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Chillers energy consumption, energy savings and emission analysis in an institutional buildings

Chillers consume more than 40% of the total energy used in the commercial and industrial buildings for space conditioning. In this paper, energy consumption by chillers and chilled water pumps, condenser pumps and fan motors has been estimated using data collected by a walkthrough energy audit for t...

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Main Authors: Saidur, R., Hasanuzzaman, M., Mahlia, T.M.I., Rahim, N.A., Mohammed, H.A.
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Published: 2017
Online Access:http://dspace.uniten.edu.my/jspui/handle/123456789/6215
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spelling my.uniten.dspace-62152017-12-08T09:12:10Z Chillers energy consumption, energy savings and emission analysis in an institutional buildings Saidur, R. Hasanuzzaman, M. Mahlia, T.M.I. Rahim, N.A. Mohammed, H.A. Chillers consume more than 40% of the total energy used in the commercial and industrial buildings for space conditioning. In this paper, energy consumption by chillers and chilled water pumps, condenser pumps and fan motors has been estimated using data collected by a walkthrough energy audit for the 16 faculties of the University of Malaya. It has been estimated that chillers and motors and pumps used in chillers consume 10,737 MWh (i.e. 51% of total energy consumption) of electric energy for different percentage of loadings. As chillers are major energy users, variable speed drives are applied in chillers to reduce their energy consumption. It has been estimated that about 8368 MWh annual energy can be saved by using efficient chillers at different loadings. It has also been found that about 23,532 MWh annual energy can be saved for chilled water supply pumps, condenser pumps and cooling tower fan motors by matching required speeds using variable speed drives for 60% of speed reduction. About 1,274,692 kg of CO2 emission could be avoided for using energy efficient chillers at 50% load. It has been also found that about 2,426,769 kg CO2 emission can be reduced by using variable speed drives for 60% speed reductions. Payback periods found to be only few months for using variable speed drives in chilled water pumps, condensers and fan motors. © 2011 Elsevier Ltd. 2017-12-08T09:12:10Z 2017-12-08T09:12:10Z 2011 http://dspace.uniten.edu.my/jspui/handle/123456789/6215
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Chillers consume more than 40% of the total energy used in the commercial and industrial buildings for space conditioning. In this paper, energy consumption by chillers and chilled water pumps, condenser pumps and fan motors has been estimated using data collected by a walkthrough energy audit for the 16 faculties of the University of Malaya. It has been estimated that chillers and motors and pumps used in chillers consume 10,737 MWh (i.e. 51% of total energy consumption) of electric energy for different percentage of loadings. As chillers are major energy users, variable speed drives are applied in chillers to reduce their energy consumption. It has been estimated that about 8368 MWh annual energy can be saved by using efficient chillers at different loadings. It has also been found that about 23,532 MWh annual energy can be saved for chilled water supply pumps, condenser pumps and cooling tower fan motors by matching required speeds using variable speed drives for 60% of speed reduction. About 1,274,692 kg of CO2 emission could be avoided for using energy efficient chillers at 50% load. It has been also found that about 2,426,769 kg CO2 emission can be reduced by using variable speed drives for 60% speed reductions. Payback periods found to be only few months for using variable speed drives in chilled water pumps, condensers and fan motors. © 2011 Elsevier Ltd.
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author Saidur, R.
Hasanuzzaman, M.
Mahlia, T.M.I.
Rahim, N.A.
Mohammed, H.A.
spellingShingle Saidur, R.
Hasanuzzaman, M.
Mahlia, T.M.I.
Rahim, N.A.
Mohammed, H.A.
Chillers energy consumption, energy savings and emission analysis in an institutional buildings
author_facet Saidur, R.
Hasanuzzaman, M.
Mahlia, T.M.I.
Rahim, N.A.
Mohammed, H.A.
author_sort Saidur, R.
title Chillers energy consumption, energy savings and emission analysis in an institutional buildings
title_short Chillers energy consumption, energy savings and emission analysis in an institutional buildings
title_full Chillers energy consumption, energy savings and emission analysis in an institutional buildings
title_fullStr Chillers energy consumption, energy savings and emission analysis in an institutional buildings
title_full_unstemmed Chillers energy consumption, energy savings and emission analysis in an institutional buildings
title_sort chillers energy consumption, energy savings and emission analysis in an institutional buildings
publishDate 2017
url http://dspace.uniten.edu.my/jspui/handle/123456789/6215
_version_ 1644493875380748288
score 13.222552

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