不同截面流道对PV/T系统性能影响的模拟研究

doi:10.3969/j.issn.2097-0706.2022.04.010

摘要/Abstract

摘要：

碳中和背景下,太阳能热泵技术应用前景广阔,针对传统管板式光伏/热（PV/T）集热器的集热效率较低的问题,提出矩形、半圆形、三角形3种新型流道结构,并研究其对PV/T系统性能的影响。使用ANSYS Fluent 2020模拟分析了不同截面形状流道的PV/T系统的工作状况,对PV/T集热器系统进行建模,并使用Matlab/Simulink 2018进行动态仿真,结果显示半圆形和矩形截面流道的综合效果更佳;双向进出口布置能减小压降,提高冷却性能;新型PV/T集热器较光伏电池在1 000 W/m²辐射强度下发电量提高了24%,在环境温度25 ℃时能量综合利用效率达70%以上。

关键词: PV/T, 数值模拟, 流动, 性能, 效率, 集热器, 碳中和, 太阳能热泵

Abstract:

The heat collection efficiency of traditional tube sheet PV/T collectors is low.A study is made on the influence on the performance of PV/T systems brought by three neo structures of flow channels,rectangle,semicircle and triangle. Simulation analysis on the working conditions of a PV/T system with different cross-sectional flow channel is made by ANSYS Fluent 2020.Then,the model for the PV/T collector system is constructed and simulated dynamically by Matlab/Simulink 2018.The research results indicate that the semicircular flow channel and rectangular flow channel performance better,and the two-way arrangement for the inlet and outlet can reduce the pressure drop and improve the cooling performance.The power generated by new PV/T collector is higher than that of a photovoltaic cell by 24% under 1 000 W/m² radiation intensity.At the ambient temperature of 25 ℃,the comprehensive energy utilization rate of the PV/T collector can be over 70%.

Key words: PV/T, numerical simulation, flow, performance, efficiency, heat collector, carbon neutrality, solar heat pump

中图分类号:

TK515

郭光正, 勾昱君, 钟晓晖. 不同截面流道对PV/T系统性能影响的模拟研究[J]. 综合智慧能源, 2022, 44(4): 76-84.

GUO Guangzheng, GOU Yujun, ZHONG Xiaohui. Simulation study on the effect of flow channel's different cross-section on PV/T system performance[J]. Integrated Intelligent Energy, 2022, 44(4): 76-84.

图/表 18

表1

PV/T集热器各层热物理性参数

材料	厚度/mm	密度/（kg $∙$ m^-3）	导热系数/ [W·(m·K)^-1]	比热容/ [J·(kg·K）^-1]
玻璃	3.20	2 500	0.980	84.00
EVA	0.38	840	0.230	2 930.80
Si	0.30	2 330	148.000	712.00
EVA	0.38	920	0.230	2 930.80
TPT	0.15	1 397	0.614	1.38

表1

表2

图1

图2

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图9

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图11

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图14

图15

图16

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参数	数值
导热系数/[W·(m·K)^-1]	0.647
密度/(kg·m^-3)	2 172
比热容/[J·(kg·K)^-1]	327.00