• Research Article

    Review on Data Acquisition of Renewable Power Generators

    신재생발전기의 데이터 취득방안에 대한 고찰

    Lee Bong-Kil, Kim Wan-Hong, Choi Joon-Ho

    이봉길, 김완홍, 최준호

    In accordance with the Government’s policy, renewable power generation is expanding very largely. This leads to increasing uncertainty in the power ... + READ MORE
    In accordance with the Government’s policy, renewable power generation is expanding very largely. This leads to increasing uncertainty in the power market and power system owing to the intermittent and fluctuating output characteristics of renewable power generators. Data on the acquisition of renewable power generators can be largely classified according to the operation of the power market and power system. Data on the settlement for the payment for the power amount are acquired in the power market, and real-time data for monitoring the status and output of the generators are acquired in the power system. However, renewable power generators operating in the power market have different acquisition cycles depending on the method of communication of the power meter. They acquire data only for settlement purposes and have no real-time data, which requires improvement. In this paper, the acquisition status is reviewed by classifying the data of renewable power generators into settlement and real-time data. In addition, measures and acquisition criteria for real-time data of renewable power generators for improving the acquisition method are proposed. - COLLAPSE
    June 2020
  • Research Article

    Analysis of Energy Saving Effect of the Residential BESS Connected to the Balcony-PV in Apartment Houses

    공동주택 발코니 PV 연계 가정용 BESS의 에너지 절감 효과 분석

    Kim Cha-Nyeon, Eum Ji-Young, Kim Yong-Ki

    김차년, 엄지영, 김용기

    The government mandates gradually zero energy building and Photovoltaic power generation systems installed in buildings are emerging as the most realistic alternative ... + READ MORE
    The government mandates gradually zero energy building and Photovoltaic power generation systems installed in buildings are emerging as the most realistic alternative to increase the independence rate of building energy. In this study, we propose a method to reduce the power consumption of households by increasing the PV capacity of balconies and applying the method used the charged electric power stored in batteries after sunset. In order to evaluate the electric power energy savings of the residential BESS, a balcony PV 1.2 kW and a battery pack 2 kWh were installed for 9 houses in 4 apartments in Seoul and Gyeonggi-do. The BESS is charged when the balcony PV is generated electric power, and when solar power generation is finished, it supplies power to the electric appliances connected to the load. As a result of installing the solar PV module 1.2 kW and 2 kWh class BESS for 3 households located in Seoul and Gyeonggi-do, the average electric power consumption saving rate was 40%. The reduction in electricity consumption in the case of zero generation surplus power by maximizing the utilization rate of BESS has been improved to about 53%. Therefore, in order to increase the self-sufficiency rate of electric energy in apartment houses, it is effective to increase the solar photovoltaic capacity of the balcony and apply the residential BESS. In the future, it is believed that the balcony PV and home BESS will play a key role in achieving mandatory zero-energy housing. - COLLAPSE
    June 2020
  • Research Article

    A Study on the Institutionalization of Energy Efficient Operation and Maintenance Program for Existing Buildings

    기존 건축물의 운영단계 에너지효율 개선을 위한 관리 및 제도화 방안 연구

    Cho Jinkyun, Lee Youngjae

    조진균, 이영재

    Operational energy is the energy that is used during the occupancy stage of building life cycle. It is associated with relatively longer ... + READ MORE
    Operational energy is the energy that is used during the occupancy stage of building life cycle. It is associated with relatively longer proportion of infrastructure's service life and can constitute 80-90% of the total energy. Assessing the energy use in buildings is essential since they are significant contributors to energy demand. In this regard, energy performance of buildings has become the focus of many regulations. This paper aimed to review the regulations about the energy performance of buildings during their operational stage in Korea. For energy efficient operation program for existing buildings, governments should implement policies and support voluntary programs that rely on collecting and managing building performance data and using this data to inform public and private-sector operation and maintenance strategies. Implementing these policies and programs requires tools and processes for collecting, curating, managing, analyzing, and publishing this data. Energy assessment tool, that is a data resource management tool that enables to assess energy use across the entire portfolio of buildings, is also required. - COLLAPSE
    June 2020
  • Research Article

    Estimation of Optimal Angle for PV Panels Considering Building’s Shadow in Daejeon

    대전지역 건물음영을 고려한 PV 최적각도 산정

    Lee Jung-Tae, Kim Hyun-Goo, Kang Yong-Heack, Yun Chang-Yeol, Kim Chang Ki, Kim Jin-Young, Kim Bo-Young

    이정태, 김현구, 강용혁, 윤창열, 김창기, 김진영, 김보영

    By blocking irradiance, shadows cast by high-rise buildings in urban areas can reduce the power generation efficiency of PV panels installed on ... + READ MORE
    By blocking irradiance, shadows cast by high-rise buildings in urban areas can reduce the power generation efficiency of PV panels installed on low-rise buildings. As the conventionally installed PV panel is not suitable for the urban environment, which is unfavorable for power generating, a more radical solution is required. This study aims to help solve this problem by estimating the optimal PV panel angle. Using the proposed method, the optimal PV angle was calculated by considering shadows that could be cast by nearby buildings throughout the year, and the correlation between solar shading and elevation angle was discovered based on the calculated data. - COLLAPSE
    June 2020