This study deals with the performance analysis of single- and multi-stage adsorption cooling cycles working at partial vacuum and pressurized conditions for cooling applications. Four adsorbent-refrigerant pairs namely activated carbon fiber-ethanol, silica gel-water, Maxsorb II-R134a and Fluka-R134a pairs have been investigated. The former two pairs are deemed to be suitable for adsorption cycles working at pressures ranging from 1 to 11 kPa while the latter two are suitable for those working at above atmospheric pressure conditions typically between about 0.3 and 0.8 MPa. Invoking the adsorption isotherms of the assorted pairs, the pressure-temperature-concentration (P-T-W) diagrams have been presented. Pertaining a thermodynamic framework, the performance of both single- and multi-stage cycles in terms of specific cooling effect (SCE) and coefficient of performance (COP) has also been studied. Theoretical results show that the former two pairs i.e., the adsorption cycles working at partial vacuum pressures are suitable for surface cooling while latter two are suitable for micro cooling applications. Moreover, the multi-stage adsorption cycles can be operational at a heat source temperature below about 55°C, a region that could not be reached by any conventional adsorption cycle.
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ASME 2008 International Mechanical Engineering Congress and Exposition
October 31–November 6, 2008
Boston, Massachusetts, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4869-2
PROCEEDINGS PAPER
Study on Single- and Multi-Stage Adsorption Cooling Cycles Working at Sub and Above Atmospheric Conditions
Bidyut B. Saha,
Bidyut B. Saha
Kyushu University, Kasuga-Shi, Fukuoka, Japan
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Ibrahim I. El-Sharkawy,
Ibrahim I. El-Sharkawy
Kyushu University, Kasuga-Shi, Fukuoka, Japan
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Anutosh Chakraborty,
Anutosh Chakraborty
Kyushu University, Kasuga-Shi, Fukuoka, Japan
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Shigeru Koyama,
Shigeru Koyama
Kyushu University, Kasuga-Shi, Fukuoka, Japan
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Kim Choon Ng
Kim Choon Ng
National University of Singapore, Singapore
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Bidyut B. Saha
Kyushu University, Kasuga-Shi, Fukuoka, Japan
Ibrahim I. El-Sharkawy
Kyushu University, Kasuga-Shi, Fukuoka, Japan
Anutosh Chakraborty
Kyushu University, Kasuga-Shi, Fukuoka, Japan
Shigeru Koyama
Kyushu University, Kasuga-Shi, Fukuoka, Japan
Kim Choon Ng
National University of Singapore, Singapore
Paper No:
IMECE2008-68616, pp. 563-570; 8 pages
Published Online:
August 26, 2009
Citation
Saha, BB, El-Sharkawy, II, Chakraborty, A, Koyama, S, & Ng, KC. "Study on Single- and Multi-Stage Adsorption Cooling Cycles Working at Sub and Above Atmospheric Conditions." Proceedings of the ASME 2008 International Mechanical Engineering Congress and Exposition. Volume 8: Energy Systems: Analysis, Thermodynamics and Sustainability; Sustainable Products and Processes. Boston, Massachusetts, USA. October 31–November 6, 2008. pp. 563-570. ASME. https://doi.org/10.1115/IMECE2008-68616
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