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A comparative thermodynamic study of sorption systems: second law analysis.
Author(s) : MEUNIER F., KAUSHIK S. C., NEVEU P., POYELLE F.
Type of article: Article, IJR article
Summary
As a consequence of the phasing out of CFCs, sorption systems appear to be potential candidates to replace vapour compression systems. Amongst sorption systems there exists a choice between several systems, such as liquid absorption, solid adsorption and chemical reaction heat pumps. Nevertheless, few comparative studies between these systems have been undertaken so far. The paper presents such a study based on combined first and second law thermodynamical analysis of the different cycles. Simple entropy generation processes explain why the basic cycles for these systems yield performances much lower than the Carnot efficiency. The possibility of operating regenerative cycles with internal heat recovery and higher efficiencies is also considered for typical common base conditions. Different entropy generation considerations are visualised, such as thermal coupling (external/internal), non-uniform temperature component entropy production and other irreversible processes for the COP degradation in these systems. It is found that thermal coupling irreversibilities in solid sorption systems and other internal irreversibilities in liquid sorption systems with solution heat exchanger are dominant in the actual COP degradation with respect to the reversible Carnot COP.
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Pages: 414-421
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Details
- Original title: A comparative thermodynamic study of sorption systems: second law analysis.
- Record ID : 1998-0870
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 19 - n. 6
- Publication date: 1996/07
Links
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Indexing
- Themes: Absorption and adsorption systems
- Keywords: Thermodynamics; Absorption system; Adsorption system; Heat pump; Entropy; COP
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- Author(s) : CHUA H. T., GORDON J. M., NG K. C., HAN Q.
- Date : 1997/05
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 20 - n. 3
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Second law analysis of a novel cycle concept fo...
- Author(s) : SCHWAMBERGER V., JOSHI C., SCHMIDT F. P.
- Date : 2011/04/06
- Languages : English
- Source: Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
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Equivalent Carnot cycles for sorption refrigera...
- Author(s) : MEUNIER F., NEVEU P., CASTAING-LASVIGNOTTES J.
- Date : 1998/09
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 21 - n. 6
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Adsorptive machines with advances cycles for he...
- Author(s) : PONS M., POYELLE F.
- Date : 1999/01
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- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 1
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Analysis of the adsorption cycles with thermal ...
- Author(s) : PONS M.
- Date : 1997/07
- Languages : English
- Source: Applied Thermal Engineering - vol. 17 - n. 7
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