碳系复合纳米流体于光伏/光热集热器中的应用  

Research on the application of carbon composite nanofluids in photovoltaic photothermal collectors

作　　者：勾昱君 赵海川 安越 符永琪 Gou Yujun;Zhao Haichuan;An Yue;Fu Yongqi(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063200,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063200

出　　处：《可再生能源》2025年第4期449-457,共9页Renewable Energy Resources

基　　金：北京市自然科学基金(3172040);中国科学院战略性先导科技专项资助。

摘　　要：与其他纳米流体相比,碳系纳米流体具有较高的传热系数,且价格较为低廉,其中石墨烯纳米流体具有较高的传热系数,但稳定性较差,而还原氧化石墨烯纳米流体具有较好的稳定性。文章通过两步法研发了一种新型的碳系复合纳米流体(水基石墨烯/还原氧化石墨烯复合纳米流体)作为光伏/光热集热器中的传热介质,分析了辐射强度、流速以及纳米流体的复合比例对光伏/光热集热器出口水温的影响。实验结果表明:辐射强度越高,流速越快,光伏/光热集热器出口水温越高,纳米流体的传热效果越佳;当复合比例为8:2时,纳米流体的传热效果最佳,光伏/光热系统的热效率和电效率分别为23.49%和20.18%。相较于水基石墨烯和还原氧化石墨烯纳米流体,文章研发的复合纳米流体传热效果更佳。该研究为碳系纳米流体作为传热介质提供实用参考。Carbon-based nanofluid has a higher heat transfer coefficient than other nanofluids and is relatively cheap.Graphene nanofluid has a high heat transfer coefficient,and reduced graphene oxide nanofluid has good stability.So,this article developed a new type of carbon-based composite nanofluid(water-based graphene/reduced graphene oxide composite nanofluid)as the heat transfer medium in PV/T collectors by two-step method.The radiation intensity,flow rate,and composite nanofluid were analyzed.The effect of proportion on the water temperature at the outlet of the collector was studied,and the proportion of water-based graphene/reduced graphene oxide with better heat transfer performance was obtained in different compound proportion ranges of the experiment.Experimental results show:the higher the radiation intensity,the faster the flow rate,the higher the water temperature at the outlet of the PV/T collector,the better the heat transfer effect of the nanofluid;when the composite ratio is 8:2,the heat transfer effect of the nanofluid is the best,the thermal efficiency and electrical efficiency of the PV/T system are 23.49%and 20.18%respectively.Compared with water-based graphene and reduced graphene oxide,nanofluid has better heat transfer effect.The research of this article provides reference for the practical development of carbon nanofluids in heat transfer media.

关 键 词：光伏/光热 纳米流体 复合比例 液冷型 

分 类 号：TK519[动力工程及工程热物理—热能工程]