蒸汽蓄热型冷热电联供系统节能性分析

摘要

Using the method of numerical simulation, the operating characteristics of CCHP system with and without steam heat storage system in design day and air-conditioning season were studied. And with the traditional production system as the benchmark, the energy saving rate of the two systems is obtained. The results show that the performance of the steam heat storage type CCHP system is better than that of the non-thermal energy storage system. but the energy efficiency of the whole air-conditioning season is affected by the energy efficiency ratio of the energy storage cycle and the centrifugal chiller, the longer the storage cycle, the better the system energy saving, the better the energy saving system; the higher the COP is, the lower the relative energy saving rate of the steam heat storage type CCHP system. This paper has guiding significance to design research on regenerative steam CCHP system.%采用数值模拟的方法，对有、无蒸汽蓄热器的冷热电联供系统在设计日和空调季的运行特性进行研究，并以传统分产系统为基准，得到了二者的节能率。结果表明：蒸汽蓄热型冷热电联供系统在设计日的运行效果明显优于无蓄能系统，但在整个空调季运行的节能效果受蓄能周期和离心式冷水机组能效比的影响，蓄热器的蓄能周期越长，系统节能性越好；离心式冷水机组COP越高，蒸汽蓄热型冷热电联供系统相对节能率越低。本文研究对蒸汽蓄热型冷热电联供系统的设计具有指导意义。