Techno-economic viability of on grid micro-hybrid PV/wind/Gen system for an educational building in Iran. (June 2021)

• Record Type: Journal Article
• Authors: Taghavifar, Hadi; Zomorodian, Zahra Sadat
• Is Part Of: Renewable & sustainable energy reviews. Volume 143(2021)
• Publication Date: 2021-06
• Subjects: Biodiesel-fueled generator -- Building energy simulation -- Techno-Economic evaluation -- Electricity sellback -- Hybrid system -- PV/wind; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2021.110877
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: In this research, a highly potential campus site for solar/wind energy production is identified with the purpose of micro-hybrid system installation in on-grid mode to sellback the excess electricity and hence economize the building as a source of income. A PV/wind/grid and PV/wind/grid/gen system are surveyed techno-economic wise. For case1, the net present cost (NPC) equals to $49, 022, renewable fraction (RF) of 85.5%, and cost of energy (COE) $0.0024 is achieved at an inflation rate of 10% and wind speed of 6.8 m/s. While for the best feasible design of case2 (case2d), the NPC = $224, 430, COE = $0.0272, RF = 63.6% are obtained. The results indicated that for a low inflation rate a simple PV/grid is appropriate and with the increase of inflation, more equipment incorporation to the system is a preferable choice. Increasing the number of wind turbine cause NPC reduction and the wind speed increase leads to COE reduction. The results indicated that the case1 with 10 XL10R and 76.0 kW generator capacity could generate 315000 kWh electricity which means 69.2% expenditure decline compared to when one turbine is used (maximum annual electricity production and minimum NPC). Increment of inflation rate from 10% to 15% at $0.35 biodiesel price, increases the RF from 14% to about 50%. This implies that when the fuel price is low together with the high inflation rate, the renewability of the system is more significant. Highlights: PV/wind and PV/wind/gen in two configurations assessment in educational building. AC-DC electric bus with converter in PV/wind is preferable compared to no converter. The renewable fraction of 85% and 4.5 yr payback is estimated for the optimized case. Adopting the microhybrid system, net 157, 657.6 kW energy is sold back to grid annually. The lowest CO2 and NOx emission achieved meeting thermal/electric load with PV/wind.