Ib daim ntawv teev tag nrho cov qauv siv tub yees txias!

1. Kev hloov pauv ntawm qhov kub thiab txias

Pib nrog qhov yooj yim ua ntej kub hloov pauv

Celsius (C) thiab Fahrenheit (F)

Fahrenheit = 32 + Celsius × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) thiab Celsius (C)

Kelvin kub (K) = degrees Celsius (C) +273.15

02, hloov siab

Mpa, Kpa, pa, bar

1Mpa = 1000Kpa;

1Kpa = 1000pa;

1Mpa = 10bar;

1bar = 0.1Mpa = 100Kpa;

1 atmospheric siab = 101.325Kpa = 1bar = 1kg;

bar, KPA, PSI

1bar = 14.5psi;

1psi = 6.895Kpa;

mH2O

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

1 Pa = 0.1 mmH2O = 0.0001 mH2O

1 mH2O=104 Pa=10 kPa

03. Hloov pauv cua nrawm thiab ntim

1 CFM (cubic feet per minute)=1.699 M³/H=0.4719 l/s

1 M³/H=0.5886CFM (cubic feet/minute)

1 l/s=2.119CFM (cubic feet per minute)

1 fpm (ko taw ib feeb) = 0.3048 m/min = 0.00508 m/s

04. Txias peev xwm thiab lub zog

1 KW = 1000 W

1 KW = 861Kcal/h (kcal) = 0.39 P (txias peev xwm)

1 W = 1 J/s (Tso dag/sec)

1 USTR (Asmeskas txias tuj) = 3024Kcal/h = 3517W (txias peev xwm)

1 BTU (British thermal unit) = 0.252kcal/h = 1055J

1 BTU/H (British chav ntsuas cua sov/teev) = 0.252kcal/h

1 BTU/H (Chav ntsuas cua sov hauv tebchaws Askiv/teev) = 0.2931W (txias peev xwm)

1 MTU/H (txhiab British cov chav sov/teev) = 0.2931KW (txias peev xwm)

1 HP (hluav taws xob) = 0.75KW (hluav taws xob)

1 KW (hluav taws xob) = 1.34HP (hluav taws xob)

1 RT (cold capacity)=3.517KW (cold capacity)

1 KW (lub peev xwm txias) = ​​3.412MBH (103 Cov cua sov hauv tebchaws Askiv/teev)

1 P (txias peev xwm) = 2200kcal/h = 2.56KW

1 kcal/h = 1.163 W

05, formula xam yooj yim

1. Xaiv qhov nthuav dav valve: txias tuj + 1.25% npoo

2. Nias lub zog: 1P = 0.735KW

3. Cov tub yees txias: txias txias (KW) ÷ 3.516 × 0.58

4. Dej ntws ntawm lub tshuab cua txias: lub peev xwm txias (KW) ÷ qhov kub sib txawv ÷ 1.163

5. Cov dej txias ntws ntawm cov dej txias txias ntsia hlau tshuab: txias peev xwm (KW) × 0.86 ÷ qhov sib txawv kub

6. Txias dej ntws ntawm cov dej txias txias ntsia hlau tshuab: (txias peev xwm KW + lub zog compressor) × 0.86 ÷ qhov sib txawv kub

06. Kab tuab thiab txias peev xwm

Mm 1.5mm2 yog 12A-20A (2650 ~ 4500W)

★ 2.5mm2 yog 20-25A (4500 ~ 5500W)

★ 4 mm2 is 25-32A (5500~7500W)

★ 6 mm2 is 32-40A (7500~8500W)