Experimental Investigation of a Mechanical Vapour Compression Chiller at Elevated Chilled Water Temperatures

Handle URI:
http://hdl.handle.net/10754/623678
Title:
Experimental Investigation of a Mechanical Vapour Compression Chiller at Elevated Chilled Water Temperatures
Authors:
Thu, Kyaw; Saththasivam, Jayaprakash; Saha, Bidyut Baran; Chua, Kian Jon; Srinivasa Murthy, S.; Ng, Kim Choon ( 0000-0003-3930-4127 )
Abstract:
The performance of a Mechanical Vapour Compression (MVC) chiller is experimentally investigated under operating conditions suitable for sensible cooling. With the emergence of the energy efficient dehumidification systems, it is possible to decouple the latent load from the MVC chillers which can be operated at higher chilled water temperature for handling sensible cooling load. In this article, the performance of the chiller is evaluated at the elevated chilled water outlet temperatures (7 – 17° C) at various coolant temperatures (28 – 32° C) and flow rates (ΔT = 4 and 5° C) for both full- and part-load conditions. Keeping the performance at the AHRI standard as the baseline condition, the efficacy of the chiller in terms of compression ratio, cooling capacity and COP at aforementioned conditions is quantified experimentally. It is observed that for each one-degree Celsius increase in the chilled water temperature, the COP of the chiller improves by about 3.5% whilst the cooling capacity improvement is about 4%. For operation at 17° C chilled water outlet temperature, the improvements in COP and cooling capacity are between 37 – 40% and 40 – 45%, respectively, compared to the performance at the AHRI standards. The performance of the MVC chiller at the abovementioned operation conditions is mapped on the chiller performance characteristic chart.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Thu K, Saththasivam J, Saha BB, Chua KJ, Srinivasa Murthy S, et al. (2017) Experimental Investigation of a Mechanical Vapour Compression Chiller at Elevated Chilled Water Temperatures. Applied Thermal Engineering. Available: http://dx.doi.org/10.1016/j.applthermaleng.2017.05.091.
Publisher:
Elsevier BV
Journal:
Applied Thermal Engineering
Issue Date:
18-May-2017
DOI:
10.1016/j.applthermaleng.2017.05.091
Type:
Article
ISSN:
1359-4311
Sponsors:
The authors gratefully acknowledge the Kyushu University Program for Leading Graduate School, Green Asia Education Center and the National Research Foundation (NRF), Singapore, under the research grant (R-265-000-466-281) for their financial support to conduct this study.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S1359431117321531
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorThu, Kyawen
dc.contributor.authorSaththasivam, Jayaprakashen
dc.contributor.authorSaha, Bidyut Baranen
dc.contributor.authorChua, Kian Jonen
dc.contributor.authorSrinivasa Murthy, S.en
dc.contributor.authorNg, Kim Choonen
dc.date.accessioned2017-05-22T06:58:03Z-
dc.date.available2017-05-22T06:58:03Z-
dc.date.issued2017-05-18en
dc.identifier.citationThu K, Saththasivam J, Saha BB, Chua KJ, Srinivasa Murthy S, et al. (2017) Experimental Investigation of a Mechanical Vapour Compression Chiller at Elevated Chilled Water Temperatures. Applied Thermal Engineering. Available: http://dx.doi.org/10.1016/j.applthermaleng.2017.05.091.en
dc.identifier.issn1359-4311en
dc.identifier.doi10.1016/j.applthermaleng.2017.05.091en
dc.identifier.urihttp://hdl.handle.net/10754/623678-
dc.description.abstractThe performance of a Mechanical Vapour Compression (MVC) chiller is experimentally investigated under operating conditions suitable for sensible cooling. With the emergence of the energy efficient dehumidification systems, it is possible to decouple the latent load from the MVC chillers which can be operated at higher chilled water temperature for handling sensible cooling load. In this article, the performance of the chiller is evaluated at the elevated chilled water outlet temperatures (7 – 17° C) at various coolant temperatures (28 – 32° C) and flow rates (ΔT = 4 and 5° C) for both full- and part-load conditions. Keeping the performance at the AHRI standard as the baseline condition, the efficacy of the chiller in terms of compression ratio, cooling capacity and COP at aforementioned conditions is quantified experimentally. It is observed that for each one-degree Celsius increase in the chilled water temperature, the COP of the chiller improves by about 3.5% whilst the cooling capacity improvement is about 4%. For operation at 17° C chilled water outlet temperature, the improvements in COP and cooling capacity are between 37 – 40% and 40 – 45%, respectively, compared to the performance at the AHRI standards. The performance of the MVC chiller at the abovementioned operation conditions is mapped on the chiller performance characteristic chart.en
dc.description.sponsorshipThe authors gratefully acknowledge the Kyushu University Program for Leading Graduate School, Green Asia Education Center and the National Research Foundation (NRF), Singapore, under the research grant (R-265-000-466-281) for their financial support to conduct this study.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1359431117321531en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Applied Thermal Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Thermal Engineering, [, , (2017-05-18)] DOI: 10.1016/j.applthermaleng.2017.05.091 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectmechanical vapour compression chilleren
dc.subjectrefrigerant R134aen
dc.subjectelevated chilled water temperatureen
dc.subjectcoefficient of performanceen
dc.titleExperimental Investigation of a Mechanical Vapour Compression Chiller at Elevated Chilled Water Temperaturesen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalApplied Thermal Engineeringen
dc.eprint.versionPost-printen
dc.contributor.institutionKyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japanen
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporeen
dc.contributor.institutionQatar Environment and Energy Research Institute (QEERI), Qatar Foundation, 5825 Doha, Qataren
dc.contributor.institutionInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japanen
dc.contributor.institutionMechanical Engineering Department, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japanen
dc.contributor.institutionInterdisciplinary Center for Energy Research, Indian Institute of Science, Bangalore 560 012, Indiaen
kaust.authorNg, Kim Choonen
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