Performance Analysis of Combined Cooling, Heating and Power System Integrated with Energy Storage Battery at Comprehensive Conditions

doi:10.11930/j.issn.1004-9649.202301046

Abstract

Abstract:

The combined cooling, heating, and power system (CCHP) boasts efficient energy use and flexible operation. The CCHP integrated system for energy storage battery was designed, with the refined mathematical models of the key components established, and the influence of the compressor and turbine efficiency and ambient temperature on CCHP performance studied. The thermodynamic performance of the CCHP at comprehensive conditions and the charging-discharging characteristics of the battery energy storage system were investigated according to the typical modes of chilling and heating. The results show that the ambient temperature has a significant influence on the performance of CCHP. The maximum heat supply decreases with the decrease in the ambient temperature, and the maximum chilling supply decreases with the increase in the ambient temperature. The cooling load and electric load fluctuate greatly throughout the day in the chilling mode, with the average value for cooling load and electric load representing only about 39.9% of the rated load, and an average energy utilization coefficient of 0.712. In the heating mode, there is insignificant fluctuation of power generation efficiency, heating coefficient and energy utilization coefficient on the typical day, which are all higher than the corresponding indexes in the chilling mode.

Key words: gas turbine, combined cooling, heating and power system, performance, comprehensive conditions, energy storage battery

Fuguo ZHANG, Zepeng LI, Peng WU, Xue WANG, Xiaoen LI. Performance Analysis of Combined Cooling, Heating and Power System Integrated with Energy Storage Battery at Comprehensive Conditions[J]. Electric Power, 2024, 57(2): 161-170.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202301046

https://www.electricpower.com.cn/EN/Y2024/V57/I2/161

Figures/Tables 9

References 22

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数据分类	循环净功率/MW	简单循环发电效率/ %	热耗率/ (kJ·(kW·h)^–1)	燃料量/ (kg·s^–1)	燃料低位发热量/ (MJ·m^–3)	压气机进口空气量/ ( kg·s^–1)	压气机排气温度/℃	压气机压比	燃气初温/℃	燃气透平等熵效率	燃气轮机排气流量/ (kg·s^–1)	燃气轮机排气温度/℃
厂家提供数据	1.210	24.33	14795.0	0.1087	35	6.43	—	6.70	904.00	—	6.539	505.00
建模结果	1.215	24.43	14736.0	0.1085	35	6.44	271.0	6.72	912.30	0.85	6.546	508.30
相对误差/%	0.410	0.41	–0.4	–0.1800	0	0.16	—	0.30	0.92	—	0.110	0.65

数据分类	循环净功率/MW	简单循环发电效率/ %	热耗率/ (kJ·(kW·h)^–1)	燃料量/ (kg·s^–1)	燃料低位发热量/ (MJ·m^–3)	压气机进口空气量/ ( kg·s^–1)	压气机排气温度/℃	压气机压比	燃气初温/℃	燃气透平等熵效率	燃气轮机排气流量/ (kg·s^–1)	燃气轮机排气温度/℃
厂家提供数据	1.210	24.33	14795.0	0.1087	35	6.43	—	6.70	904.00	—	6.539	505.00
建模结果	1.215	24.43	14736.0	0.1085	35	6.44	271.0	6.72	912.30	0.85	6.546	508.30
相对误差/%	0.410	0.41	–0.4	–0.1800	0	0.16	—	0.30	0.92	—	0.110	0.65

项目	制冷工况	供热工况
环境温度/℃	30	5
压气机进口空气量/( kg·s^–1)	5.944	6.628
压气机出口压力/MPa	0.629	0.702
燃料量/( kg·s^–1)	0.0615	0.0727
燃气轮机排气流量/( kg·s^–1)	6.006	6.700
燃气轮机排气温度/ ℃	541.3	514.8
回热器出口烟气温度/ ℃	316.8	287.5
循环净功率/kW	975	1325.9
简单循环发电效率/%	34.61	39.80
蒸发器负荷/kW	965.4	732.1
冷凝器负荷/kW	1033.6	801.9
吸收器负荷/kW	1171.0	976.0
发生器负荷/kW	1239.1	1045.7
制冷/供热系数	0.779	1.700
能源利用系数	0.689	0.932

项目	制冷工况	供热工况
环境温度/℃	30	5
压气机进口空气量/( kg·s^–1)	5.944	6.628
压气机出口压力/MPa	0.629	0.702
燃料量/( kg·s^–1)	0.0615	0.0727
燃气轮机排气流量/( kg·s^–1)	6.006	6.700
燃气轮机排气温度/ ℃	541.3	514.8
回热器出口烟气温度/ ℃	316.8	287.5
循环净功率/kW	975	1325.9
简单循环发电效率/%	34.61	39.80
蒸发器负荷/kW	965.4	732.1
冷凝器负荷/kW	1033.6	801.9
吸收器负荷/kW	1171.0	976.0
发生器负荷/kW	1239.1	1045.7
制冷/供热系数	0.779	1.700
能源利用系数	0.689	0.932

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