针对阀门卡堵故障对太阳能集热场性能影响进行探讨,通过搭建太阳能集热场阀堵故障实验系统获得阀堵程度与局部阻力系数之间的函数关系ξ=0.0531K1.7351,建立集热场阀堵故障性能仿真模型分析阀堵故障对集热场水力热力影响规律,并提出阀堵故障对集热场水力热力性能综合影响评价指标ECP。研究结果表明,阀门卡堵故障会导致太阳能集热场压力不平衡率显著增加;当卡堵程度超过50%后,供暖期集热量衰减更加明显,同时易出现系统过热问题。此外,在相同的集热面积和故障程度下,集热场支路数量越少,其综合性能影响越严重。
Abstract
To study the effect of valve blockage fault on solar collector field performance, an experimental system was constructed to obtain the functional relationship between the degree of valve blockage and the local resistance coefficient：ξ=0.0531×K1.7351. A comprehensive simulation model was developed to analyze hydraulic and thermal impacts of valve blockage faults on the solar thermal field. The Effective Comprehensive Performance index （ECP） was introduced to evaluate the collective influence on system performance. Research findings indicate that valve blockage significantly amplifies resistance imbalances in the solar collector field. Beyond a 50% blockage degree, there is a notable decline in the imbalance of resistance in the solar collector field, escalating the risk of overheating. Additionally, under the same collector area and degree of blockage, the fewer the number of branch circuits in the collector field leads to the more serious the impact on the overall performance.
关键词
太阳能集热器 /
集热量 /
热力性能 /
水力性能 /
阀门卡堵故障
Key words
solar collectors /
heat-collecting capacity /
thermal properties /
hydraulic performance /
valve blockage fault
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基金
“十四五”国家重点研发计划（2022YFC3802705）; 西藏自治区拉萨市科技计划项目（LSKJ202308）
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