dc.contributor.authorWang, Lei
dc.contributor.authorCai, Wenjian
dc.contributor.authorZhao, Hongxia
dc.contributor.authorLin, Chen
dc.contributor.authorYan, Jia
dc.identifier.citationWang, L., Cai, W., Zhao, H., Lin, C., & Yan, J. (2016). Experimentation and cycle performance prediction of hybrid A/C system using automobile exhaust waste heat. Applied Thermal Engineering, 94, 314-323.en_US
dc.description.abstractA hybrid air-conditioning (A/C) system is proposed which consists of two cycles: (1) an ejector cycle driven by exhausted waste heat; and (2) a compressor A/C cycle. The system can operate under three modes: compressor, hybrid and ejector. Under the hybrid mode, the ejector driven by waste heat reduces the compression ratio (CR) of the compressor and boosts the compressor discharge pressure to the condenser pressure. The governing equations are derived based on energy and mass balances for each component of the system. The performance of the hybrid A/C system under compressor mode and hybrid mode is first analyzed theoretically at design conditions. Then it was tested experimentally through variations of (1) primary pressure from 11 to 23 bar; (2) evaporation pressure from 2.5 to 4.5 bar; and (3) condensation pressure from 9 to 12.5 bar, respectively. The experimental results show that the hybrid system is feasible, and can significantly enhance the performance of the automobile A/C systems, 35.2% COP improvement at the automobile idle conditions and more than 40% COP improvement when the automobile speeds over 80 km/h conditions. The increase of primary pressure and evaporation pressure has a positive effect on system performance while the increase of condensation pressure has a negative effect. The hybrid A/C system has the potential to be adopted in automobiles for the advantages of low cost, durable operation and better energy efficiencyen_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.format.extent27 p.en_US
dc.relation.ispartofseriesApplied Thermal Engineeringen_US
dc.rights© 2015 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Applied Thermal Engineering, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.applthermaleng.2015.10.051].en_US
dc.subjectAutomobile air-conditioning systemen_US
dc.subjectExhaust waste heaten_US
dc.subjectHybrid systemen_US
dc.subjectCompression ratioen_US
dc.titleExperimentation and cycle performance prediction of hybrid A/C system using automobile exhaust waste heaten_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionAccepted versionen_US

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