区域太阳能供暖集中式与分散式组合蓄热系统形式探讨
Discussion on forms of a centralized and decentralized combined heat storage system for district solar heating
摘要：
传统区域太阳能供暖系统通常采用集中式蓄热水体,往往难以兼顾由于供暖末端不同造成的热用户用热品位的差异,而以区域内高温用热末端的供水温度确定供暖系统水温,导致区域太阳能供暖系统运行温度偏高,从而造成集热系统效率低、蓄热和输送热损失大等问题。基于此,本文提出了区域太阳能供暖集中式与分散式组合蓄热系统,介绍了该系统的工作原理,分析了组合蓄热系统与传统蓄热系统的特征与区别,探讨了组合蓄热系统运行特性、分散水箱分布形式、容量设计与匹配、运行调控策略及综合效益评价等方面需研究的关键问题。
Abstract：
Centralized heat storage water bodies are commonly used in traditional district solar heating systems, which often makes it difficult to balance the differences in heat consumption grades among different heat users due to different heating ends. The water supply temperature of the heating system is determined by the water supply temperature of the high temperature heat-using end in the region, which leads to the high operating temperature of the district solar heating system, resulting in the low efficiency of the solar heat collection system and the large loss of heat storage and transmission. Based on this, this paper proposes a centralized and decentralized combined heat storage system for district solar heating, and presents the operating principle of the system. It analyses the characteristics and differences between the combined heat storage system and traditional heat storage systems, and explores key issues that need to be studied in terms of the operating characteristics of the combined heat storage system, the distribution form of decentralized water tanks, capacity design and matching, operating control strategies, and comprehensive benefit evaluation.
Keywords:solar heating; combined heat storage; seasonal long-term heat storage; capacity matching; comprehensive evaluation