Low temperature energy powering an absorption chiller will make more energy sources available for comfort cooling as compared to conventional heat driven chillers. Solar energy, industrial waste heat and heat from combined power and heat generation are examples of sources for driving energy. Also, the distribution of energy for comfort cooling could be made efficiently by transportation of hot water to the chiller situated near to the customers. Absorption chillers driven by temperatures lower than 90°C (194°F) are in general not available as an “off-the-shelf product.” Usually the low temperature driven chillers are custom made to fit to the local conditions with respect to temperatures of the driving energy and of the cooling water. The optimal design of a chiller is dependant on the temperature of the driving energy as well as on the temperature of the available heat sink for cooling the absorber and the condenser. A scheme for optimization of the chiller with respect to the size of the heat transfer surfaces and of the temperature drop of the driving energy and of the cooling water is presented herein. Presented results illustrate the dramatic effect on the size of the absorber by changing the cooling water temperature, and the equally dramatic effect on the size of the condenser and generator by changing the temperature of the driving energy. Clearly, lowering the heat source temperature and/or increasing the heat sink temperature increases the capital cost for a chiller. However, when coupled to combined heat and power generation, reasonable pay-back times have here been demonstrated for low temperature driven absorption chillers due to the increased electricity production in the overall system.
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ASME 2004 International Mechanical Engineering Congress and Exposition
November 13–19, 2004
Anaheim, California, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
0-7918-4701-2
PROCEEDINGS PAPER
Feasibility Study of Absorption Chillers With a Low Temperature Heat Source
Viktoria Martin,
Viktoria Martin
KTH-Royal Institute of Technology
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Fredrik Setterwall
Fredrik Setterwall
Fredrik Setterwall Konsult AB
Search for other works by this author on:
Viktoria Martin
KTH-Royal Institute of Technology
Fredrik Setterwall
Fredrik Setterwall Konsult AB
Paper No:
IMECE2004-60781, pp. 461-467; 7 pages
Published Online:
March 24, 2008
Citation
Martin, V, & Setterwall, F. "Feasibility Study of Absorption Chillers With a Low Temperature Heat Source." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Advanced Energy Systems. Anaheim, California, USA. November 13–19, 2004. pp. 461-467. ASME. https://doi.org/10.1115/IMECE2004-60781
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