耦合太阳能和地热能的冷热电联供系统优化

天然气和可再生能源互补是一种并行解决环境污染和克服可再生能源不稳定的有效方式,本文提出一种耦合太阳能和地热能的混合冷热电联供(CCHP)系统。基于以电定热(FEL)和以热定电(FTL)运行策略,提出了地源热泵出力比依照逐时电价和季节而变化的运行模式;以一次能源节约率、费用年值节约率以及二氧化碳减排率为目标函数,建立CCHP系统优化模型,运用多目标遗传算法对系统配置及运行策略进行了寻优求解。结果表明:该混合CCHP系统在FEL模式能够实现最优的综合性能.

Optimization of Combined Cooling,Heating,and Power System Coupled With Solar and Geothermal Energies

Complementation of natural gas and renewable energy is an effective way to solve environmental pollution and overcome the instability of renewable energy.In this paper,a hybrid combined cooling,heating and power(CCHP)system coupled with solar and geothermal energy is proposed.Based on the operation strategy of following electric load(FEL)and following thermal load(FTL),the operation mode that the output ratio of ground source heat pump varies according to the hourly electricity prices and seasons is proposed.Taking the primary energy saving rate,annual cost saving rate and carbon dioxide emission reduction rate as objective functions,the optimization model of CCHP system is established,and the system configuration and operation strategy are optimized by using multi-objective genetic algorithm.The results show that the hybrid CCHP system can achieve the best performance in FEL mode.