A Combined Cooling, Heating and Power System Based on Solar-Assisted Gas-Steam Combined Cycle

doi:10.16513/j.2096-2185.DE.191103

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Distributed Energy ›› 2019, Vol. 4 ›› Issue (6) : 29-34. DOI: 10.16513/j.2096-2185.DE.191103

Basic Research

A Combined Cooling, Heating and Power System Based on Solar-Assisted Gas-Steam Combined Cycle

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Abstract

In order to solve the problems of high cost and low energy utilization rate of solar thermal power generation, a combined cooling, heating and power (CCHP) system based on solar-assisted gas-steam combined cycle is proposed. To improve the flexibility of thermoelectric regulation of the system, the exhaust heat from gas turbine is divided into two parts for cascade energy utilization. One part of the exhaust gas is sent to the gas-steam combined cycle for generating electricity, and another part is used to drive the dual-effect lithium bromide absorption heat pump to produce chilled water for air conditioning system. The thermodynamic models of system components were constructed in EBSILON software. The thermodynamic performances of the system at the design work conditions were simulated and the off-design performances were discussed in the variable solar irradiation intensity and ratio of exhaust gas to combined cycle and absorption heat pump. The results shows that the primary energy utilization efficiency, exergy efficiency and net solar power generation rate of the system are 69.7%, 42.9% and 25.0%, respectively.

Key words

solar energy / gas turbine / combined cooling, heating and power / thermodynamic analysis

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A Combined Cooling, Heating and Power System Based on Solar-Assisted Gas-Steam Combined Cycle[J]. Distributed Energy Resources. 2019, 4(6): 29-34 https://doi.org/10.16513/j.2096-2185.DE.191103

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