The experimental investigation on the performance of a low temperature waste heat-driven multi-bed desiccant dehumidifier (MBDD) and minimization of entropy generation

Handle URI:
http://hdl.handle.net/10754/562201
Title:
The experimental investigation on the performance of a low temperature waste heat-driven multi-bed desiccant dehumidifier (MBDD) and minimization of entropy generation
Authors:
Myat, Aung; Thu, Kyaw; Ng, K. C.
Abstract:
We present the experimental investigation on the performance of multi-bed desiccant dehumidification system (MBDD) using a thermodynamic framework with an entropy generation analysis. The cyclic steady state performance of adsorption-desorption processes at the assorted heat source temperatures, and typical ambient humidity conditions was carried out. MBDD unit uses type-RD silica gel pore surface area with of 720 m 2/g. It has a nominal diameter range of 0.4 to 0. 7 mm. The key advantages of MBDD are: (i) it has no moving parts rendering less maintenance, (ii) energy-efficient means of dehumidification by adsorption process with low temperature heat source as compared to the conventional methods, (iii) although it is a pecked bed desiccant, a laminar chamber is employed by arranging the V-shaped configuration of heat exchangers and (iv) it is environmental friendly with the low-carbon footprint. Entropy generation analysis was performed at the assorted heat source temperatures to investigate the performance of MBDD. By conducting the entropy minimization, it is now able to locate the optimal operating conditions of the system while the specific entropy generation is found to be minimal. This analysis shows that the minimization of entropy generation in the dehumidification cycle leads to the maximization of COP in the MBDD and thus, higher delivery of useful effects at the same input resources. © 2011 Elsevier Ltd. All rights reserved.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination & Reuse Research Cntr
Publisher:
Elsevier
Journal:
Applied Thermal Engineering
Issue Date:
Jun-2012
DOI:
10.1016/j.applthermaleng.2012.01.041
Type:
Article
ISSN:
13594311
Sponsors:
The authors would like to express their gratitude to A*STAR (Singapore Grant No. R265-000-287-305) for their generous financial support for this project.
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMyat, Aungen
dc.contributor.authorThu, Kyawen
dc.contributor.authorNg, K. C.en
dc.date.accessioned2015-08-03T09:47:09Zen
dc.date.available2015-08-03T09:47:09Zen
dc.date.issued2012-06en
dc.identifier.issn13594311en
dc.identifier.doi10.1016/j.applthermaleng.2012.01.041en
dc.identifier.urihttp://hdl.handle.net/10754/562201en
dc.description.abstractWe present the experimental investigation on the performance of multi-bed desiccant dehumidification system (MBDD) using a thermodynamic framework with an entropy generation analysis. The cyclic steady state performance of adsorption-desorption processes at the assorted heat source temperatures, and typical ambient humidity conditions was carried out. MBDD unit uses type-RD silica gel pore surface area with of 720 m 2/g. It has a nominal diameter range of 0.4 to 0. 7 mm. The key advantages of MBDD are: (i) it has no moving parts rendering less maintenance, (ii) energy-efficient means of dehumidification by adsorption process with low temperature heat source as compared to the conventional methods, (iii) although it is a pecked bed desiccant, a laminar chamber is employed by arranging the V-shaped configuration of heat exchangers and (iv) it is environmental friendly with the low-carbon footprint. Entropy generation analysis was performed at the assorted heat source temperatures to investigate the performance of MBDD. By conducting the entropy minimization, it is now able to locate the optimal operating conditions of the system while the specific entropy generation is found to be minimal. This analysis shows that the minimization of entropy generation in the dehumidification cycle leads to the maximization of COP in the MBDD and thus, higher delivery of useful effects at the same input resources. © 2011 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThe authors would like to express their gratitude to A*STAR (Singapore Grant No. R265-000-287-305) for their generous financial support for this project.en
dc.publisherElsevieren
dc.subjectDesiccant dehumidifieren
dc.subjectEntropy generation minimizationen
dc.subjectSilica gelen
dc.subjectWaste heat recoveryen
dc.titleThe experimental investigation on the performance of a low temperature waste heat-driven multi-bed desiccant dehumidifier (MBDD) and minimization of entropy generationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalApplied Thermal Engineeringen
dc.contributor.institutionMechanical Engineering Department, National University of Singapore, 9 Engineering Drive 1, Kent Ridge Crescent, 117576 Singapore, Singaporeen
kaust.authorThu, Kyawen
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