absorption chiller (2017) Decarbonizing the Cooling ... · Absorption cooling cycle reduces carbon...
Transcript of absorption chiller (2017) Decarbonizing the Cooling ... · Absorption cooling cycle reduces carbon...
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(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
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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/
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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.
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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)
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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
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2nd example; Double-Lift Absorption Chiller(2)(Development history)
2013 : TherMAT project started
2014 : Experimental proof of 60°C driven
cooling (delivering 7°C chilled water)
2015 : 60°C driven Prototype
+ Wide hot water temperature
difference (89-53°C) operation
2016 : Final prototype test (next page)
2017 May : Press release FROM NEDO
Presented at IEA heat pump
conference (Rotterdam)
2018 Mar. :Graduated from TherMAT
2018 : 1st acceptance of order
2019 : 1st shipment
0°C output model became available
5 y
ears
su
pp
ort
by N
ED
O
Capacity: 140kW
Capacity: 10kW
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Single-Effect Double-Lift Absorption Chiller “DXS”The newly developed in “TherMAT” project
According to market research, heat recovery by
wide temperature difference was found to fit market demand.
We have developed “DXS” model with 44°C heat recovery.
TYPE DXS
Cooling capacity kW 176 ~ 4,395
Region EU Asia
Chilled
water
Inlet °C 12 13
Outlet °C 7 8
Cooling
water
Inlet °C 27 31
Outlet °C 33 36.5
Heat source
hot water
Inlet °C 95 95
Outlet °C 51 55
COP (Heat efficiency) 0.72 0.70“50DXS” (Capacity: 176kW)
Specifications
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Example of expected application of “DXS”
Hot water network
Chilled water loopIndustrial
waste heat,
Power plant
Absorption chiller (DXS)Hot water
demand
Gas-enginepower generator
(CHP)
Commercial demand
Low temperature driven absorption chillers “DXS” are expected to
be used in district heat, solar system and distributed energy
systems.
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Temperature enhancement of absorption chillers
Outlet temperature of absorption chillers is now going lower,
thus progress waste heat utilization and reduce electricity.
Refrigeration Cold Storage Air-Conditioning
Outlet Temp.
−5℃ 0℃ 4℃ 7℃
Process of food
product
Developed System Conventional SystemTo be developed…
Commercial
space cooling
“DXS”:
Supplies
4°C chilled
water
“DXS-L”:
Supplies
0°C chilled
water
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Conclusions
Absorption cooling cycle reduces carbon emission by
replacing combustion boilers and electrical chillers.
1) Absorption heat pumps replace combustion boilers
by using some 80~90°C unused heat.
2) Low temperature driven absorption chillers recover
unused heat down to 51°C. This new system was
developed in TherMAT project in 2013-2017.
3) We expect this new chillers to be used for urban hot
water networks especially in summer.
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Thank you for attention…. !
Johnson Controls Building Efficiency Japan
Tatsuo Fujii
30 Oct. 2019Decarbonizing the Cooling: Progress in Heat-Driven Absorption Cooling Cycle
https://www.jci-hitachi.com/jp/products/chillers
http://www.york.com/absorption-chillers