A Conceptual Strategy to Control the Cell Temperature in a Concentrating Photovoltaic/Thermal Roof-top System

Li, W., Baig, H., Paul, M.C. , Mallick, T.K. and Knox, A.R. (2017) A Conceptual Strategy to Control the Cell Temperature in a Concentrating Photovoltaic/Thermal Roof-top System. 13th Photovoltaic Science, Application and Technology Conference (PVSAT-13), Bangor, UK, 5-7 Apr 2017.

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In this work, a concentrating photovoltaic/thermal (CPV/T) solar collector is analysed, and a conceptual strategy to control the solar cell temperature, while extracting maximum thermal energy under varying outdoor conditions is presented. A full 3D optical-thermal transient analysis on ANSYS CFX is also performed and the system’s performance is demonstrated. Relationship between the water flow rate and solar irradiance for a fixed solar cell temperature is initially established and an algorithm is prescribed to control the solar cell temperature with changing outdoor conditions. Finally, a relationship for the water flow rate with an aim to control the overall mean cell temperature at 25oC is developed and implemented in the model consisting of 27 CCPCs(crossed compound parabolic concentrator) with 27 PV cells and a tube heat exchanger beneath them. Results indicate that the linear flow rate control strategy, by which the flow rate increases from 0 L/min to 1.04L/min and then maintained, leads to the variation of the mean cell temperature of only about 3oC. While this variation is about 10oC without any flow control, this thus proves that the proposed method is an effective strategy to control the mean cell temperature in the concentrating PV/T roof-top system.

Item Type:Conference or Workshop Item
Glasgow Author(s) Enlighten ID:Knox, Professor Andrew and Li, Dr Wenguang and Paul, Professor Manosh
Authors: Li, W., Baig, H., Paul, M.C., Mallick, T.K., and Knox, A.R.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
614241Scalable Solar Thermoelectrics and Photovaltaics (SUNTRAP)Andrew KnoxEngineering & Physical Sciences Research Council (EPSRC)EP/K022156/1ENG - ENGINEERING ELECTRONICS & NANO ENG