Experimental analysis of a novel concept of a “thermally driven” solution pump operating a small-capacity ammonia/water absorption heat pumping system

2015 ◽  
Vol 60 ◽  
pp. 190-205 ◽  
Author(s):  
Gerald Zotter ◽  
René Rieberer
Keyword(s):  
Water Absorption ◽  
Experimental Analysis ◽  
Ammonia Water ◽  
Pumping System ◽  
Thermally Driven ◽  
Novel Concept ◽  
Small Capacity ◽  
Heat Pumping

Experimental evaluation of a small-capacity, waste-heat driven ammonia-water absorption chiller

2017 ◽  
Vol 79 ◽  
pp. 89-100 ◽  
Author(s):  
Anurag Goyal ◽  
Marcel A. Staedter ◽  
Dhruv C. Hoysall ◽  
Mikko J. Ponkala ◽  
Srinivas Garimella
Keyword(s):  
Water Absorption ◽  
Experimental Evaluation ◽  
Waste Heat ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Small Capacity

scholarly journals Thermodynamic and Experimental Analysis of an Ammonia-Water Absorption Chiller

2010 ◽  
Vol 02 (04) ◽  
pp. 298-305 ◽  
Author(s):  
Dingfeng Kong ◽  
Jianhua Liu ◽  
Liang Zhang ◽  
Hang He ◽  
Zhiyun Fang
Keyword(s):  
Water Absorption ◽  
Experimental Analysis ◽  
Absorption Chiller ◽  
Ammonia Water

Dynamic model for a small-capacity ammonia–water absorption chiller

2013 ◽  
Vol 19 (7) ◽  
pp. 865-881 ◽  
Author(s):  
Vinodh K. Viswanathan ◽  
Alexander S. Rattner ◽  
Matthew D. Determan ◽  
Srinivas Garimella
Keyword(s):  
Water Absorption ◽  
Dynamic Model ◽  
Absorption Chiller ◽  
Ammonia Water ◽  
Small Capacity

scholarly journals Identification of Existing Challenges and Future Trends for the Utilization of Ammonia-Water Absorption–Compression Heat Pumps at High Temperature Operation

2021 ◽  
Vol 11 (10) ◽  
pp. 4635
Author(s):  
Marcel Ulrich Ahrens ◽  
Maximilian Loth ◽  
Ignat Tolstorebrov ◽  
Armin Hafner ◽  
Stephan Kabelac ◽  
...  
Keyword(s):  
High Temperature ◽  
Water Absorption ◽  
Industrial Sector ◽  
Heat Pumps ◽  
Working Fluid ◽  
Large Temperature ◽  
Future Trends ◽  
Ammonia Water ◽  
Starting Point ◽  
High Temperature Operation

Decarbonization of the industrial sector is one of the most important keys to reducing global warming. Energy demands and associated emissions in the industrial sector are continuously increasing. The utilization of high temperature heat pumps (HTHPs) operating with natural fluids presents an environmentally friendly solution with great potential to increase energy efficiency and reduce emissions in industrial processes. Ammonia-water absorption–compression heat pumps (ACHPs) combine the technologies of an absorption and vapor compression heat pump using a zeotropic mixture of ammonia and water as working fluid. The given characteristics, such as the ability to achieve high sink temperatures with comparably large temperature lifts and high coefficient of performance (COP) make the ACHP interesting for utilization in various industrial high temperature applications. This work reviews the state of technology and identifies existing challenges based on conducted experimental investigations. In this context, 23 references with capacities ranging from 1.4 kW to 4500 kW are evaluated, achieving sink outlet temperatures from 45 °C to 115 °C and COPs from 1.4 to 11.3. Existing challenges are identified for the compressor concerning discharge temperature and lubrication, for the absorber and desorber design for operation and liquid–vapor mixing and distribution and the choice of solution pump. Recent developments and promising solutions are then highlighted and presented in a comprehensive overview. Finally, future trends for further studies are discussed. The purpose of this study is to serve as a starting point for further research by connecting theoretical approaches, possible solutions and experimental results as a resource for further developments of ammonia-water ACHP systems at high temperature operation.

Thermodynamic analysis of triple effect ammonia–water absorption compression (hybrid) cycle

2021 ◽  
pp. 095440892199568
Author(s):  
CP Jawahar
Keyword(s):  
Water Absorption ◽  
Energy Analysis ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Performance Parameters ◽  
Evaporator Temperature ◽  
Ammonia Water ◽  
Absorption Cycle ◽  
Hybrid Cycle

This paper presents the energy analysis of a triple effect absorption compression (hybrid) cycle employing ammonia water as working fluid. The performance parameters such as cooling capacity and coefficient of performance of the hybrid cycle is analyzed by varying the temperature of evaporator from −10 °C to 10 °C, absorber and condenser temperatures in first stage from 25 °C to 45 °C, degassing width in both the stages from 0.02 to 0.12 and is compared with the conventional triple effect absorption cycle. The results of the analysis show that the maximum cooling capacity attained in the hybrid cycle is 472.3 kW, at 10 °C evaporator temperature and first stage degassing width of 0.12. The coefficient of performance of the hybrid cycle is about 30 to 65% more than the coefficient of performance of conventional triple effect cycle.

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