Optimal sizing of a stand-alone hybrid system for electric and thermal loads using excess energy and waste heat

Barun K. Das and Mahmudul Hasan

Energy, 2021, vol. 214, issue C

Abstract: This paper examines the capability of meeting the simultaneous electricity and thermal load demand of an off-grid community with different configurations of hybrid system. The studied configurations include the solar photovoltaic, wind turbine, Micro Gas Turbine (MGT) and Li-ion battery. The model considers the utilisation of the excess energy, recovered waste heat, and different power management strategies using Hybrid Optimisation of Multiple Electric Renewables (HOMER) software. With and without waste heat recovery options along with the thermal load controller are examined for meeting heating demand. Different dispatch strategies, namely Load Following (LF) and Cyclic Charging (CC), are studied and compared while sizing the hardware components of the hybrid system. The system performance is also examined under different thermal to electric load ratio. In addition, a comparative analysis between stand-alone and grid-connected option and the effects of different uncertainties are reported. Results indicate that appreciable benefits in cost (NPC due to size reduction of system hardware components), emissions (reduction in CO2 emissions up to around 40%), and renewable penetrations (increase in system renewable energy fraction up to 33%) can be achieved from the optimised hybrid system. The CC strategy offers cost and environmental benefits for all the studied configurations.

Keywords: Excess electricity; Waste heat; Cost of energy; Renewable fraction; CO2 emissions (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (18)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:214:y:2021:i:c:s0360544220321435

DOI: 10.1016/j.energy.2020.119036

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