HVAC Lissafi Formula

I, Zazzabi:

Celsius (C) da Fahrenheit (F)

Fahrenheit = 32 + Celsius × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) da kuma Celsius (C)

Kelvin (K) = Celsius (C) +273.15

II, Juyin matsin lamba:

Mpa,Kpa,pa,bar

1Mpa=1000Kpa;

1Kpa=1000pa;

1Mpa=10 bar;

1bar=0.1Mpa=100Kpa;

1 atmospher = 101.325Kpa = 1 mashaya = 1 kilogiram;

1 bar = 14.5psi;

1psi=6.895Kpa;

1 kg/cm2=105=10mH2O=1 bar=0.1MPa

1 Pa=0.1 mmH2O=0.0001mH2O

1 mH2O = 104 Pa = 10 kPa

III, saurin iska, jujjuyawar ƙara

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, iyawar sanyaya da ƙarfi:

1KW = 1000 W

1KW = 861Kcal / h = 0.39 P (ƙarfin sanyaya)

1W= 1 J/s

1USTR = 3024Kcal / h = 3517W (ƙarfin sanyaya)

1BTU=0.252kcal/h=1055J

1BTU/H=0.252kcal/h

1BTU/H = 0.2931W (ƙarfin sanyaya)

1MTU/H = 0.2931KW (yawan sanyaya)

1HP (lantarki) = 0.75KW (lantarki)

1KW (lantarki) = 1.34HP (lantarki)

1RT (ƙarar sanyaya) = 3.517KW (ƙarar sanyaya)

1KW (ƙarfin sanyi)= 3.412 MBH

1P (ƙarar sanyi)=2200kcal/h=2.56KW

1 kcal/h=1.163W

V,Kwandishankauri na shigarwa da ƙarfin sanyaya:

1.5mm2=12A-20A(2650~4500W) 1P ~ 2P

2.5mm2=20-25A(4500~5500W) 2P

4mm2=25-32A(5500~7500W) 2P ~ 3P

6mm2=32-40A(7500~8500W) 3P~4P

VI, dabarar lissafin firiji:

1, Zaɓin bawul ɗin haɓakawa: ton sanyi + 1.25% izini

2, Latsa ikon: 1P = 0.735kW

3. Cajin sanyi: Iyawar sanyaya (KW) ÷3.516 x 0.58

4, Ruwa kwarara na iska mai sanyaya: Cooling iya aiki (KW) ÷ bambancin zafin jiki ÷1.163

5, Cooling ruwa kwarara kudi na ruwa-sanyaya dunƙule inji: Cooling iya aiki (KW) ×0.86÷ zazzabi bambanci

6, Cooling ruwa kwarara kudi na ruwa-sanyaya dunƙule injiikon sanyaya KW+ ikon danna) ×0.86÷ bambancin zafin jiki

7. Babban darajar dumama QT=QS+QL

8, Iska sanyaya: QT = 0.24 * ∝ * L * (h1-h2)

9, Muhimmancin zafi iska sanyaya: QS = Cp * ∝ * L * (T1-T2)

10, Latent zafi na iska sanyaya: QL=600*∝*L*(W1-W2)

11,Ruwan daskarewagirma:L/sV1=Q1/(4.187△T1)

12 *TR

13, Refrigeration yadda ya dace: EER = Refrigeration iya aiki (Mbtu / h) / ikon amfani (KW);COP = Ƙarfin firji (KW) / yawan wutar lantarki (KW)

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15, Cikakken kaya na yanzu (fashi uku): FLA = N / √3 UCOSφ

16. Fresh iska girma: Lo=nV

17, iskawadata girma: L=Qs/〔Cp*∝*(T1-T2)〕

18. Ikon fan: N1=L1*H1/(102*n1*n2)

19, Power na ruwa famfo: N2 = L2 * H2 * r / (102 * n3 * n4)

20, The bututu diamita: D=√4*1000L2/(π * v)

21, Wurin ruwa: F=a*b*L1/(1000u)