Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Suggestion for a New Exergy-Based Heat-Tariff Assessment for a District-Heating System

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  • Moon, Junghwan (Technology Team, Samsung C&T Corporation) ;
  • Yoo, Hoseon (Department of Mechanical Engineering, Soongsil University) ;
  • Lee, Jae-Heon (Department of Mechanical Engineering, Hanyang University) ;
  • Moon, Seungjae (Department of Mechanical Engineering, Hanyang University)
  • Received : 2017.01.24
  • Accepted : 2017.02.20
  • Published : 2017.04.10
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Abstract

In this study, the exergy that can be reflected in the energetic and economic values was used to assess the heat tariff of a district heating (DH) system instead of the enthalpy. It is difficult to directly apply the exergy to the current heat-charge system because of the complicated calculation; therefore, the difference between the supply and return temperatures was converted to the exergy-temperature difference for the ease of the heat-amount calculation. As a result of the exergy analysis for a DH substation, the exergy-temperature difference did not affect the surrounding temperature and pressure loss. The supply temperature and the maximum difference between the supply temperature and the return temperature exerted the main effect on the exergy-temperature difference. The new heat charge of a DH user was slightly reduced in winter compared with the previous charge, but the heat charges in the other seasons are almost the same. It is concluded from the assessment of the heat tariff for which the exergy is used that this tariff is more feasible for both DH suppliers and consumers compared with enthalpy.

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References

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