Energy efficiency evaluation of a hybrid energy system for building applications in a Mediterranean climate and its feasibility aspect. (October 2015)

• Record Type: Journal Article
• Authors: Nižetić, S.; Duić, N.; Papadopulos, A.M.; Tina, G.M.; Grubišić-Čabo, F.
• Is Part Of: Energy. Volume 90:Part 1(2015)
• Page Start: 1171
• Page End: 1179
• Publication Date: 2015-10
• Subjects: Hybrid energy system -- Heat pump -- Photovoltaics -- Energy efficiency -- LCOE (Levelized cost of produced energy) analysis -- Renewable energy; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2015.06.053
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: This paper deals with the analysis of a specific HYS (hybrid energy system) from an overall energy efficiency aspect and also from an economical aspect. The hybrid energy system was purposely assembled from standard, market available energy technologies that are presently used in majority of building facilities, particularly in residential ones. Based on the previous aspect, the HYS was assembled using a standard split heat pump system (air-conditioning unit) with an integrated accumulation boiler for hot water preparation and using a small PV (photovoltaic) system. An overall energy efficiency analysis showed the HYS system to be highly energy efficient on average as overall energy efficiency ranged from 50% up to over 200% (the heat pump system acts as a kind of efficiency booster). An LCOE (Levelized cost of produced energy) analysis showed that the HYS produced energy cost ranged from 0.035€/kWh up to 0.15 €/kWh, in correspondence with overall working time, the average coefficient performance achieved by the heat pump system and in investment conditions. A detailed energy efficiency and feasibility analysis showed that the herein analyzed HYS can be a viable option for small or medium building applications in mild climates. Highlights: Energy efficiency analysis was conducted for a specific HYS (hybrid energy system). The HYS consists of a modified split heat pump unit, driven by a PV system. Gained results showed relatively high energy efficiency values for the HYS. LCOE analysis was conducted to determine HYS economic viability. The calculated price of produced energy by HYS is competitive.