Sizing Off-Grid PV Configurations on Electrical Performance and Electrical Energy Storage in Air Conditioning System Applications
Anisa Ramadhani, Fauzan, Nadia Aulia Rahman, Paulus Sukusno, Yuli Mafendro Dedet Eka Saputra, Haolia Rahman

Politeknik Negeri Jakarta

Abstract

The number of households using air conditioning (AC) systems in tropical climates has significantly increased in a few decades. The off-grid AC-powered solar PV becomes a new option for AC users to reduce electricity costs from existing grid sources. Therefore, optimization is required to size the supporting equipment in off-grid PV installations. This study simulates various equipment configurations such as nominal power (400 Wp, 550 Wp, 500 Wp, and 660 Wp), number of PV units (adjusted to the total load accordingly), and battery arrangement to obtain the performance ratio, losses, and battery performance for AC-powered solar PV applications. We use university classrooms equipped with two units of 1-hp split AC and other supporting typical class-electronic equipment at about 2,168 watts and 18,232 Wh of load and energy consumed per day respectively. The simulation results indicate that a configuration consisting of eight 550 Wp PV panels coupled with a 17.05 Ah Li-Ion battery yields the highest performance ratio, minimizes energy losses, and achieves the most balanced battery performance.

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Topic: Renewable energy