지하수열원 히트펌프 시스템을 활용한 열배관망 밸런스 운전에 관한 연구

Abstract

Today's world witnesses a pressing rise in global energy and environmental concerns, prompting a focused approach toward achieving Net Zero emissions as a viable solution. This pursuit aims to minimize carbon dioxide emissions from human activities, striving for an ultimate emission level of zero. This study emphasizes the significance of thermal energy in this quest for carbon neutrality. Presently, thermal energy constitutes over half of final energy consumption and contributes substantially to greenhouse gas emissions. As a result, there's growing interest in thermal networks as efficient systems using renewable energy sources to provide heat and generate power. Specifically, this research concentrates on an underground thermal network utilizing a ground-source heat pump system. This innovative system efficiently transfers heat among various buildings or facilities, enhancing energy efficiency while remaining environmentally friendly and economically viable. The study focuses on three primary objectives: Firstly, it calculates heating demands at empirical sites from 2013 to 2022, designing site-specific balanced operation controls that demonstrated minimal dispersion and standard deviation concerning target temperature versus power consumption. Secondly, through exergy analysis, it determines the optimal setting temperature for the heat pump's thermal storage unit to maximize its performance. Lastly, a comparative analysis between energy consumption and greenhouse gas emissions from a fuel oil boiler versus a ground-source heat pump showed a significant 48.4% reduction in emissions when using a ground-source heat pump. These findings propose efficient control methods for diverse sites sharing a single heat source, paving the way towards achieving carbon neutrality. Additionally, the study explores potential applications of decentralized energy and the establishment of thermal energy trading business models within diverse energy systems.