호기성 매립지를 지열원으로 한 열 회수 가능성 평가 (Applicability of Heat Recovery at Aerobic Landfill as a Geothermal Heat Source)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 32권 / 7호 / 705 ~ 712페이지
· 저자명 : 박진규, 조병철, 김인희, 김경, 이남훈

초록

The objective of this paper is to assess the applicability of heat recovery at aerobic landfill as a geothermal heat source.
This paper presents a case study of installing gas source heat recovery system at an aerobic landfill to collect landfill gas heat. The system consists of three subsystems, i.e., the air injection system including a biofilter, the heat pump system and the thermal storage tank. A biofilter is necessary to remove the content of harmful compounds in the gas that enters the heat pump. The field test results showed that temperature for landfill gas was increased slightly from 29 to 38oC in the phase of aeration because of decomposition of organic carbon. The biofilter effectively treated CH4, H2S and NH3 in the gas to prevent the corrosion of the heat pump. The coefficient of performance (COP) of the heat pump was 3.2, which means that 3.2 kW of heat energy could be obtained by 1 kW of electrical energy used for the heat pump. This study estimated the energy cost for the different heating systems. As a result, the heat pump can reduce the energy cost by 75% compared with kerosene and diesel. Therefore, it is concluded that aerobic landfills are a suitable resource for heat recovery.

영어초록

The objective of this paper is to assess the applicability of heat recovery at aerobic landfill as a geothermal heat source.
This paper presents a case study of installing gas source heat recovery system at an aerobic landfill to collect landfill gas heat. The system consists of three subsystems, i.e., the air injection system including a biofilter, the heat pump system and the thermal storage tank. A biofilter is necessary to remove the content of harmful compounds in the gas that enters the heat pump. The field test results showed that temperature for landfill gas was increased slightly from 29 to 38oC in the phase of aeration because of decomposition of organic carbon. The biofilter effectively treated CH4, H2S and NH3 in the gas to prevent the corrosion of the heat pump. The coefficient of performance (COP) of the heat pump was 3.2, which means that 3.2 kW of heat energy could be obtained by 1 kW of electrical energy used for the heat pump. This study estimated the energy cost for the different heating systems. As a result, the heat pump can reduce the energy cost by 75% compared with kerosene and diesel. Therefore, it is concluded that aerobic landfills are a suitable resource for heat recovery.

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