A novel energy efficient compression adsorption hybrid for higher COP

To meet the rising global demand in energy, it is necessary to develop a sustainable cooling system. The hybrid adsorption cooling cycle is an example of the proposed sustainable cooling systems. The hybrid system uses the amalgamation of vapour compression and adsorption, employing silica gel-water...

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Main Author: Kho, Desmond Jun Hong
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2014
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Online Access:http://hdl.handle.net/10356/60288
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-602882019-12-10T11:09:31Z A novel energy efficient compression adsorption hybrid for higher COP Kho, Desmond Jun Hong School of Mechanical and Aerospace Engineering Asst Prof Anutosh Chakraborty DRNTU::Engineering To meet the rising global demand in energy, it is necessary to develop a sustainable cooling system. The hybrid adsorption cooling cycle is an example of the proposed sustainable cooling systems. The hybrid system uses the amalgamation of vapour compression and adsorption, employing silica gel-water as adsorbent-adsorbate pair. Compared to absorption refrigeration, silica gel-water adsorption refrigeration does not experience the problems of corrosion, crystallization and distillation. Due to non-isothermal supercritical heat rejection in the gas cooler, the CO2 based cooling cycle has unsatisfactory cooling capacity and low coefficient of performance. It is feasible to use the waste heat generated from the compressor of a CO2 cycle to drive an adsorption reactor. These combinations not only decrease the heat sink or condenser temperature of CO2 cycle, they also improve the overall COP. Given its effective cold production which relies upon waste heat and solar energy utilization, thermally driven cooling cycle plays a significant role in reducing energy consumption. The cycle simulation was based on the experimentally confirmed adsorption isotherms, kinetics and isosteric heat of adsorption data for silica gel-water. The optimum coefficient of performance (COP) and specific cooling power (SCP) were calculated in terms of cycle time, switching time, mass flow rate of CO2 and cooling water of condenser and temperature of heat source. The temperature profiles of the components were also plotted. Results showed that the combined adsorption cycles were feasible even when the low-temperature heat source was available. With the hybrid adsorption cooling system, the overall COP improved from 2.067 to 2.226. Bachelor of Engineering (Mechanical Engineering) 2014-05-26T06:31:53Z 2014-05-26T06:31:53Z 2014 2014 Final Year Project (FYP) http://hdl.handle.net/10356/60288 en Nanyang Technological University 134 p. application/msword
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Kho, Desmond Jun Hong
A novel energy efficient compression adsorption hybrid for higher COP
description To meet the rising global demand in energy, it is necessary to develop a sustainable cooling system. The hybrid adsorption cooling cycle is an example of the proposed sustainable cooling systems. The hybrid system uses the amalgamation of vapour compression and adsorption, employing silica gel-water as adsorbent-adsorbate pair. Compared to absorption refrigeration, silica gel-water adsorption refrigeration does not experience the problems of corrosion, crystallization and distillation. Due to non-isothermal supercritical heat rejection in the gas cooler, the CO2 based cooling cycle has unsatisfactory cooling capacity and low coefficient of performance. It is feasible to use the waste heat generated from the compressor of a CO2 cycle to drive an adsorption reactor. These combinations not only decrease the heat sink or condenser temperature of CO2 cycle, they also improve the overall COP. Given its effective cold production which relies upon waste heat and solar energy utilization, thermally driven cooling cycle plays a significant role in reducing energy consumption. The cycle simulation was based on the experimentally confirmed adsorption isotherms, kinetics and isosteric heat of adsorption data for silica gel-water. The optimum coefficient of performance (COP) and specific cooling power (SCP) were calculated in terms of cycle time, switching time, mass flow rate of CO2 and cooling water of condenser and temperature of heat source. The temperature profiles of the components were also plotted. Results showed that the combined adsorption cycles were feasible even when the low-temperature heat source was available. With the hybrid adsorption cooling system, the overall COP improved from 2.067 to 2.226.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Kho, Desmond Jun Hong
format Final Year Project
author Kho, Desmond Jun Hong
author_sort Kho, Desmond Jun Hong
title A novel energy efficient compression adsorption hybrid for higher COP
title_short A novel energy efficient compression adsorption hybrid for higher COP
title_full A novel energy efficient compression adsorption hybrid for higher COP
title_fullStr A novel energy efficient compression adsorption hybrid for higher COP
title_full_unstemmed A novel energy efficient compression adsorption hybrid for higher COP
title_sort novel energy efficient compression adsorption hybrid for higher cop
publishDate 2014
url http://hdl.handle.net/10356/60288
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