离心式冷水机组变频调速的原理及应用

100%

1979

150

1100

50

Johnson

&Johnson, Rockwell, IBM, EI DuPont, 3M, Honeywell

1

2.

1.

ARI

1

BHP=FLOW*HEAD/EFF

BHPHEADEFF

1

23.

3

N1=60F1/P F1———

1-SS=

1.35U

F1

100 72.9 51.2 34.3

4.

100%

a

bb-c660.2KW/610080Load ------------Load10080Load ------------Load10080LoadLoad7 Fig.7 the effect of ECWT on chiller performanceYORKVSDYORK3YKEBEBH55CPE

ECWT4 F

O

kw/ton

1/N0.4-0.5

40

YKEBEBH55CPEO

365

5

kw/ton

VSD

VSD

a

36.35

1

3

c

24.5

VSD

VSD

VSD

VSD

99.9%

4

VSDVSD0.9IEEE519-923. VSD24 load cap. ECWT 100 90 80 70 60 50 40Dry-bulb Temperature Bins( F)6000480420360300240180120.684.779.874.869.6 65 65 65 650.6680.6180.5880.5740.5750.5390.60.7330.9040.6710.50.5210.4490.3810.3280.3370.408 0.5 -4.5 4.912.927.850.9.391.779.780.9.9% 30 20 Fig. 9 Weather data of WashingtonTab.2 Energy Savings According to ARI550/5905hrsECWT(F)Loadavg10kwh-kwhFig.10 inrush current comparison VSD/ star-delt starter4tab.4 analysis of energy consumption for three chillers systemYORKkw/ton .5 85.8 77.2 68 600 0 0 360 0.667 0.627 0.568 0.568 600 0 0 360hrkwh0.667 600 0.667 775 930465.000.627 0 0.627 19830.5680.568 2708 2987 2014212.42 1661195.52 1221563.52 57.7 300 0.569 215 36700.50 8668 58136.96 b)3X600RT(YKEBEBH55CPEO) 2kw/tonhrkwh100% LRA 200-300%FLA42%LRA45%LRA1Variable speed drive for centrifugal chillers.Form:160.00- CD9(799)2New ARI rating allows more accurate chiller energyspecification. Form:160.00-PM22(1298)3Variable speed drives centrifugal liquid chillers.Form:160.05- O1(1087)4Waterchilling packages using the vapor compressioncycle. ARI Standard 550/590-986APEC