该文建立PV/T集热器非稳态传热数学模型,通过现有实验平台实测数据验证模型可靠性后,对水冷型PV/T集热器以及空气/水双流道PV/T集热器性能进行模拟研究;在此基础上,从运行参数角度对双流道PV/T集热器性能进行运行优化。研究结果表明：在太原地区冬季工况下,当水流量为0.01 kg/s时,增设空气流道后双流道PV/T集热器性能优于水冷型PV/T集热器,集热器综合性能效率提高约0.84%。当空气流量一定时,随着水流量从0.01 kg/s增至0.09 kg/s,双流道PV/T集热器综合性能效率增加约9.22%;当水流量大于0.03 kg/s时,增大空气流量会削弱双流道PV/T集热器综合性能。该文经综合考虑建议太原市在冬季工况下双流道PV/T集热器推荐水流量上限值为0.03 kg/s。
Abstract
In this paper, a mathematical model of unsteady heat transfer of PV/T collector was established. After verifying the reliability of the model through the measured data of the existing experimental platform, the water-cooled PV/T collector and the air/water dual-channel PV/T collector were tested. On this basis, the performance of the dual-channel PV/T collector was optimized from the perspective of operating parameters. The results show that under the winter conditions in Taiyuan, when the water mass flow is 0.01 kg/s, the performance of the PV/T collector after adding the air channel is better than that of the water-cooled PV/T collector. The overall efficiency of the device is improved by about 0.84%. When the air mass flow is constant, as the water flow increases from 0.01 kg/s to 0.09 kg/s, the comprehensive performance efficiency of the dual-channel PV/T collector increases by about 9.22%. When the water mass flow is greater than 0.03 kg/s, increasing the air mass flow will weaken the overall performance of the dual-channel PV/T collector. After comprehensive consideration, the paper suggests that the water flow rate of the dual-channel PV/T collector should not be greater than 0.03 kg/s in winter conditions in Taiyuan.
关键词
太阳能集热器 /
综合效率 /
双流道 /
光伏光热 /
运行参数优化
Key words
solar collectors /
overall efficiency /
dual-channel /
PV/T /
operation parameter optimization
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基金
国家重点研发计划（2018YFD1100701）
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