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Common conversion unit table for refrigeration

2018-09-09

Common refrigeration unit conversion table

1.Pressure unit

Pa

(N/㎡)

(kgf/cm²)

bar

atm

(mm·Hg)

Pounds/inch2psi

1

0.102*

10-4

10-5

0.987*

10-5

7.5*10-3

0.145*

10-3

98.07*

103

1

0.9807

0.9678

735.6

14.22

105

1.02

1

0.987

750.1

14.5

1.013*

105

1.033

1.013

1

760

14.7

133.3

1.36*

10-3

1.333*

10-3

1.31*

10-3

1

0.0193

6895

0.0703

0.06895

0.068

51.72

1

 

2.Power & refrigerating ton

kw

HP

kcal/hr

Btu/hr

refrigerating ton

Japanese

mercury column

BTU

1

1.36

860

3412.1

0.259

0.2844

0.2549

0.735

1

632

2510

0.1931

0.2121

0.1901

1.16*

10-3

1.583*

10-3

1

3.968

3.012*

10-4

3.307*

10-4

2.964*

10-4

2.93*

10-4

3.986*

10-4

0.252

1

7.591*

10-5

8.335*

10-5

7.47*

10-5

3.861

5.251

3320

13174

1

1.098

0.9841

3.517

4.783

3024

12000

0.9108

1

0.9864

0.3923

5.335

3373

13384

1.016

1.112

1

 

3.Temperature

 

reduction formula

Convert to Celsius(℃)

5/9(F-32)

K-273.15

Convert to Fahrenheit(F)

9/5*℃+32

F

9/5(K-273.15)+32

Convert to Kelvin(K)

℃+273.15

5/9(F-32)+273.15

K

Note:0℃ convert to Kelvin temperature is 273.16,convert to Fahrenheit is 32F

0K convert to Celsius -273.15℃,convert to Fahrenheit is -459.67F

 

Common units and conversion

1 MW = 1000 KW

 

1 KW=1000 W

 

1 KW=861Kcal/h=0.39 P

 

1 W= 1 J/s

 

0.1MPa=1kg/cm2=10m mercury column =100KPa

 

1 USTR=3024Kcal/h=3517W(冷量)

 

1 BTU=0.252kcal/h=1055J

 

1 BTU/H=0.252kcal/h

 

1 BTU/H=0.2931W

 

1 MTU/H=0.2931KW

 

1 HP(electricity)=0.75KW(electricity

 

1 KW(electricity=1.34HP(electricity

 

1 RT=3.517KW

 

1 KW=0.284RT=860kcal/h=3.412MBH

 

1 P=2200kcal/h=2.56KW

 

1 kcal/h=1.163W

 

1 W=0.86kcal/h

 

F=9/5℃+32

 

℃=(F-32)5/9

 

1 CFM=1.699M³/H=0.4719 l/s

 

1 M³/H=0.5886CFM

 

1 l/s=2.119CFM

 

1 GPM=0.06308 l/s

 

1 l/s=15.85GPM

 

1 kg/cm2=105=10mH2O=1bar=0.1MPa

 

1 Pa=0.1mmH2O=0.0001mH2O

 

1 mH2O=104Pa=10kPa

 

(Thermal value of standard coal) Hc=8.14*103W.h/kg

 

1 MJ=0.034125kg (standard coal) 

 

1 Nm3(natural gas=1.2143kg(standard coal)

 

Common knowledge

1 kcal:1 kg of water temperature rise or fall 1 ℃ under normal atmospheric pressure,The heat absorbed or released is 1 calorie.

 

1 kilogram of ice gets 80 calories

 

The heat of vaporization of 1 kilogram of water is 539 calories

 

4 ℃ water density is the largest

 

EER/COP/IPLV,refrigerating capacity /Ratio of heat output to input power.EER means compressor,COP means system,IPLV means weighted average of energy efficiency under different loads.

 

IPLV=2.3% * A+41.5% * B + 46.1% * C+10.1% * D (weighted average

 

 

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