Performance Analysis of a Building Heating System using Underground Source Heat Pump and Photovoltaic Thermal Collector

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

2 Head of Department of Mechanical Engineering Research Laboratory of Renewable Energies and Electromagnetic Fluids, Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

Abstract

This study investigates the performance evaluation of a building heating system equipped to underground storage tank heat pump and photovoltaic thermal collector. The system consists of an underground spherical tank, a photovoltaic thermal collector and a heat pump. The performance evaluation of the combined system is carried out from the energy and exergy perspective. Developing energy balance for various components of the system, the analytical relations for water temperature    of the auxiliary tank, solar cell temperature, absorber plate temperature and the useful heat gain of photovoltaic thermal collector are obtained. The output electrical power of photovoltaic module is calculated by the four-parameter current-voltage model. By writing the exergy balance for the various components of the system, their irreversibility is specified. The validation of the simulation results is carried. The obtained results indicate that the energy and exergy efficiency is maximum for the collector number of 65 and mass flow rate of 0.25 kg/s. The decrease in storage tank volume causes a decrease in water temperature. The increase of 30% in the collector number causes an increase of 25% in water temperature. The highest and lowest water temperature of the tank is observed on the ground of coarse graveled and granite, respectively.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 9
December 2020
Pages 2403-2424

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