Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning

Waste heat from engine can be utilized to drive an adsorption cooling system for air conditioning purposes in the vehicle cabin, which not only improves the fuel economy but also reduces the carbon footprint. It is also important to reduce the size of the adsorption bed to adopt the adsorption techn...

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Main Authors: Ali, Syed Muztuza, Chakraborty, Anutosh
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2016
Subjects:
SCP
COP
Online Access:https://hdl.handle.net/10356/80374
http://hdl.handle.net/10220/40539
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-803742020-03-07T13:19:20Z Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning Ali, Syed Muztuza Chakraborty, Anutosh School of Mechanical and Aerospace Engineering Modelling and simulation Heat recovery SCP Adsorption chiller COP Waste heat from engine can be utilized to drive an adsorption cooling system for air conditioning purposes in the vehicle cabin, which not only improves the fuel economy but also reduces the carbon footprint. It is also important to reduce the size of the adsorption bed to adopt the adsorption technology for air-conditioning applications in passenger cars, buses and trucks or even trains. In this article, we present a two stage indirect exhaust heat recovery system of automotive engine employing an effective lumped parameter model to simulate the dynamic behaviors of an adsorption chiller that ranges from the transient to the cyclic steady states. The thermodynamic framework of adsorption chiller is developed from the rigor of mass and energy balances of each component of the system and experimentally confirmed isotherms and kinetics data of various adsorbent–adsorbate pairs. The performance factors are calculated in terms of COP (Coefficient of Performance) and SCP (Specific Cooling Power) for different operating parameters such as cycle time, exhaust gas temperatures, cooling water temperatures and flow rates. From the simulation results, it is found that the exhaust energy of a six cylinder 3000 cc private car is able to produce nearly 3 kW of cooling power for the car cabin. It is also observed that the driving heat source temperature does not remain constant throughout the cycle time unlike the conventional adsorption chiller, and the hot water temperatures as driving source vary from 65 to 95 °C. CaCl2-in-silica gel–water system is found better in terms of COP and SCP as compared with other adsorbents – water systems. 2016-05-13T05:51:04Z 2019-12-06T13:48:12Z 2016-05-13T05:51:04Z 2019-12-06T13:48:12Z 2015 2015 Journal Article Ali, S. M., & Chakrabory, A. (2015). Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning. Applied Thermal Engineering, 90, 54-63. 1359-4311 https://hdl.handle.net/10356/80374 http://hdl.handle.net/10220/40539 10.1016/j.applthermaleng.2015.06.078 191962 en Applied Thermal Engineering © 2015 Elsevier.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Modelling and simulation
Heat recovery
SCP
Adsorption chiller
COP
spellingShingle Modelling and simulation
Heat recovery
SCP
Adsorption chiller
COP
Ali, Syed Muztuza
Chakraborty, Anutosh
Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
description Waste heat from engine can be utilized to drive an adsorption cooling system for air conditioning purposes in the vehicle cabin, which not only improves the fuel economy but also reduces the carbon footprint. It is also important to reduce the size of the adsorption bed to adopt the adsorption technology for air-conditioning applications in passenger cars, buses and trucks or even trains. In this article, we present a two stage indirect exhaust heat recovery system of automotive engine employing an effective lumped parameter model to simulate the dynamic behaviors of an adsorption chiller that ranges from the transient to the cyclic steady states. The thermodynamic framework of adsorption chiller is developed from the rigor of mass and energy balances of each component of the system and experimentally confirmed isotherms and kinetics data of various adsorbent–adsorbate pairs. The performance factors are calculated in terms of COP (Coefficient of Performance) and SCP (Specific Cooling Power) for different operating parameters such as cycle time, exhaust gas temperatures, cooling water temperatures and flow rates. From the simulation results, it is found that the exhaust energy of a six cylinder 3000 cc private car is able to produce nearly 3 kW of cooling power for the car cabin. It is also observed that the driving heat source temperature does not remain constant throughout the cycle time unlike the conventional adsorption chiller, and the hot water temperatures as driving source vary from 65 to 95 °C. CaCl2-in-silica gel–water system is found better in terms of COP and SCP as compared with other adsorbents – water systems.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Ali, Syed Muztuza
Chakraborty, Anutosh
format Article
author Ali, Syed Muztuza
Chakraborty, Anutosh
author_sort Ali, Syed Muztuza
title Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
title_short Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
title_full Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
title_fullStr Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
title_full_unstemmed Thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
title_sort thermodynamic modelling and performance study of an engine waste heat driven adsorption cooling for automotive air-conditioning
publishDate 2016
url https://hdl.handle.net/10356/80374
http://hdl.handle.net/10220/40539
_version_ 1681048912350150656