Tātai Tātai HVAC

Ahau, Te pāmahana:

Celsius (C) me Fahrenheit (F)

Fahrenheit = 32 + Celsius × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) me te Celsius (C)

Kelvin (K) = Celsius (C) +273.15

II, te hurihanga pehanga:

Mpa, Kpa, pa, pae

1Mpa=1000Kpa；

1Kpa=1000pa；

1Mpa=10pa;

1 pae=0.1Mpa=100Kpa;

1te rangi=101.325Kpa=1pa=1Kilogram;

1 pae=14.5psi；

1psi=6.895Kpa；

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

1 Pa=0.1 mmH2O=0.0001 mH2O

1 mH2O=104 Pa=10 kPa

III, Tere hau, huringa rōrahi

1CFM =1.699 M³/H=0.4719 l/s

1M³/H=0.5886CFM

1l/s=2.119CFM

1FPM=0.3048 m/mene=0.00508 m/s

IV, te kaha whakamahana me te kaha:

1KW=1000 W

1KW=861Kcal/h=0.39 P(te kaha whakamatao)

1W= 1 J/s

1USTR=3024Kcal/h=3517W(te kaha whakamatao)

1BTU=0.252kcal/h=1055J

1BTU/H=0.252kcal/h

1BTU/H=0.2931W(te kaha whakamatao)

1MTU/H=0.2931KW(kaha whakamatao)

1HP（hiko）=0.75KW（hiko）

1KW（hiko）=1.34HP（hiko）

1RT(kaha whakamatao)=3.517KW(kaha whakamatao)

1KW(te kaha whakamatao）=3.412MBH

1P(kaha whakamatao）=2200kcal/h=2.56KW

1kcal/h=1.163W

V,Whakarererangimatotoru whakaurunga me te kaha whakamatao:

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, tātai tātai Refrigerant:

1, Te kowhiringa o te roera roha: tone makariri + 1.25% tahua

2, Mana Perehi: 1P = 0.735kW

3、Te utu whakamatao: Te kaha whakamahana (KW) ÷3.516 x 0.58

4、Te rere wai o te whakamatao hau: Te kaha whakamahana (KW) ÷ te rereketanga o te pāmahana ÷1.163

5、Te rere wai whakamatao o te miihini wiri whakamatao wai: Te kaha whakamahana (KW) ×0.86÷ te rereketanga o te pāmahana

6、Ko te tere o te rere o te wai whakamahana o te miihini wiri whakamahana waikaha whakamataoKW+ mana perehi) ×0.86÷ rerekētanga pāmahana

7, Uara whakawera kerekere QT=QS+QL

8、Ai whakamahana: QT =0.24*∝*L*(h1-h2)

9, Te whakamahana hau wera nui: QS=Cp*∝*L*(T1-T2)

10, Te wera huna o te whakamahana hau: QL=600*∝*L*(W1-W2)

11,Te wai mītirōrahi：L/sV1= Q1/(4.187△T1)

12, rōrahi wai whakamatao:L/sV2=Q2/(4.187△T2)=(3.516+KW/TR)TR，Q2=Q1+N=TR*3.516+KW/TR*TR=（3.516+KW/TR） *TR

13、Te pai o te whakamahana: EER= Te kaha o te whakamatao (Mbtu/h)/te kaha o te hiko (KW);COP= Te kaha whakamatao (KW)/kohi hiko (KW)

14 、Mahinga kawenga whakamahana wahanga: NPLV=1/(0.01/A+0.42/B+0.45/C+0.12/D)

15 、Katoa o naianei (e toru nga wahanga):FLA=N/√3 UCOSφ

16, rōrahi hau hou: Lo=nV

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

18, Mana o te powhiriwhiri: N1=L1*H1/(102*n1*n2)

19, Mana o te papu wai: N2= L2*H2*r/(102*n3*n4)

20、Ko te diameter paipa:D=√4*1000L2/(π*v)

21 、Rongoitanga: F=a*b*L1/(1000u)