Electric-heat coupling characteristics of a cogeneration system and the operating mode of fixing electricity with heat are the main reasons for wind abandonment during the heating season in the Three North area.To imp...Electric-heat coupling characteristics of a cogeneration system and the operating mode of fixing electricity with heat are the main reasons for wind abandonment during the heating season in the Three North area.To improve the wind-power absorption capacity and operating economy of the system,the structure of the system is improved by adding a heat storage device and an electric boiler.First,aiming at the minimum operating cost of the system,the optimal scheduling model of the cogeneration system,including a heat storage device and electric boiler,is constructed.Second,according to the characteristics of the problem,a cultural gene algorithm program is compiled to simulate the calculation example.Finally,through the system improvement,the comparison between the conditions before and after and the simulation solutions of similar algorithms prove the effectiveness of the proposed scheme.The simulation results show that adding the heat storage device and electric boiler to the scheduling optimization process not only improves the wind power consumption capacity of the cogeneration system but also reduces the operating cost of the system by significantly reducing the coal consumption of the unit and improving the economy of the system operation.The cultural gene algorithm framework has both the global evolution process of the population and the local search for the characteristics of the problem,which has a better optimization effect on the solution.展开更多
This paper researches the performance of a novel supercritical carbon dioxide(S-CO_2) Brayton cycle and organic Rankine cycle(ORC) combined system with a theoretical solar radiation diurnal distribution. The new syste...This paper researches the performance of a novel supercritical carbon dioxide(S-CO_2) Brayton cycle and organic Rankine cycle(ORC) combined system with a theoretical solar radiation diurnal distribution. The new system supplies all solar energy to a S-CO_2 Brayton cycle heater, where heat releasing from the S-CO_2 cooler is stored in the thermal storage system which is supplied to the ORC. Therefore, solar energy is kept at a high temperature, while at the same time the thermal storage system temperature is low. This paper builds a simple solar radiation diurnal distribution model. The maximum continuous working time, mass of thermal storage material, and parameter variations of the two cycles are simulated with the solar radiation diurnal distribution model. 10 organic fluids and 5 representative thermal storage materials are compared in this paper, with the mass and volume of these materials being shown. The longer the continuous working time is, the lower the system thermal efficiency is. The maximum continuous working time can reach 19.1 hours if the system provides a constant power output. At the same time, the system efficiency can be kept above 38% for most fluids.展开更多
燃气冷热电联供系统(Combined,Cooling,Heating and Power,CCHP)设备容量及运行策略的整体优化对冷热电联供系统的高效经济运行至关重要。为提高冷热电联供系统的综合性能,提出了一种计及风光储与热泵的冷热电联供系统,采用考虑不同权...燃气冷热电联供系统(Combined,Cooling,Heating and Power,CCHP)设备容量及运行策略的整体优化对冷热电联供系统的高效经济运行至关重要。为提高冷热电联供系统的综合性能,提出了一种计及风光储与热泵的冷热电联供系统,采用考虑不同权重因子的综合评价指标,利用建筑模拟分析软件DeST建立山东某区域建筑的建筑模型,得到冷热电风光负荷数据,以综合性能指标为优化目标,采用混合整数线性规划(Mixed Integer Linear Programming,MILP)算法对系统进行优化配置,并与无风光的冷热电联供系统及分供系统进行比较,研究结果表明,本系统综合指标优化结果比分供系统提高47.8%,比常规CCHP系统综合性能提高19.5%。展开更多
基金supported by the National Natural Science Foundation of China(61773269)China Scholarship for Overseas Studying(CSC No.202008210181),Department of Education of Liaoning Province of China(LJKZ1110)+1 种基金the Natural Science Foundation of Liaoning Province of China(2019-KF-03-08)the Program for Shenyang High Level Innovative Talents(RC190042).
文摘Electric-heat coupling characteristics of a cogeneration system and the operating mode of fixing electricity with heat are the main reasons for wind abandonment during the heating season in the Three North area.To improve the wind-power absorption capacity and operating economy of the system,the structure of the system is improved by adding a heat storage device and an electric boiler.First,aiming at the minimum operating cost of the system,the optimal scheduling model of the cogeneration system,including a heat storage device and electric boiler,is constructed.Second,according to the characteristics of the problem,a cultural gene algorithm program is compiled to simulate the calculation example.Finally,through the system improvement,the comparison between the conditions before and after and the simulation solutions of similar algorithms prove the effectiveness of the proposed scheme.The simulation results show that adding the heat storage device and electric boiler to the scheduling optimization process not only improves the wind power consumption capacity of the cogeneration system but also reduces the operating cost of the system by significantly reducing the coal consumption of the unit and improving the economy of the system operation.The cultural gene algorithm framework has both the global evolution process of the population and the local search for the characteristics of the problem,which has a better optimization effect on the solution.
基金financial support provided by the National Natural Science Foundation of China (Grant No. 51706181, 51806172)the Postdoctoral Science Foundation of China (Grant No. 2017M613294XB)+1 种基金Key Programs of China Huaneng Group (Grant No. HNKJ15-H07)Young Talent Programs of Shaanxi Province of China(Grant No. ZD-18-SST04)
文摘This paper researches the performance of a novel supercritical carbon dioxide(S-CO_2) Brayton cycle and organic Rankine cycle(ORC) combined system with a theoretical solar radiation diurnal distribution. The new system supplies all solar energy to a S-CO_2 Brayton cycle heater, where heat releasing from the S-CO_2 cooler is stored in the thermal storage system which is supplied to the ORC. Therefore, solar energy is kept at a high temperature, while at the same time the thermal storage system temperature is low. This paper builds a simple solar radiation diurnal distribution model. The maximum continuous working time, mass of thermal storage material, and parameter variations of the two cycles are simulated with the solar radiation diurnal distribution model. 10 organic fluids and 5 representative thermal storage materials are compared in this paper, with the mass and volume of these materials being shown. The longer the continuous working time is, the lower the system thermal efficiency is. The maximum continuous working time can reach 19.1 hours if the system provides a constant power output. At the same time, the system efficiency can be kept above 38% for most fluids.
文摘燃气冷热电联供系统(Combined,Cooling,Heating and Power,CCHP)设备容量及运行策略的整体优化对冷热电联供系统的高效经济运行至关重要。为提高冷热电联供系统的综合性能,提出了一种计及风光储与热泵的冷热电联供系统,采用考虑不同权重因子的综合评价指标,利用建筑模拟分析软件DeST建立山东某区域建筑的建筑模型,得到冷热电风光负荷数据,以综合性能指标为优化目标,采用混合整数线性规划(Mixed Integer Linear Programming,MILP)算法对系统进行优化配置,并与无风光的冷热电联供系统及分供系统进行比较,研究结果表明,本系统综合指标优化结果比分供系统提高47.8%,比常规CCHP系统综合性能提高19.5%。