Jinyoung Song

Analysis of photovoltaic potential at abandoned mine promotion districts in Korea

The present study analyzed the photovoltaic (PV) potentials at seven abandoned mine promotion districts in Korea: Taebaek, Samcheok, Jeongseon, Yeongwol, Mungyeong, Hwasun, and Boryeong. A PV system with a capacity of 99 kW was considered at each abandoned mine promotion district. The estimated electric power productions and economic effects of PV systems were analyzed using RETScreen software developed by Natural Resources Canada (NRC). The results showed that the Boryeong district has the highest PV potential, with estimated electric power production of about 83.43 MWh/year, which means a present net value of 69.2 million KRW and a payback period of about 13 years.

Analysis of wind power potentials at abandoned mine promotion districts in Korea

Abstract This study assessed the wind power potentials at seven abandoned mine promotion districts in Korea. The wind power system with a capacity of 2 MW was considered at each district. The meteorological data measured by National Institute of Meteorological Research in Korea were used to determine the representative values of wind data at each district. The estimated electric power productions and economic effects of wind power systems were analyzed using RETScreen software developed by Natural Resources Canada. The results showed that the Taebaek district has the highest wind power potential where the estimated electric power production is about 3642 MWh/year, the net present value is 8984 million KRW, and the payback period is about 5.3 years.

Evaluation of rooftop photovoltaic electricity generation systems for establishing a green campus

This study employs geographic information systems (GIS) and the system advisor model (SAM) to assess the potential for rooftop photovoltaic (PV) generation in establishing a green campus. A university campus was taken as the subject area for the research. First, shadow analyses were conducted using a digital elevation model (0.1 m grid spacing) of the study area and the heights of buildings therein. GIS-based spatial analysis tools were used to analyze shadows and their overall patterns. Local conditions at winter solstice were used as a basis for conservative shadow analysis, giving an estimate that 1800 PV modules could be installed on the rooftops of 19 buildings. The SAM was used to conduct energy simulations, based on weather data from the Korea Solar Energy Society. The results indicated that the PV system could produce an estimated 300,269 kWh of energy annually on the campus. Net present value (accounting for inflation and the 20-year operational lifetime of the PV system) showed that economic gain was unlikely at present electricity costs and inflation rates. However, economic gain varied considerably according to the orientation of the PV modules. Southward orientation was expected to give economic returns at an electricity cost of 161 KRW/kWh. Those sites where southward orientation of the solar panels was not possible showed reduced potential for economic return.