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Effects of Pipe Network Materials and Distance on Unused Energy Source System Performance for Large-scale Horticulture Facilities

배관 재질 및 길이에 따른 대규모 시설원예단지용 미활용 에너지 시스템의 성능 평가

  • Received : 2014.07.15
  • Accepted : 2014.08.18
  • Published : 2014.08.31

Abstract

This study investigated the effects of pipe network materials and distance on system performance utilizing unused energy sources in large-scale horticulture facility. For this, the modeling was performed with a 100 m long and 100 m wide rectangular shaped glass house having an area of 1ha ($10,000m^2$) using EnergyPlus software. The heat sources considered were air source, geothermal heat, power plant waste heat, sea water heat, and river water. The temperature variation of the fluid with regard to pipe material and distance from the heat source and the resultant heat pump electricity consumptions were calculated. It turned out that the fluid temperature reaching the heat pump increased as the distance from the heat source increased in case of sea water and river water, which have higher temperatures than the surrounding soil, improving the heat pump efficiency. It was vice versa in case of the power plant waste heat. In addition, pipe material of PVC showed the smallest effect on the system performance variation due to the lowest thermal conductivity, compared to PB and HDPE.

Keywords

Unused energy sources;Piping parameters;Pipe network;Large-scale horticulture facility;EnergyPlus

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Cited by

  1. Operational Energy Saving Potential of Thermal Effluent Source Heat Pump System for Greenhouse Heating in Jeju 2017, https://doi.org/10.1142/S2010132517500304

Acknowledgement

Grant : Development of Optimal District Energy and Operation System using Industrial Waste Heat for Large-scale Horticulture Facility Applications

Supported by : Rural Development Administration