针对传统太阳能供暖仅集中蓄热系统运行温度高造成集热效率低以及热损失大等问题,提出区域太阳能供暖集中式与分散式组合蓄热系统,建立组合蓄热系统的数学物理模型,利用Matlab平台编写组合蓄热系统模拟仿真程序,并将系统与区域太阳能供暖集中式蓄热系统对比。结果表明：相较于集中式蓄热系统,组合蓄热系统在西宁地区的太阳能保证率提高约36%,且逐月太阳能供热量更稳定;组合蓄热系统总集热效率提高约10%;组合蓄热系统的运行温度降低,其中集中埋地蓄热水体平均温度相较于集中式蓄热系统全年平均降低约17 ℃,热力管网平均温度全年平均降低约27 ℃;组合蓄热系统总热损失减少2.23 TJ,其中热力管网热损失仅为集中式蓄热系统的39%。
Abstract
In response to the problems of low collection efficiency and large heat loss caused by the high operating temperature of traditional solar heating systems that only rely on centralized heat storage, this study proposes the centralized and decentralized combined heat storage systems for district solar heating, establishes the mathematical and physical model of the combined heat storage system, compiles the simulation program of the combined heat storage system using Matlab platform, and compares the system with the centralized heat storage system for district solar heating. The results show that compared to the centralized heat storage system, the solar fraction of the combined heat storage system in Xining Area has increased by about 36%, and the monthly solar heating capacity is more stable. The total heat collection efficiency of the combined heat storage system is increased by about 10%. Compared to the centralized heat storage system, the operating temperature of the combined heat storage system decreases, with the average temperature of the centralized buried heat storage water body decreasing by about 17 ℃ throughout the year, and the average temperature of the heating pipeline network decreasing by about 27 ℃ throughout the year. The total heat loss of the combined heat storage system decreased by 2.23 TJ, with the heat loss of the heating network only 39% of that of the centralized heat storage system.
关键词
太阳能供暖 /
蓄热 /
热泵 /
Matlab /
太阳能保证率 /
集热效率
Key words
solar heating /
heat storage /
heat pump /
Matlab /
solar fraction /
heat collection efficiency
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基金
政府间国际科技创新合作重点专项（2021YFE0113500）; 国家自然科学基金区域创新发展联合基金（U20A20311）
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