Study on the Economic Analysis of Campus-Level Integrated Energy System Based on HOMER Pro Software: China Agricultural University East Campus Example

In this study, HOMER Pro software was used to design and economically analyze the integrated energy system constructed by the East Campus of China Agricultural University. In the design of the integrated energy system, the amount of electricity and natural gas purchased by China Agricultural University in a year is collected. According to the natural geography, climate conditions and new energy types of the regional district, the power supply units of the integrated energy system of the campus are designed to include the power grid, wind power generation, photovoltaic power generation, biomass power generation and lead-acid batteries; the combination of waste heat recovery from biomass generators and gas boilers to jointly supply the heat load of the system can reduce the use of gas, reduce the reliance on a single energy source and improve the utilization rate of resources. With the target of the lowest cost of energy (COE) and net present cost (NPC) for the 20-year design life of the system and the constraint of meeting the energy demand of the East Campus of China Agricultural University, four energy supply scenarios of the East Campus of China Agricultural University were compared and simulated and modeled using Homer software. The objective is to integrate renewable energy sources and calculate the cost of four scenario configurations, the optimal component configuration of this park's integrated energy system under grid-connected conditions, in order to achieve a cost effective integrated energy system operation planning bill. The simulation results show that the scenario with Wind turbine (WT)-Photovoltaic (PV)-Biomas-battery as the energy supply system has the lowest COE and NPC of $0.0671 and $153 million, respectively; in short, after comparing with the local power purchase cost of $0.1, the cost of electricity consumption can be reduced by 32.9%, and most importantly, it helps to create an integrated energy system concept for the park based on new energy sources.