Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Thermoeconomic Analysis of Hybrid Desiccant Cooling System Driven by District Heating

지역난방에 연계된 하이브리드 제습냉방시스템의 경제성 분석

  • Ahn, Joon (School of Mechanical Systems Engineering, Kookmin Univ.) ;
  • Kim, Jaeyool (Dept. of Mechanical Engineering, Graduate School, Kookmin Univ.) ;
  • Kang, Byung Ha (School of Mechanical Systems Engineering, Kookmin Univ.)
  • 안준 (국민대학교 기계시스템공학부) ;
  • 김재율 (국민대학교 대학원 기계공학과) ;
  • 강병하 (국민대학교 기계시스템공학부)
  • Received : 2014.01.06
  • Accepted : 2014.07.14
  • Published : 2014.09.01
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Abstract

A hybrid desiccant cooling system (HDCS) that uses a heat pump driven by district heating instead of a sensible rotor can provide an increased energy efficiency in summer. In this paper, the summer operation costs and initial costs of both the HDCS and traditional systems are analyzed using annual equal payments, and national benefits are found from using the HDCS instead of traditional systems. In the analysis results, the HDCS reduces the operation cost by 30 compared to the traditional systems, and each HDCS unit has 0.079 TOE per year of primary energy savings and 0.835 $TCO_2$ per year of $CO_2$ emission reduction more than the traditional systems. If HDCSs were to be installed in 680,000 households by 2020, this would produce a replacement power effect of 463 MW. Despite this savings effect, HDCSs require a government subsidy before they can be supplied because the initial cost is higher than that of traditional systems. Thus, this paper calculates suitable subsidies and suggests a supply method for HDCSs considering the national benefits.

지역난방에 연계한 하이브리드 제습냉방 시스템은 하절기 에너지 이용효율을 높일 수 있다. 실증실험을 통해 우리나라에 성공적으로 운전될 수 있다는 것을 확인한 하이브리드 제습냉방 시스템의 보급활성화를 위하여 경제성 분석을 실시하였다. 기존의 전기 에어컨과 냉방을 하면서 생기는 비용을 비교하는 것과 전기 에어컨을 제습냉방으로 대체하였을 때 발생하는 국가 편익을 계산하는 두 가지 관점에서 수행하였다. 분석결과 제습냉방은 30% 이상의 운전비용 절감효과가 있으며, 1기당 연간 0.079 TOE의 1차 에너지, 0.835 $TCO_2$ 절감효과가 있는 것으로 분석되었다. 2020년까지 68만세대에 제습냉방이 보급된다고 예상하면 463 MW의 전력대체 효과가 발생하는 것으로 분석되었다. 이러한 운전비용절감효과, 1차 에너지 절감 및 온실가스 배출 감소효과를 가지고 있는 제습냉방 시스템은 전기 에어컨에 비하여 초기 투자비용이 높기에 보급활성화를 위하여 적절한 정부의 보조금이 필요하다. 본 논문에서는 국가적 편익을 고려한 적절한 보조금을 산정하여 제습냉방 시스템의 보급방안을 제시하고자 한다.

Keywords

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