区域能源系统一次能源梯级利用优化设计方法

Optimal design method for primary energy cascade utilization in a district energy system

以上海某商务区区域能源项目为例,介绍了区域供冷供热系统、燃气冷热电三联供系统、辅助供冷供热系统和蓄能系统。详细介绍了空气源热泵与水源热泵串级供热系统、低温余热回收利用系统,并对系统总投资、运行能效与运行成本进行了分析。设计遵循燃气冷热电三联供系统电能自发自用为主、上网售电为辅,发电余热利用最大化的原则,即利用水源热泵机组深度回收低温余热,实现能源梯级利用优化,节能减排效果显著。

Taking a district energy system of a business district in Shanghai as an example, presents the district cooling and heating system, gas combined cooling heating and power system （gas CCHP）, auxiliary cooling and heating system and energy storage system. Elaborates the air-source and water-source heat pumps cascade heating system, low temperature waste heat recovery and utilization system, and analyses the total system investment, operational efficiency and operating costs. Principles of the design is the self-generated power for self-use as priority and secondly for on-grid sale and to maximize the utilization of exhaust heat by recycling the exhaust heat through water-source heat pump, so as to realize the maximum effect of energy cascade utilization, and remarkable success in energy saving and emission reduction.