2=32-40A（7500~8500Vt） 3P~4P

VI, Sovutgichni hisoblash formulasi:

1, Kengaytirish valfini tanlash: sovuq tonna + 1,25% ruxsat

2, Bosish kuchi: 1P = 0,735 kVt

3, Sovutgich zaryadi: Sovutish quvvati (KVt) ÷3,516 x 0,58

4、Havo sovutgichining suv oqimi: sovutish quvvati (KVt) ÷ harorat farqi ÷1,163

5, Suv bilan sovutilgan vintli mashinaning sovutish suvi oqim tezligi: sovutish quvvati (KVt) × 0,86÷ harorat farqi

6, Suv bilan sovutilgan vintli mashinaning sovutish suvi oqim tezligisovutish quvvatiKW+ press quvvati) ×0,86÷ harorat farqi

7、Brüt isitish qiymati QT=QS+QL

8, Havo sovutish: QT =0,24*∝*L*(h1-h2)

9, sezilarli issiqlik havo sovutish: QS = Cp * ∝ * L * (T1-T2)

10, Havo sovutishning yashirin isishi: QL=600*∝*L*(W1-W2)

11,Muzlatuvchi suvhajmi:L/sV1= Q1/(4,187△T1)

12, sovutish suvi hajmi: L/sV2=Q2/(4,187△T2)=(3,516+KVt/TR)，Q2=Q1+N=TR*3,516+KW/TR*TR=（3,516+KVt/TR） *TR

13、Sovutgich samaradorligi: EER= Sovutish quvvati (Mbtu/soat)/quvvat iste’moli (KVt);COP= Sovutgich quvvati (KVt)/ quvvat sarfi (KVt)

14, Qisman sovutish yukining ishlashi: NPLV=1/(0,01/A+0,42/B+0,45/C+0,12/D)

15, To'liq yuk oqimi (uch faza): FLA=N/√3 UCOSph

16, Toza havo hajmi: Lo=nV

17, havota'minlash hajmi: L=Qs/〔Cp*∝*(T1-T2)〕

18, Fan quvvati: N1=L1*H1/(102*n1*n2)

19, Suv nasosining quvvati: N2 = L2 * H2 * r / (102 * n3 * n4)

20, Quvur diametri: D=√4*1000L2/(p*v)

21, Kanal maydoni: F=a*b*L1/(1000u)