Chiller energy savings by waste cold recovery from liquid nitrogen bulk

Chiller energy savings by waste cold recovery from liquid nitrogen bulk

Waste cold energy generated from the liquid nitrogen vaporization is usually abandoned when the gas supply system is pre-designed without cold integration. The purpose of this study is to investigate the potential for energy savings in a chiller system through the integration of waste cold recovery...

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Main Author: Oh, Yin Seng
Format: Thesis
Language:English
Published: 2023
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/101724/1/OhYinSengMSChE2023.pdf.pdf
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spelling my-utm-ep.1017242023-07-09T01:16:49Z Chiller energy savings by waste cold recovery from liquid nitrogen bulk 2023 Oh, Yin Seng TP Chemical technology Waste cold energy generated from the liquid nitrogen vaporization is usually abandoned when the gas supply system is pre-designed without cold integration. The purpose of this study is to investigate the potential for energy savings in a chiller system through the integration of waste cold recovery with thermal energy storage. The waste cold recovery system captures the waste cold generated during the operation of the liquid bulk nitrogen system and transfers it to a thermal energy storage system. This stored energy can then be utilized to supplement the chiller system during the targeted periods of peak demand, reducing its load and increasing its efficiency. The minimum of thermal energy storage capacity is determined by targeting the maximum peak shaving load through Cold Energy Storage Cascade Analysis (CESCA). The study analyses the feasibility of the waste cold recovery method in terms of energy savings, payback period and cost-effectiveness with peak load shaving of air-cooled and water-cooled chiller. Case study of 500 kg/h of liquid nitrogen revealed the significant energy savings at 124 MWh annually and avoided of 83 tCO2/year with minimum thermal energy storage capacity at seven tones of refrigeration. The simple payback period on air-cooled chiller is slightly better than water-cooled chiller which ranged from four to five years. The study concludes that the integration of waste cold recovery with thermal energy storage is a promising solution for liquid bulk nitrogen users looking for energy savings efforts and reduce their carbon footprint. 2023 Thesis http://eprints.utm.my/id/eprint/101724/ http://eprints.utm.my/id/eprint/101724/1/OhYinSengMSChE2023.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:152215 masters Universiti Teknologi Malaysia Faculty of Engineering - School of Chemical & Energy Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Oh, Yin Seng
Chiller energy savings by waste cold recovery from liquid nitrogen bulk
description Waste cold energy generated from the liquid nitrogen vaporization is usually abandoned when the gas supply system is pre-designed without cold integration. The purpose of this study is to investigate the potential for energy savings in a chiller system through the integration of waste cold recovery with thermal energy storage. The waste cold recovery system captures the waste cold generated during the operation of the liquid bulk nitrogen system and transfers it to a thermal energy storage system. This stored energy can then be utilized to supplement the chiller system during the targeted periods of peak demand, reducing its load and increasing its efficiency. The minimum of thermal energy storage capacity is determined by targeting the maximum peak shaving load through Cold Energy Storage Cascade Analysis (CESCA). The study analyses the feasibility of the waste cold recovery method in terms of energy savings, payback period and cost-effectiveness with peak load shaving of air-cooled and water-cooled chiller. Case study of 500 kg/h of liquid nitrogen revealed the significant energy savings at 124 MWh annually and avoided of 83 tCO2/year with minimum thermal energy storage capacity at seven tones of refrigeration. The simple payback period on air-cooled chiller is slightly better than water-cooled chiller which ranged from four to five years. The study concludes that the integration of waste cold recovery with thermal energy storage is a promising solution for liquid bulk nitrogen users looking for energy savings efforts and reduce their carbon footprint.
format Thesis
qualification_level Master's degree
author Oh, Yin Seng
author_facet Oh, Yin Seng
author_sort Oh, Yin Seng
title Chiller energy savings by waste cold recovery from liquid nitrogen bulk
title_short Chiller energy savings by waste cold recovery from liquid nitrogen bulk
title_full Chiller energy savings by waste cold recovery from liquid nitrogen bulk
title_fullStr Chiller energy savings by waste cold recovery from liquid nitrogen bulk
title_full_unstemmed Chiller energy savings by waste cold recovery from liquid nitrogen bulk
title_sort chiller energy savings by waste cold recovery from liquid nitrogen bulk
granting_institution Universiti Teknologi Malaysia
granting_department Faculty of Engineering - School of Chemical & Energy Engineering
publishDate 2023
url http://eprints.utm.my/id/eprint/101724/1/OhYinSengMSChE2023.pdf.pdf
_version_ 1776100756368130048

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