Kawasaki turbo chiller using water as a refrigerant. Feb. 4 th 2015 Kawasaki Heavy Industries, Ltd. Machinery Division Hayato Sakamoto

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1 Kawasaki turbo chiller using water as a refrigerant Feb. 4 th 2015 Kawasaki Heavy Industries, Ltd. Machinery Division Hayato Sakamoto

2 Contents 1. Background 2. Introduction of Kawasaki turbo chiller using water as a refrigerant 3. Actual installation and its performance 4. Estimation of power consumption 5. Summary 2

3 Background Turbo compressors High speed motors Heat exchangers Steam compressor Magnetic bearing High speed turbo blower Kawasaki developed the turbo chiller using water as refrigerant 3

4 Contents 1. Background 2. Introduction of Kawasaki turbo chiller using water as a refrigerant 3. Actual installation and its performance 4. Estimation of power consumption 5. Summary 4

Kawasaki turbo chiller Inverter Control panel Cooling capacity 100USRt (352kW) Rating of motor 110kW Refrigerant R718(water) Chilled Water temp. Cooling Water temp.

5 Kawasaki turbo chiller Inverter Control panel Cooling capacity 100USRt (352kW) Rating of motor 110kW Refrigerant R718(water) Chilled Water temp. Cooling Water temp. Inlet Outlet Inlet Outlet 12 degc 7 degc 30 degc 35 degc Outer casing Motor drive Power supply Inverter 3Ф, 400/440V (50/60Hz) Breaker box Size 2.5m x 2.5m x 2.6m Intended application Air conditioning Compressor, Motor, Evaporator and Condenser are inside the outer casing. 5

speed motor Auxiliary system for oil is not necessary Development of the high

6 Features Zero emission of HFC Development of the core components Optimization of their layout Alternative to existing chillers The compressor is driven by the high speed motor Auxiliary system for oil is not necessary Development of the high efficient compressor under low pressure and high pressure ratio Low power consumption 6

7 Performance n COP 5.1 at 100% Higher at a partial load n Operating range 10%~100% at below 25degC Narrower at over 30 degc n IPLV ARI standard : 8.0 JRA standard : 7.4 Comparable performance to the other turbo chillers 7

8 Contents 1. Background 2. Introduction of Kawasaki turbo chiller using water as a refrigerant 3. Actual installation and its performance 4. Estimation of power consumption 5. Summary 8

Actual installation case n Installed in Kawasaki s Kobe

5,000m 2 Primary chiller : Kawasaki turbo chiller

Units control Cooling tower Primary Kawasaki turbo

9 Actual installation case n Installed in Kawasaki s Kobe works for an air conditioning in 2013 Floor Area : 5,000m 2 Primary chiller : Kawasaki turbo chiller 100USRt 1unit Secondary chiller : Absorption chiller 120USRt 1unit n Confirmation Items : 1. Chilled water temp. control 2. Units control Cooling tower Primary Kawasaki turbo chiller Secondary Absorption chiller No.1 Stand-by Absorption chiller No.2 Office building AH AH AH AH Tank 9

3 degc Units control : performed without problem (chilled water

10 Performance at actual operations Absorption chiller is operated. Temp. control : controlled within 7.0±0.3 degc Units control : performed without problem (chilled water controlled within 7.0±0.5 degc) Accumulated time : 2,400 hours (operated since 2013 summer) 10

11 Contents 1. Background 2. Introduction of Kawasaki turbo chiller using water as a refrigerant 3. Actual installation and its performance 4. Estimation of power consumption 5. Summary 11

12 Calculation conditions Power consumption has been estimated in the case of a replacement n Weather data : Statistical data from Japan Meteorological Agency n Operating hours : 240 hours/month 12

13 Estimation of power consumption 0.70 kg-co 2 /kwh Power consumption would be reduced by 30% 13

14 Contents 1. Background 2. Introduction of Kawasaki turbo chiller using water as a refrigerant 3. Actual installation and its performance 4. Estimation of power consumption 5. Summary 14

15 Summary n Introduction of Kawasaki turbo chiller using water as a refrigerant l Features and performance n Actual installation l Chilled water temp. is controlled within 7±0.3degC. l Units control performs properly n Estimation of power consumption l Power consumption could be reduced by replacing a HFC chiller with Kawasaki turbo chiller 15

16 16

17 IPLV n ARI IPLV = 0.01A+0.42B+0.45C+0.12D Load Cooling water temp. A 100 % 29.4degC B 75 % 23.9degC C 50 % 18.3degC D 25 % 18.3degC IPLV = 8.0 n JRA IPLV = 0.01A+0.47B+0.37C+0.15D Load Cooling water temp. A 100 % 32.0degC B 75 % 27.5degC C 50 % 23.0degC D 25 % 18.5degC IPLV =

First Domestic High-Efficiency Centrifugal Chiller with Magnetic Bearings: The ETI-MB Series

82 First Domestic High-Efficiency Centrifugal Chiller with Magnetic Bearings: The ETI-MB Series KENJI UEDA *1 YASUSHI HASEGAWA *2 NAOKI YAWATA *2 AKIMASA YOKOYAMA *2 YOSUKE MUKAI *3 The efficiency and