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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EFFECT OF DISTRIBUTED PHOTOVOLTAIC POWER STATION ON BUILDING COOLING LOAD IN SUMMER

Sheng Liu
College of Mechanical and Electrical Engineering, Hohai University, Changzhou, Jiangsu, 213022; State Key Laboratory of Photovoltaics science and technology, Changzhou, Jiangsu, 213022; Fluids & Thermal Engineering Group, Faculty of Engineering, University of Nottingham, UK

Yuying Yan
Research Centre for Fluids and Thermal Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China; Fluids & Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

Zhen Zhang
College of Mechanical and Electrical Engineering, Hohai University, Changzhou, Jiangsu, 213022

Jianbo Bai
College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China; Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology, Southeast University, Nanjing 210096, China

DOI: 10.1615/IHTC16.nee.021989
pages 7389-7394


KEY WORDS: Solar energy, Conduction, solar PV, building, cooling

Abstract

The distributed photovoltaic power station on flat roof changes the original condition of roof and affects the cooling load induced by conduction through roof. The temperatures of photovoltaic module, original roof and shadowed roof were measured in three typical photovoltaic stations including high incline, low incline and horizon bracket installation method. A mathematic model was built to describe the heat transfer in roof and calculate the conduction through roof. Modification was made for radiation time series method to calculate the cooling load induced by conduction through roof. Cooling loads of continuous sunny days and rainy days were obtained separately. Cooling loads of shadowed roof reduce about 15-20% for high and low bracket installation methods, while about 6% for horizon bracket installation method compared to the original roof in summer. The cooling load of whole roof also relates to roof utility. High roof utility leads a small cooling load under same installation method. Roof with low bracket photovoltaic station has the smallest cooling load in summer. And they are almost the same for roofs with high and horizon bracket PV station.

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