槽式聚光和纳米流体分频PVT系统设计与分析  

Design and Analysis of Parabolic Trough Solar Concentration and Nano-fluid Beam Splitting PVT System

作　　者：王刚[1] 张震 姜铁骝[1] WANG Gang;ZHANG Zhen;JIANG Tieliu(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《工程热物理学报》2025年第1期35-41,共7页Journal of Engineering Thermophysics

基　　金：吉林省自然科学基金学科布局项目(No.20210101081JC)。

摘　　要：本文提出了一种基于槽式聚光器和氧化铟锡/乙二醇纳米流体分频器的新型太阳能光伏/光热系统。制备了氧化铟锡/乙二醇纳米流体并进行了性能测试。结果表明在全波长范围内,氧化铟锡/乙二醇纳米流体的平均透射率和平均吸收率分别为69.1%和30.9%。对光伏/光热系统的光学性能进行分析,结果表明,PVT系统的总体光学效率约为89.38%。当南北方向的对日跟踪误差增加到0.2°时,光伏/光热系统的光学效率为84.14%。对光伏/光热系统进行了运行性能分析,结果表明,光伏子系统的光电转换效率为29.1%,光伏/光热系统整体的理论光电转换效率和系统的热效率分别为19.1%和19%。变参数分析的结果表明,提高光伏/光热系统的热效率可以通过适当增大纳米流体的入口流速、减小纳米流体的入口温度以及减小外部对流换热系数来实现。In this paper,a new solar photovoltaic/thermal system with parabolic trough concentrator and indium tin oxide/ethylene glycol nano-fluid beam splitting is proposed.Indium tin oxide/ethylene glycol nano-fluid is prepared and tested.The results show that the absorptivity and transmittance of the indium tin oxide nano-fluid are 30.9%and 69.1%in the full wavelength range.The optical behavior of the photovoltaic/thermal system is studied and the overall optical efficiency of the system is 89.38%.When the sun tracking error is less than 0.2̊,the photovoltaic/thermal system can have an overall optical efficiency which is greater than 84.14%.The operation performance analysis reveal that the photoelectric efficiency of the photovoltaic subsystem is 29.1%,and the overall photoelectric conversion and thermal efficiencies of the photovoltaic/thermal system are 19.1%and 19%.The thermal efficiency of the system can be improved by increasing the inlet indium tin oxide nano-fluid velocity,or by reducing the inlet indium tin oxide nano-fluid temperature and external convectional heat transfer coefficient.

关 键 词：太阳能 氧化铟锡 纳米流体 槽式聚光器 光伏/光热系统 

分 类 号：TK512[动力工程及工程热物理—热能工程]