Mndandanda wathunthu wamafomu wamba owerengera mufiriji!

1. Kutembenuka kwa kutentha

Yambani ndi kusintha kosavuta koyamba kutentha

Celsius (C) ndi Fahrenheit (F)

Fahrenheit = 32 + Celsius × 1.8

Celsius = (Fahrenheit -32) /1.8

Kelvin (K) ndi Celsius (C)

Kutentha kwa Kelvin (K) = madigiri Celsius (C) +273.15

02, kuthamanga kutembenuka

Mpa, Kpa, pa, bala

1Mpa = 1000Kpa;

1Kpa = 1000pa;

1Mpa = 10bar;

1bar = 0.1Mpa = 100Kpa;

Kuthamanga kwazungulira 1 = 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. Kutembenuka kwa kuthamanga kwa mphepo ndi voliyumu

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

1 M³ / H = 0.5886CFM (masentimita / mphindi)

1 l / s = 2.119CFM (cubic feet pamphindi)

1 fpm (mapazi pamphindi) = 0.3048 m / min = 0.00508 m / s

04. Mphamvu yozizira ndi mphamvu

1 KW = 1000 W

1 KW = 861Kcal / h (kcal) = 0.39 P (mphamvu yozizira)

1 W = 1 J / s (Nthabwala / gawo)

1 USTR (toni yozizira yaku US) = 3024Kcal / h = 3517W (mphamvu yozizira)

1 BTU (Britain matenthedwe) = 0.252kcal / h = 1055J

1 BTU / H (matenthedwe aku Britain / ola limodzi) = 0.252kcal / h

1 BTU / H (matenthedwe aku Britain / ola limodzi) = 0.2931W (mphamvu yozizira)

1 MTU / H (zikwizikwi zamafuta aku Britain / ola) = 0.2931KW (mphamvu yozizira)

1 HP (magetsi) = 0.75KW (magetsi)

1 KW (magetsi) = 1.34HP (magetsi)

1 RT (mphamvu yozizira) = 3.517KW (mphamvu yozizira)

1 KW (mphamvu yozizira) = 3.412MBH (103 matenthedwe aku Britain / ola)

1 P (mphamvu yozizira) = 2200kcal / h = 2.56KW

1 kcal / h = 1.163W

05, njira yowerengera yosavuta

1. Kusankhidwa kwa valavu yowonjezera: ozizira tani + 1.25% margin

2. Press mphamvu: 1P = 0.735KW

3.Chotengera cha firiji: mphamvu yozizira (KW) ÷ 3.516 × 0.58

4. Kutuluka kwamadzi kwa makina otentha ndi mpweya: mphamvu yozizira (KW), kusiyana kwa kutentha ÷ 1.163

5. Kutentha kwamadzi ozizira kwamakina ozizira madzi: kuzirala kwa mphamvu (KW) × 0.86 ÷ kusiyana kwakutentha

6. Kutuluka kwamadzi kozizira kwamakina otsekemera ndi madzi: (kutentha mphamvu KW + mphamvu ya kompresa) × 0.86 ÷ kusiyana kwa kutentha

06. Mzere makulidwe ndi kuzirala

★ 1.5mm2 ndi 12A-20A (2650 ~ 4500W)

★ 2.5mm2 ndi 20-25A (4500 ~ 5500W)

★ 4 mm2 ndi 25-32A (5500 ~ 7500W)

★ 6 mm2 ndi 32-40A (7500 ~ 8500W)