Journal
APPLIED ENERGY
Volume 88, Issue 12, Pages 4621-4631Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2011.06.007
Keywords
Combined cooling heating and power (CCHP); Electrical demand management (EDM); Thermal demand management (TDM); Primary energy saving; Exergy efficiency; CO2 emission reduction
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Funding
- Fundamental Research Funds for the Central Universities [10MG12]
- Program for Changjiang Scholars and Innovative Research Team in University in China [PCSIRT0720]
- Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, China
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Operation mode of combined cooling heating and power (CCHP) system determines its energetic and environmental performances. This paper analyzes the energy flows of CCHP system and separated production (SP) system. The fuel energy consumptions of CCHP system following electrical demand management (EDM) and thermal demand management (TDM) are deduced respectively. Three indicators: primary energy saving, exergy efficiency and CO2 emission reduction, are employed to evaluate the performances of CCHP system for a commercial building in Beijing, China. The feasibility analysis shows that the performance of CCHP system is strictly dependent upon building energy demands. The selection of CCHP operation modes is systemically based on building loads, CCHP system and local SP system. The calculation results conclude that CCHP system in winter under EDM achieves more benefits than in summer. The sensitivity discussion indicates that the coefficient of performance for cooling and the efficiency of electricity generation are the most sensitive variables to the energetic and environmental performances of CCHP system. (C) 2011 Elsevier Ltd. All rights reserved.
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