针对室外环境参数波动变化以及蓄热系统温度波动特性,提出一种太阳能集热系统变流量运行调控策略,建立最优流量优化模型,回归得到不同工况下最优流量值多项式函数,并与定流量运行策略下的系统运行性能进行对比分析。结果表明：与定流量运行方式相比,采用变流量调控策略时,集热系统净收益显著提升。对于拉萨地区100 m2串并联形式平板太阳能集热系统,采用变流量运行策略时,虽然运行泵耗增加,但集热量增益更大,相比单位集热面积流量为0.02 m3/（h·m2）时,集热系统净收益增加了468.7 MJ,提高了6.75%。
Abstract
According to the fluctuation of outdoor environmental parameters and the temperature fluctuation characteristics of heat storage system, a variable flow operation control strategy of solar collector system is proposed. An optimal flow optimization model was established, and the optimal flow value polynomial function under different operating conditions was regressed. The system operation performance under the constant flow operation strategy was compared and analyzed. The results show that compared with the constant flow operation mode, the net income of the solar collector system is significantly improved when using the variable flow control strategy. For the 100 m2 series parallel flat plate solar collector system in Lhasa, when the variable flow operation strategy is adopted, although the pump consumption increases, the heat collection gain is greater. Compared with the unit heat collection area flow rate of 0.02 m3/（h·m2）, the net income of the collector system increases by 468.7 MJ and 6.75%.
关键词
太阳能系统 /
平板太阳能集热器 /
太阳能集热量 /
变流量运行 /
流量调控 /
运行能耗
Key words
solar system /
flat-plate solar collector /
solar heat collection /
variable flow operation /
flow control /
operating costs
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基金
政府间国际科技创新合作重点专项项目（2021YFE0113500）; 国家自然科学基金联合基金项目（U20A20311）
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