Multi absorber stand alone liquid desiccant air-conditioning systems for higher performance
Achieving comfortable environment with the use of renewable energy or waste heat without creating the hazardous effects over the earth atmosphere are major challenges in the field of air-conditioning. Liquid desiccant technology is a promising option. For the past few decades research is going on wo...
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Veröffentlicht in: | Solar energy 2009-05, Vol.83 (5), p.761-772 |
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creator | Kumar, Ritunesh Dhar, P.L. Jain, Sanjeev Asati, A.K. |
description | Achieving comfortable environment with the use of renewable energy or waste heat without creating the hazardous effects over the earth atmosphere are major challenges in the field of air-conditioning. Liquid desiccant technology is a promising option. For the past few decades research is going on worldwide to commercialize such systems. Hybrid liquid desiccant systems (combination of vapor compression (V-C) and liquid desiccant system) have got more attention probably due to higher COPs and lower regeneration temperature for such systems.
In the present communication the steady-state performance of stand alone liquid desiccant systems has been simulated and analyzed. Falling film designs of absorber and regenerator have been selected for the study due to their lower pressure drops. The simulation of these components has been carried out by solving the basic mass and energy balance equations. These are nonlinear coupled first order differential equations, which have been solved by using fourth order finite difference Runge–Kutta method. The overall system has been simulated using Warner’s technique. Two new stand alone liquid desiccant cycles utilizing the potential of desiccant fully through multiple absorbers have been proposed. The proposed new cycles improve the COP of stand alone systems significantly. A parametric study has also been carried out on these liquid desiccant cycles to identify the key design parameters affecting the performance of the system. |
doi_str_mv | 10.1016/j.solener.2008.11.010 |
format | Article |
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In the present communication the steady-state performance of stand alone liquid desiccant systems has been simulated and analyzed. Falling film designs of absorber and regenerator have been selected for the study due to their lower pressure drops. The simulation of these components has been carried out by solving the basic mass and energy balance equations. These are nonlinear coupled first order differential equations, which have been solved by using fourth order finite difference Runge–Kutta method. The overall system has been simulated using Warner’s technique. Two new stand alone liquid desiccant cycles utilizing the potential of desiccant fully through multiple absorbers have been proposed. The proposed new cycles improve the COP of stand alone systems significantly. A parametric study has also been carried out on these liquid desiccant cycles to identify the key design parameters affecting the performance of the system.</description><identifier>ISSN: 0038-092X</identifier><identifier>EISSN: 1471-1257</identifier><identifier>DOI: 10.1016/j.solener.2008.11.010</identifier><identifier>CODEN: SRENA4</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Absorber ; Air conditioning ; Air conditioning. Ventilation ; Applied sciences ; Cogeneration ; Dehumidifier ; Energy ; Energy. Thermal use of fuels ; Exact sciences and technology ; Heating, air conditioning and ventilation ; Liquid desiccant system ; Parameter optimization ; Regenerative evaporative cooling ; Regenerator ; Sorption ; Studies ; Techniques, equipment. Control. Metering ; Thermal energy</subject><ispartof>Solar energy, 2009-05, Vol.83 (5), p.761-772</ispartof><rights>2008 Elsevier Ltd</rights><rights>2009 INIST-CNRS</rights><rights>Copyright Pergamon Press Inc. May 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c428t-53df769ce9accdbf5f6eddfd4f4333ddde4392e3907ae9e30022417bee1af9e93</citedby><cites>FETCH-LOGICAL-c428t-53df769ce9accdbf5f6eddfd4f4333ddde4392e3907ae9e30022417bee1af9e93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.solener.2008.11.010$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21524566$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Kumar, Ritunesh</creatorcontrib><creatorcontrib>Dhar, P.L.</creatorcontrib><creatorcontrib>Jain, Sanjeev</creatorcontrib><creatorcontrib>Asati, A.K.</creatorcontrib><title>Multi absorber stand alone liquid desiccant air-conditioning systems for higher performance</title><title>Solar energy</title><description>Achieving comfortable environment with the use of renewable energy or waste heat without creating the hazardous effects over the earth atmosphere are major challenges in the field of air-conditioning. Liquid desiccant technology is a promising option. For the past few decades research is going on worldwide to commercialize such systems. Hybrid liquid desiccant systems (combination of vapor compression (V-C) and liquid desiccant system) have got more attention probably due to higher COPs and lower regeneration temperature for such systems.
In the present communication the steady-state performance of stand alone liquid desiccant systems has been simulated and analyzed. Falling film designs of absorber and regenerator have been selected for the study due to their lower pressure drops. The simulation of these components has been carried out by solving the basic mass and energy balance equations. These are nonlinear coupled first order differential equations, which have been solved by using fourth order finite difference Runge–Kutta method. The overall system has been simulated using Warner’s technique. Two new stand alone liquid desiccant cycles utilizing the potential of desiccant fully through multiple absorbers have been proposed. The proposed new cycles improve the COP of stand alone systems significantly. A parametric study has also been carried out on these liquid desiccant cycles to identify the key design parameters affecting the performance of the system.</description><subject>Absorber</subject><subject>Air conditioning</subject><subject>Air conditioning. Ventilation</subject><subject>Applied sciences</subject><subject>Cogeneration</subject><subject>Dehumidifier</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Exact sciences and technology</subject><subject>Heating, air conditioning and ventilation</subject><subject>Liquid desiccant system</subject><subject>Parameter optimization</subject><subject>Regenerative evaporative cooling</subject><subject>Regenerator</subject><subject>Sorption</subject><subject>Studies</subject><subject>Techniques, equipment. Control. 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Ventilation</topic><topic>Applied sciences</topic><topic>Cogeneration</topic><topic>Dehumidifier</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Exact sciences and technology</topic><topic>Heating, air conditioning and ventilation</topic><topic>Liquid desiccant system</topic><topic>Parameter optimization</topic><topic>Regenerative evaporative cooling</topic><topic>Regenerator</topic><topic>Sorption</topic><topic>Studies</topic><topic>Techniques, equipment. Control. Metering</topic><topic>Thermal energy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Ritunesh</creatorcontrib><creatorcontrib>Dhar, P.L.</creatorcontrib><creatorcontrib>Jain, Sanjeev</creatorcontrib><creatorcontrib>Asati, A.K.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Environment Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>Sustainability Science Abstracts</collection><jtitle>Solar energy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Ritunesh</au><au>Dhar, P.L.</au><au>Jain, Sanjeev</au><au>Asati, A.K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multi absorber stand alone liquid desiccant air-conditioning systems for higher performance</atitle><jtitle>Solar energy</jtitle><date>2009-05-01</date><risdate>2009</risdate><volume>83</volume><issue>5</issue><spage>761</spage><epage>772</epage><pages>761-772</pages><issn>0038-092X</issn><eissn>1471-1257</eissn><coden>SRENA4</coden><abstract>Achieving comfortable environment with the use of renewable energy or waste heat without creating the hazardous effects over the earth atmosphere are major challenges in the field of air-conditioning. Liquid desiccant technology is a promising option. For the past few decades research is going on worldwide to commercialize such systems. Hybrid liquid desiccant systems (combination of vapor compression (V-C) and liquid desiccant system) have got more attention probably due to higher COPs and lower regeneration temperature for such systems.
In the present communication the steady-state performance of stand alone liquid desiccant systems has been simulated and analyzed. Falling film designs of absorber and regenerator have been selected for the study due to their lower pressure drops. The simulation of these components has been carried out by solving the basic mass and energy balance equations. These are nonlinear coupled first order differential equations, which have been solved by using fourth order finite difference Runge–Kutta method. The overall system has been simulated using Warner’s technique. Two new stand alone liquid desiccant cycles utilizing the potential of desiccant fully through multiple absorbers have been proposed. The proposed new cycles improve the COP of stand alone systems significantly. A parametric study has also been carried out on these liquid desiccant cycles to identify the key design parameters affecting the performance of the system.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.solener.2008.11.010</doi><tpages>12</tpages></addata></record> |
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source | ScienceDirect Journals (5 years ago - present) |
subjects | Absorber Air conditioning Air conditioning. Ventilation Applied sciences Cogeneration Dehumidifier Energy Energy. Thermal use of fuels Exact sciences and technology Heating, air conditioning and ventilation Liquid desiccant system Parameter optimization Regenerative evaporative cooling Regenerator Sorption Studies Techniques, equipment. Control. Metering Thermal energy |
title | Multi absorber stand alone liquid desiccant air-conditioning systems for higher performance |
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