Sizing of a solar and hydrogen-based integrated energy system of a stand-alone house in Izmir

Abstract

The current work presents the design and modeling of a solar and hydrogen energy-based integrated energy system that provides the electricity demand of a stand-alone house located in Izmir, Türkiye. This system is mainly comprised of photovoltaic (PV) cells, battery banks, a PEM electrolyzer (PEM-El), a hydrogen (H2) compressor, and a pressurized hydrogen tank. Electricity produced from PV cells was either used in the PEM-El for hydrogen production or stored in the batteries to meet the required energy during low solar radiation or night time. The H2 produced by the electrolyzer was pressurized with a compressor and stored in pressure tanks at a pressure of 350 bar. A zero-dimensional (0-D) mathematical approach was applied for the system component modeling. An energy management strategy was incorporated into the model to investigate the dynamic behavior of the integrated system. Parametric studies were then conducted for different numbers of PV and batteries. It was found that the amount of hydrogen produced is higher in summer (28.58 kg with 20 PV-30 batteries in June, 47.69 kg with 30 PV-20 batteries in July, and 66.96 kg with 40 PV-30 batteries in August). On the other hand, hydrogen produced is lower in winter (11.60 kg with 20 PV-10 batteries in December, 21.82 kg with 30 PV-20 batteries in January, and 32.20 kg with 40 PV-30 batteries in February). In addition, an economic analysis was conducted for the hybrid system.