Abstract
The combined cooling, heating and power (CCHP) system is a promising energy-efficient technology to realize energy cascade utilization. With the integration of photovoltaic/thermal panels and thermal energy storage, the comprehensive performance of the system can be further improved. However, the performance is also affected by the operation strategy. This paper proposes an effective operation strategy to deal with the energy flow of the system well to achieve a better performance. The mathematical model of a CCHP system hybridized with photovoltaic/thermal panels and thermal energy storage is established in this paper. The optimal size of key components of the CCHP system is determined by the particle swarm optimization (PSO) algorithm. Case studies of four scenarios of a residential zone in Beijing are conducted to verify the effectiveness of the system structure and efficiency of the proposed method. The results show that by adding photovoltaic/thermal (PV/T) panels and thermal energy storage, the economic and energetic benefits can be effectively improved and the proposed operation strategy is effective.
Highlights
Nowadays, growing energy demand is causing a serious crisis of energy and environment issues and the energy shortage gap is increasing rapidly
As part of the energy Internet, a combined cooling, heating and power (CCHP) system has the characteristics of improving global energy efficiency; utilizing renewable energy sources widely; lowering the environmental impact in terms of greenhouse gas emissions; and reducing investments in electric infrastructure [1,2,3]
Combined with some renewable energy technologies like solar energy, wind energy or biomass, many attempts have been made to improve the overall efficiency of the CCHP system integrating various renewable energy technologies, such as solar assisted CCHP system [4], wind power assisted CCHP system [5], bio-mass power assisted CCHP system [6] and ground source heat pump assisted CCHP system [7]
Summary
Nowadays, growing energy demand is causing a serious crisis of energy and environment issues and the energy shortage gap is increasing rapidly. Efficient energy conversion and cascade utilization is a problem we must pay attention to. As part of the energy Internet, a combined cooling, heating and power (CCHP) system has the characteristics of improving global energy efficiency; utilizing renewable energy sources widely; lowering the environmental impact in terms of greenhouse gas emissions; and reducing investments in electric infrastructure [1,2,3]. The abovementioned advantages of the CCHP system have drawn considerable attention from researchers over the last decades. The considerable implementation of renewable energy promotes the development of CCHP systems. Some new emerging technologies, including organic rankine cycle [8], stirling engines [9] and fuel cells [10], promote the development of the CCHP system
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