中文摘要：

以天然气为燃料,燃气轮机驱动的建筑冷热电联供系统是分布式能源系统的主要形式之一。将蓄能与联供系统相结合,可有效改善系统变工况性能,对系统起到减容增效的作用。本文提出蓄热完善度的概念,用以评价实际相变蓄能与理想蓄能在热性能上的差异,并分析其对系统整体能耗的影响。通过建立简化的系统模型,以系统一次能耗最小为优化目标,求得最佳相变温度的解析表达式,对实际相变蓄能型联供系统优化设计具有一定指导意义。

英文摘要：

Natural gas-driven building cooling heating and power（BCHP）system is a typical form of distributed energy system.Integrating thermal energy storage（TES）equipment with BCHP system proves to be an effective way to improve its performance.In this paper,a new concept,heat storage perfectness,is proposed,to evaluate the thermal performance difference between practical TES with phase change materials（PCM）and ideal one,and investigate its influence on the primary energy consumption of the whole system.Aiming to minimize the primary energy consumption,the analytical optimal phase change temperature is obtained,based on the established simplified system model.This work is of great significance in guiding the design of practical PCM-TES-BCHP system.