100kW급 건물지붕형 태양광발전시스템 출력특성 연구

Abstract

As worldwide problems, such as instability of oil price, depletion of fossil fuel, climatic change and environmental pollution, are becoming serious, the issues on the alternative energy and clean energy have been rising. In the case of South Korea, as environmental pollution, oil crisis and an accident in nuclear facility have happened, existing problems on energy security and destruction of environment have been brought up, and these problems became a political and social issue in South Korea. Therefore, there has been more attention to renewable energy source and this energy source is highlighted as an alternative way to solve the problems. In the case of Europe that led the demand of the early renewable energy, they built dispersed power station that produce electricity in area where electricity is needed rather built a power plant on a large scale. It is anticipated that small scale of sunlight generation will be occupied 48% of the whole pie, and the demand of sunlight in America continent makes up more than a half of the whole demand around the world. New Energy Finance predicts that a scaled of worldwide renewable energy market will be above 100GW and will reach around 235GW a year by 2030. It is also anticipated that quantity of installation of the renewable energy plant will reach by 2995GW. Now, it is expected that Asia will have the biggest demand of renewable energy as well as thermal power along with the development of economy. Thus, it is also estimated that the demand of the sunlight in Asia will be reaching around 894GW, and this amount is going to be 50% of the whole pie. The demand of wind power including offshore wind power in Asia will be around 502GW, and it will be 1400GW of the demand in sunlight and wind power all together. Therefore, Asia’s demand of renewable energy will be 47% of all, and this will be the biggest scale among the globe. The Building integrated photovoltaic system, (BIPV), where solar panels covered with photovoltaics are embedded to certain parts of a building. Such parts can include floors, roofs (slanted or horizontal), rooftops, walls (interior or exterior), windows, doors, awnings and facade. This system, the panels peplacing the building parts mentioned above, enables to cut spending twice. the system where the panels are fixed via a stand, mostly on rooftops. This system is suitable for large buildings such as schools, research facilities, or factories. Since the angle of the panels can be set relatively freely, it can maximize the efficiency of the power generation according to the place where the building is located by finding the “optimized angle”, hence the economic feasibility. This thesis investigates in detail the characteristics of the photovolatic power generation system, in an environment where solar panels are fixed to stands which are installed on building rooftops. For this purpose, two groups of photovoltaic modules with similar energy-producing capacities (45 and 54 kW, respectively) are installed on rooftops of separate buildings. The power generation pattern corresponding to a number of variables is then studied, based on the time-series analysis on the output of daily and monthly data, through checking dependence on the incident angle of the ray. For this, the module groups were divided into two categories: The first one with panels that are horizontal to the ground and the second one with those tilted by 25° from it, and by probing the relation of the power output and the atmospheric temperature.