跨季蓄热多方式可调节供暖系统的模拟分析及可行性研究

Simulation analysis and feasibility study of multi-mode adjustable heating system with seasonal heat storage

针对太阳能跨季蓄热量利用不充分的问题,提出了一种多方式可调节供暖系统模型,利用温差控制原理实现系统供暖方式的自动转换。以乌鲁木齐地区某公共建筑为例,采用TRNSYS动态模拟软件对多方式可调节供暖系统进行了全年运行分析。结果表明:15100 m^(3)的蓄热基坑体积与6040 m^(2)的集热器面积恰好匹配;在非供暖期蓄热基坑内储存的7528.11 GJ热量可承担85.06%的建筑热负荷,剩余的14.94%由电能供给;在相同建筑热负荷的情况下,与传统供暖系统相比,采用多方式可调节供暖系统可节省标准煤256.84 t、天然气211520.09 m^(3);整个采暖期内的平均太阳能保证率可达到73%。

Aiming at the problem of insufficient utilization of seasonal heat storage,a multi-party adjustable heating system model is proposed,and the automatic conversion of heating mode is realized by using the principle of temperature difference control.An example of a public building in Urumqi area is given,and dynamic simulation software TRNSYS used to analyze the operation of multi-mode adjustable heating system throughout the year.The results show that the volume of the heat storage pit is 15100 m^(3),which exactly matches the size of the collector area of 6040 m^(2).In the non heating period,the heat stored in the foundation pit can reach 7528.11 GJ,which can bear 85.06%of the building heat load,and the remaining 14.94%is supplied by electric energy.Compared with the traditional heating system,under the same building heat load,the multi-mode adjustable heating system can save 256.84 t of fossil fuel standard coal and 211520.09 m^(3) of natural gas.The average solar energy guarantee rate in the whole heating period can reach 73%.