Performance comparison of combined cooling heating and power system in different operation modes

• Published in: Applied energy Vol. 88; no. 12; pp. 4621 - 4631
• Main Authors: Wang, Jiang-Jiang, Jing, You-Yin, Zhang, Chun-Fa, Zhai, Zhiqiang (John)
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2011; Elsevier
• Subjects: Applied sciences; carbon dioxide; CO 2 emission reduction; Combined cooling heating and power (CCHP); cooling; Electrical demand management (EDM); electricity; Energy; energy conservation; Exact sciences and technology; exergy; Exergy efficiency; fuels; greenhouse gas emissions; heat; primary energy; Primary energy saving; summer; Thermal demand management (TDM); winter; China, People's Rep., Beijing; Primary energy saving; CO 2 emission reduction; Exergy efficiency; Thermal demand management (TDM); Combined cooling heating and power (CCHP); Electrical demand management (EDM); emission reduction; CO
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2011.06.007

► The performances of CCHP system in different operation modes are compared. ► The CCHP system following electrical load and thermal loads are analyzed. ► The instantaneous performances of CCHP system with loads are obtained. ► The sensitivity of CCHP system to the technical parameters are analyzed. 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 CO 2 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.