If you can read this Click on the icon to choose a picture or Reset the slide. To Reset: Right click on the slide thumbnail and select ‘reset slide’ or choose the ‘Reset’ button on the ‘Home’ ribbon (next to the font choice box) If you can read this Click on the icon to choose a picture or Reset the slide. To Reset: Right click on the slide thumbnail and select ‘reset slide’ or choose the ‘Reset’ button on the ‘Home’ ribbon (next to the font choice box) (C)2019 Johnson Controls Building Efficiency Japan German-Japanese Environment and Energy Dialogue Forum (29/30 October 2019, Tokyo) 30 October 2019 Johnson Controls Building Efficiency Japan Tatsuo Fujii Decarbonizing the Cooling: Progress in Heat-Driven Absorption Cooling Cycle Absorption heat pump (2006) Low-temp. driven absorption chiller (2017)
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absorption chiller (2017) Decarbonizing the Cooling ... · Absorption cooling cycle reduces carbon emission by replacing combustion boilers and electrical chillers. 1) Absorption
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If you can read this
Click on the icon
to choose a
picture or
Reset the slide.
To Reset: Right click on the
slide thumbnail and select
‘reset slide’ or choose the
‘Reset’ button on the ‘Home’
ribbon (next to the font
choice box)
If you can read this
Click on the icon
to choose a
picture or
Reset the slide.
To Reset: Right click on the
slide thumbnail and select
‘reset slide’ or choose the
‘Reset’ button on the ‘Home’
ribbon (next to the font
choice box)
(C)2019 Johnson Controls Building Efficiency Japan
German-Japanese Environment and Energy Dialogue Forum (29/30 October 2019, Tokyo)
30 October 2019
Johnson Controls Building Efficiency Japan
Tatsuo Fujii
Decarbonizing the Cooling: Progress in Heat-Driven Absorption Cooling Cycle
Absorption heat pump (2006)Low-temp. driven
absorption chiller (2017)
2 (C)2019 Johnson Controls Building Efficiency Japan2
Contents 目次
1.Introduction
2.1st example; Absorption Heat pump
3.2nd example; Double-Lift Absorption Chiller
4.Temperature enhancement of absorption chillers
5.Conclusions
3 (C)2019 Johnson Controls Building Efficiency Japan
Summary of Absorption Cooling Cycle
Absorption Chiller
Chilled water
Electrical Chiller
Chilled water
Electricity
Fossil Fuel
Waste Heat
Absorption chillers use Heat as their driving energy,
in contrast to electrical (vapour compression) chillers.
(Heat driven)
M
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How can we reduce carbon by absorption heat pumps and chillers ?
A) Replace combustion boiler with absorption heat pump
B) Replace electrical chiller with heat-driven absorption chiller
Replace Flashtank
137°C
133°C
Steam
Absorption heat pump
Fossil
fuel 90°C
Power plantElectricity
Combustion boiler
Absorption chiller
90°C
Chilled waterReplace
Heat source
Heat source
CO2
emission
CO2
emission
M
Chilled water
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Target sector of Absorption Cooling Cycle
Considering its capacity, we set the target sector as;
A) Industrial sector
B) Commercial sector
A: Waste heat from production process
B: Waste heat from distributed micro power plants, etc.
http://www.thermat.jp/english/
6 (C)2019 Johnson Controls Building Efficiency Japan
1st example; Absorption Heat pump (1)
Absorption Heat pump for Alcohol Distillery
Specification
Absorption Heat Pump
(Temperature boost type)
Item Attribution
2,475kW
107°C / 112°C
Heat. capacity
Hot water *
Cooling water * 25°C/ 30.5°C
Heat source 78°C EtOH
Electricity 24kW
Efficiency(COP) 0.45
* Inlet / outlet
Available Capacity:
150kW~6000kW
Estimated decarbonizing is 13,000 tons of CO2 / year.
7 (C)2019 Johnson Controls Building Efficiency Japan
1st example; Absorption Heat pump (2)
System flow of the Alcohol Distillery with Absorption Heat Pump
Absorption Heat pump
(Output: 2,475 kW)
Material
(Alcohol)
112°C
107°C
Rectifying columns
Steam
Cooling
waterEthanol vapor (78°C)
25°C
30.5°C
Next
process 112°C
(Heat source)
8 (C)2019 Johnson Controls Building Efficiency Japan
2nd example; Double-Lift Absorption Chiller(1)(Development as a member of “TherMAT”)
Toward utilizing lower temperature unused heat.
Current status of driving temperature of absorption chillers
Hot Water Driven
Absorption Chiller
Temp.: 70°C 90°C 120°C 150°C 180°C~
Direct fired Absorption
Chiller/Heater
Steam Driven
Absorption Chiller
High temp. drivenLow temp. driven
Target
temperature
range
(75°C)
Lower temperature
heat source
9 (C)2019 Johnson Controls Building Efficiency Japan