Foomka Xisaabinta HVAC

I, Heerkulka:

Celsius (C) iyo Fahrenheit (F)

Fahrenheit = 32 + Celsius × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) iyo Celsius (C)

Kelvin (K) = Celsius (C) +273.15

II, Beddelka Cadaadiska:

Mpa,Kpa,pa,bar

1Mpa=1000Kpa;

1Kpa=1000pa;

1Mpa=10bar;

1bar=0.1Mpa=100Kpa;

1 atmospher=101.325Kpa=1bar=1kilo;

1 bar = 14.5psi;

1psi=6.895Kpa;

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

1 Pa=0.1 mmH2O=0.0001mH2O

1 mH2O=104 Pa=10 kPa

III, Xawaaraha dabaysha, beddelka mugga

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, Awoodda qaboojinta iyo awoodda:

1KW=1000 W

1KW=861Kcal/h=0.39P (awoodda qaboojinta)

1W= 1 J/s

1USTR=3024Kcal/h=3517W (awoodda qaboojinta)

1BTU=0.252kcal/h=1055J

1BTU/H=0.252kcal/h

1BTU/H=0.2931W (awoodda qaboojinta)

1MTU/H=0.2931KW (awoodda qaboojinta)

1HP (koronto) = 0.75KW (koronto)

1KW (koronto) = 1.34HP (koronto)

1RT (awoodda qaboojinta) = 3.517KW (awoodda qaboojinta)

1KW (awoodda qaboojinta)=3.412MBH

1P (awoodda qaboojinta)=2200kcal/h=2.56KW

1kcal/h=1.163W

V,Qaboojiyahadhumucda rakibaadda iyo awoodda qaboojinta:

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, qaacidada xisaabinta qaboojiyaha:

1, Doorashada waalka ballaarinta: ton qabow + 1.25% gunnada

2. Awoodda cadaadiska: 1P = 0.735kW

3. Qiimaha qaboojiyaha: Awoodda qaboojinta (KW) ÷3.516 x 0.58

4, socodka biyaha ee qaboojiyaha hawada: Awoodda qaboojinta (KW) ÷ farqiga heerkulka ÷ 1.163

5

6, qaboojinta heerka socodka biyaha ee mashiinka qubeyska biyaha qaboojiyeyawoodda qaboojinta KW+ awoodda saxaafadda) ×0.86÷ farqiga heerkulka

7. Qiimaha kululaynta guud QT=QS+QL

8, qaboojinta hawada: QT = 0.24 * ∝ * L * (h1-h2)

9

10, Kulaylka qarsoon ee qaboojinta hawada: QL=600*∝*L*(W1-W2)

11,Biyo qaboojinmugga：L/sV1= Q1/(4.187△T1)

12. Mugga biyaha qaboojinta *TR

13COP= Awoodda qaboojiyaha (KW) / isticmaalka tamarta (KW)

14

15. Culeys buuxa oo hadda ah (saddex weji)

16. Mugga hawada cusub: Lo=nV

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

18,Awoodda marawaxada:N1=L1*H1/(102*n1*n2)

19. Awooda bamka biyaha: N2= L2*H2*r/(102*n3*n4)

20, Dhexroorka tuubada:D=√4*1000L2/(π*v)

21, Aagga tuubada: F=a*b*L1/(1000u)