Title: Performance evaluation of geothermal assisted VAC systems for residential cooling purposes

Authors: Nurdan Yildirim

Addresses: Department of Mechanical Engineering, Yasar University, Bornova, Izmir, Turkey

Abstract: Nowadays renewable energy sources are being integrated to HVAC-R system to reduce energy consumption of the buildings since buildings have the biggest share of the total energy consumption of nearly every country in the world. In this study, a geothermal assisted cooling system with a vapour absorption refrigeration system having ammonia water or lithium bromide-water solution pair is studied in order to meet 10 kW cooling demand of a 150 m² detached house in Izmir, Turkey. The thermodynamic performances of the refrigeration systems are compared by conducting detailed energy, exergy analyses and parametric studies. The exergetic efficiency of the lithium bromide-water vapour absorption refrigeration system is determined as 30%, while it is 19.8% for ammonia-water vapour absorption refrigeration system. The vapour absorption refrigeration system with lithium bromide-water working pair is a better alternative for the considered house at the base case operating conditions.

Keywords: geothermal cooling; building; VAC; performance assessment; exergy analysis.

DOI: 10.1504/IJEX.2024.138133

International Journal of Exergy, 2024 Vol.43 No.4, pp.345 - 361

Received: 29 Nov 2023
Accepted: 15 Dec 2023
Published online: 29 Apr 2024 *

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