川本斯特
制冷空调工程师常用的单位换算表
发布日期:2019-12-05 21:54:54

常用单位以及换算:

1 MW(兆瓦)=1000 KW(千瓦)

1 KW=1000 W

1 KW=861Kcal/h(大卡)=0.39 P(冷量)

1 W= 1 J/s(焦/秒)

0.1MPa=1公斤/厘米2=10米水柱=100KPa

1 USTR(美国冷吨)=3024Kcal/h=3517W(冷量)

1 BTU(英热单位)=0.252kcal/h=1055J

1 BTU/H(英热单位/小时)=0.252kcal/h

1 BTU/H(英热单位/小时)=0.2931W(冷量)

1 MTU/H(千英热单位/小时)=0.2931KW(冷量)

1 HP(电)=0.75KW(电)

1 KW(电)=1.34HP(电)

1 RT(冷量)=3.517KW(冷量)

1 KW(冷量)=0.284RT=860kcal/h=3.412MBH(103英热单位/小时)

1 P(冷量)=2200kcal/h=2.56KW

1 kcal/h=1.163W

1 W=0.86kcal/h

F(华氏度)=9/5℃+32

℃(摄氏度)=(F-32)5/9

1 CFM(立方英尺/分钟)=1.699M³/H=0.4719 l/s

1 M³/H=0.5886CFM(立方英尺/分钟)

1 l/s=2.119CFM(立方英尺/分钟)

1 GPM(加仑/分钟)=0.06308 l/s

1 l/s=15.85GPM(加仑/分钟)

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

1 Pa=0.1mmH2O=0.0001mH2O

1 mH2O=104Pa=10kPa

标准煤热值Hc=8.14*103W.h/kg

1 MJ(热量)=0.034125kg标准煤

1 Nm3(天然气)=1.2143kg标准煤


那些暖通工程师不得不知道的知识:


1kcal(大卡):标准大气压下1公斤水温度上升或下降1℃,所吸收或者释放的热量就是1大卡。

1公斤冰的相变热为80大卡

1公斤的汽化热为539大卡

4℃的水密度最大

EER/COP/IPLV,制冷量/制热量与输入功率的比值。EER指的是压缩机,COP指的是系统,IPLV不同负荷下能效的加权平均值。

IPLV=2.3% * A+41.5% * B + 46.1% * C+10.1% * D (加权平均值)

制冷常用单位换算表:

1.jpg2.jpg3.jpg



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