Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on the Safety Code Development of Gas Engine Micro Combined Heat and Power System

소형 가스엔진 열병합 발전시스템 안전기준 개발

  • Kwon, Jun-Yeop (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Min-Woo (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lee, Jung-Woon (Institute of Gas Safety R&D, Korea Gas Safety Corporation)
  • 권준엽 (한국가스안전공사 가스안전연구원) ;
  • 김민우 (한국가스안전공사 가스안전연구원) ;
  • 이정운 (한국가스안전공사 가스안전연구원)
  • Received : 2021.06.04
  • Accepted : 2021.08.26
  • Published : 2021.08.31
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Abstract

Recently, as a solution to the sharp drop in "power reserve ratio", it is being converted to a microgrid that enables bi-directional transmission and distribution. A microgrid is composed of a small-scale distributed power supply and a load. As a representative technology of distributed power generation, there is a Micro Combined Heat and Power system applied to homes and buildings. In this study, a safety standard was developed by dividing the power generation system, cooling system, lubrication system, and exhaust system to derive safety standards for a small gas engine power generation system with a gas consumption less than 232.6kW (200,000 kcal/h). In the case of the power generation system, a filter was installed and the system was stopped by detecting gas leakage and abnormalities in engine speed or output and the cooling system is stipulated to stop the system in case of insufficient cooling water or overheating. The lubrication system monitors the pressure and temperature of the lubricating oil and stops the system when an abnormality occurs, and the exhaust gas emission concentration regulation value was specified in accordance with domestic and foreign standards. Through the results of this study, it is judged that the safety of the gas engine power generation system can be improved and it can contribute to the commercialization of products.

최근 "전력 예비율" 급감에 대한 해결책으로 양방향 송배전이 가능한 마이크로 그리드로 전환되고 있다. 마이크로 그리드는 소규모 분산전원과 부하로 구성되는데, 분산전원의 대표적인 기술로 가정·건물에 적용하는 소형 열병합 발전시스템이 있다. 본 연구에서 가스 소비량 232.6kW(20만 kcal/h) 이내의 소형 가스엔진 발전시스템의 안전기준을 도출하고 발전 시스템, 냉각시스템, 윤활 시스템, 배기 시스템으로 구분하여 안전기준(안)을 개발하였다. 발전시스템의 경우 필터를 설치하고 가스 누출 및 엔진 회전수나 출력에 이상이 발생할 경우 이를 감지하여 시스템이 정지하도록 하였고, 냉각시스템은 냉각수 부족이나 과열이 발생할 경우 시스템이 정지하도록 규정하였다. 윤활 시스템은 윤활유의 압력과 온도를 모니터링 하고 이상이 발생할 경우 시스템을 정지하도록 하고, 배기 시스템은 국내·외 기준과 부합하여 배기가스 배출 농도 규제 값을 지정하였다. 본 연구 결과를 통해 가스엔진 발전시스템의 안전성을 향상시키고 제품 확산·보급에 이바지할 수 있다고 판단한다.

Keywords

Acknowledgement

본 연구는 2018년도 정부(중소기업청)의 재원으로 WC300 프로젝트 기술개발지원사업의 지원을 받아 수행된 연구입니다.(No.S2563281, 소형 분산 열병합 발전시스템 개발)

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