A new utilization approach of the waste heat with mid-low temperature in the combined heating and power system integrating heat pump. (15th December 2015)

• Record Type: Journal Article
• Authors: Kang, Shushuo; Li, Hongqiang; Lei, Jing; Liu, Lifang; Cai, Bo; Zhang, Guoqiang
• Is Part Of: Applied energy. Volume 160(2015:Dec. 15)
• Page Start: 185
• Page End: 193
• Publication Date: 2015-12-15
• Subjects: Waste heat utilization -- System integrating -- Combined heating and power system -- Heat pump -- Ground source heat pump; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2015.09.054
• Languages: English
• ISSNs: 0306-2619

Abstract

Highlights: A new utilization approach of the waste heat with mid-low temperature is presented. A new CHP–GSHP coupling system is proposed to explain the integrating mechanism. The performances of the new CHP–GSHP coupling system are numerically investigated. The superiorities of the proposed system are demonstrated. Abstract: The efficient utilization of the waste heat with mid-low temperature from the combined heating and power (CHP) system is crucial for the improvement of the energy efficiency. In the CHP system, the waste heat with mid-low temperature was directly used to generate domestic hot water or heat by the heat exchanger. Different from common methods, in this paper a new utilization approach of the waste heat with mid-low temperature by integrating the CHP system and the ground source heat pump (GSHP) was proposed, and a new coupling system was designed based on the integrating mechanism. Numerical simulations were implemented to investigate the performances of the proposed coupling system. The influence characteristics of the temperature of the warm water generated by the GSHP on system performances, including the coefficient of performance (COP) of the GSHP, the heat output and the total energy efficiency, were revealed. The results showed that with the same input and heat output, the proposed system can generate more power than the reference system, and the total energy efficiency and the COP of the GSHP were simultaneously improved.