Performance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalination

Handle URI:
http://hdl.handle.net/10754/621801
Title:
Performance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalination
Authors:
Thu, Kyaw; Saha, Bidyut Baran; Chua, Kian Jon; Ng, Kim Choon ( 0000-0003-3930-4127 )
Abstract:
Environment-friendly adsorption (AD) cycles have gained much attention in cooling industry and its applicability has been extended to desalination recently. AD cycles are operational by low-temperature heat sources such as exhaust gas from processes or renewable energy with temperatures ranging from 55 °C to 85 °C. The cycle is capable of producing two useful effects, namely cooling power and high-grade potable water, simultaneously. This article discusses a low temperature, waste heat-powered adsorption (AD) cycle that produces cooling power at two temperature-levels for both dehumidification and sensible cooling while providing high-grade potable water. The cycle exploits faster kinetics for desorption process with one adsorber bed under regeneration mode while full utilization of the uptake capacity by adsorbent material is achieved employing two-stage adsorption via low-pressure and high-pressure evaporators. Type A++ silica gel with surface area of 863.6 m2/g and pore volume of 0.446 cm3/g is employed as adsorbent material. A comprehensive numerical model for such AD cycle is developed and the performance results are presented using assorted hot water and cooling water inlet temperatures for various cycle time arrangements. The cycle is analyzed in terms of key performance indicators i.e.; the specific cooling power (SCP), the coefficient of performance (COP) for both evaporators and the overall system, the specific daily water production (SDWP) and the performance ratio (PR). Further insights into the cycle performance are scrutinized using a Dühring diagram to depict the thermodynamic states of the processes as well as the vapor uptake behavior of adsorbent. In the proposed cycle, the adsorbent materials undergo near saturation conditions due to the pressurization effect from the high pressure evaporator while faster kinetics for desorption process is exploited, subsequently providing higher system COP, notably up to 0.82 at longer cycle time while the COPs for low-pressure and high-pressure evaporators are recorded to be 0.33 and 0.51, respectively. © 2016 Elsevier Ltd.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Thu K, Saha BB, Chua KJ, Ng KC (2016) Performance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalination. International Journal of Heat and Mass Transfer 101: 1111–1122. Available: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.05.127.
Publisher:
Elsevier BV
Journal:
International Journal of Heat and Mass Transfer
Issue Date:
13-Jun-2016
DOI:
10.1016/j.ijheatmasstransfer.2016.05.127
Type:
Article
ISSN:
0017-9310
Sponsors:
National Research Foundation Singapore[R-265-000-466-281]
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorThu, Kyawen
dc.contributor.authorSaha, Bidyut Baranen
dc.contributor.authorChua, Kian Jonen
dc.contributor.authorNg, Kim Choonen
dc.date.accessioned2016-11-03T13:25:16Z-
dc.date.available2016-11-03T13:25:16Z-
dc.date.issued2016-06-13en
dc.identifier.citationThu K, Saha BB, Chua KJ, Ng KC (2016) Performance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalination. International Journal of Heat and Mass Transfer 101: 1111–1122. Available: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.05.127.en
dc.identifier.issn0017-9310en
dc.identifier.doi10.1016/j.ijheatmasstransfer.2016.05.127en
dc.identifier.urihttp://hdl.handle.net/10754/621801-
dc.description.abstractEnvironment-friendly adsorption (AD) cycles have gained much attention in cooling industry and its applicability has been extended to desalination recently. AD cycles are operational by low-temperature heat sources such as exhaust gas from processes or renewable energy with temperatures ranging from 55 °C to 85 °C. The cycle is capable of producing two useful effects, namely cooling power and high-grade potable water, simultaneously. This article discusses a low temperature, waste heat-powered adsorption (AD) cycle that produces cooling power at two temperature-levels for both dehumidification and sensible cooling while providing high-grade potable water. The cycle exploits faster kinetics for desorption process with one adsorber bed under regeneration mode while full utilization of the uptake capacity by adsorbent material is achieved employing two-stage adsorption via low-pressure and high-pressure evaporators. Type A++ silica gel with surface area of 863.6 m2/g and pore volume of 0.446 cm3/g is employed as adsorbent material. A comprehensive numerical model for such AD cycle is developed and the performance results are presented using assorted hot water and cooling water inlet temperatures for various cycle time arrangements. The cycle is analyzed in terms of key performance indicators i.e.; the specific cooling power (SCP), the coefficient of performance (COP) for both evaporators and the overall system, the specific daily water production (SDWP) and the performance ratio (PR). Further insights into the cycle performance are scrutinized using a Dühring diagram to depict the thermodynamic states of the processes as well as the vapor uptake behavior of adsorbent. In the proposed cycle, the adsorbent materials undergo near saturation conditions due to the pressurization effect from the high pressure evaporator while faster kinetics for desorption process is exploited, subsequently providing higher system COP, notably up to 0.82 at longer cycle time while the COPs for low-pressure and high-pressure evaporators are recorded to be 0.33 and 0.51, respectively. © 2016 Elsevier Ltd.en
dc.description.sponsorshipNational Research Foundation Singapore[R-265-000-466-281]en
dc.publisherElsevier BVen
dc.subjectAdsorptionen
dc.titlePerformance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalinationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalInternational Journal of Heat and Mass Transferen
dc.contributor.institutionKyushu University Program of Leading Graduate School, Green Asia Education Center, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Fukuoka, Kasuga-shi, Japanen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, Singaporeen
dc.contributor.institutionInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Fukuoka, Nishi-ku, Japanen
dc.contributor.institutionMechanical Engineering Department, Kyushu University, 744 Motooka, Fukuoka, Nishi-ku, Japanen
kaust.authorNg, Kim Choonen
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