CO2-assisted compression-adsorption hybrid for cooling and desalination

This paper presents a novel compression-adsorption hybrid that symbiotically combines adsorption and CO2 compression cooling devices. The seemingly low efficiency of each cycle individually is overcome by an amalgamation with the other. Hence, both heat and water vapour refrigerant mass are recovere...

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Main Authors: Ali, Syed Muztuza, Chakraborty, Anutosh, Leong, Kai Choong
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/86290
http://hdl.handle.net/10220/43996
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-862902023-03-04T17:11:59Z CO2-assisted compression-adsorption hybrid for cooling and desalination Ali, Syed Muztuza Chakraborty, Anutosh Leong, Kai Choong School of Mechanical and Aerospace Engineering Adsorption CO2 cycle This paper presents a novel compression-adsorption hybrid that symbiotically combines adsorption and CO2 compression cooling devices. The seemingly low efficiency of each cycle individually is overcome by an amalgamation with the other. Hence, both heat and water vapour refrigerant mass are recovered for continuous cooling and desalination. Two different configurations are presented. The first configuration deals with a two-stage heat recovery system. At the first stage, heat is recovered from the compressed carbon dioxide to drive the adsorption device. The second stage heat recovery system internally exchanges heat between the low pressure and high pressure refrigerants of the CO2 cycle. The second configuration is proposed with an additional third-stage heat recovery from the gas cooler to the high pressure evaporator of the adsorption cycle. The water vapour mass is recovered from bed-to-bed adsorption at relatively higher pressure. A detailed thermodynamic framework is presented to simulate the performances in terms of COP (coefficient of performance), SCP (specific cooling power), SDWP (specific daily water production), PR (performance ratio) and OCR (overall conversion ratio). It is found that the overall COP is improved by more than 60% as compared to the conventional CO2 cycle, and in addition, the system generates 12.7 m3 of desalinated water per tonne of silica gel per day as extra benefits. Furthermore, both the heat and mass recoveries improve the overall conversion ratio, which is almost double as compared to the conventional CO2 cycle. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2017-11-06T04:50:52Z 2019-12-06T16:19:43Z 2017-11-06T04:50:52Z 2019-12-06T16:19:43Z 2017 Journal Article Ali, S. M., Chakraborty, A., & Leong, K. C. (2017). CO2-assisted compression-adsorption hybrid for cooling and desalination. Energy Conversion and Management, 143, 538-552. 0196-8904 https://hdl.handle.net/10356/86290 http://hdl.handle.net/10220/43996 10.1016/j.enconman.2017.04.009 en Energy Conversion and Management © 2017 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Energy Conversion and Management, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.enconman.2017.04.009]. 59 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Adsorption
CO2 cycle
spellingShingle Adsorption
CO2 cycle
Ali, Syed Muztuza
Chakraborty, Anutosh
Leong, Kai Choong
CO2-assisted compression-adsorption hybrid for cooling and desalination
description This paper presents a novel compression-adsorption hybrid that symbiotically combines adsorption and CO2 compression cooling devices. The seemingly low efficiency of each cycle individually is overcome by an amalgamation with the other. Hence, both heat and water vapour refrigerant mass are recovered for continuous cooling and desalination. Two different configurations are presented. The first configuration deals with a two-stage heat recovery system. At the first stage, heat is recovered from the compressed carbon dioxide to drive the adsorption device. The second stage heat recovery system internally exchanges heat between the low pressure and high pressure refrigerants of the CO2 cycle. The second configuration is proposed with an additional third-stage heat recovery from the gas cooler to the high pressure evaporator of the adsorption cycle. The water vapour mass is recovered from bed-to-bed adsorption at relatively higher pressure. A detailed thermodynamic framework is presented to simulate the performances in terms of COP (coefficient of performance), SCP (specific cooling power), SDWP (specific daily water production), PR (performance ratio) and OCR (overall conversion ratio). It is found that the overall COP is improved by more than 60% as compared to the conventional CO2 cycle, and in addition, the system generates 12.7 m3 of desalinated water per tonne of silica gel per day as extra benefits. Furthermore, both the heat and mass recoveries improve the overall conversion ratio, which is almost double as compared to the conventional CO2 cycle.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Ali, Syed Muztuza
Chakraborty, Anutosh
Leong, Kai Choong
format Article
author Ali, Syed Muztuza
Chakraborty, Anutosh
Leong, Kai Choong
author_sort Ali, Syed Muztuza
title CO2-assisted compression-adsorption hybrid for cooling and desalination
title_short CO2-assisted compression-adsorption hybrid for cooling and desalination
title_full CO2-assisted compression-adsorption hybrid for cooling and desalination
title_fullStr CO2-assisted compression-adsorption hybrid for cooling and desalination
title_full_unstemmed CO2-assisted compression-adsorption hybrid for cooling and desalination
title_sort co2-assisted compression-adsorption hybrid for cooling and desalination
publishDate 2017
url https://hdl.handle.net/10356/86290
http://hdl.handle.net/10220/43996
_version_ 1759854324341538816