[논문]시뮬레이션을 통한 지열 히트펌프 시스템과 VRF 시스템의 에너지 성능비교

손병후; 임효재; 강성재

doi:10.17664/ksgee.2021.17.3.030

시뮬레이션을 통한 지열 히트펌프 시스템과 VRF 시스템의 에너지 성능비교
Comparison of Energy Performance between Ground-Source Heat Pump System and Variable Refrigerant Flow(VRF) Systems using Simulation 원문보기

한국지열·수열에너지학회논문집 = Journal of the Korean Society for Geothermal and Hydrothermal Energy, v.17 no.3, 2021년, pp.30 - 40

손병후 (한국건설기술연구원 건축에너지연구소) , 임효재 (호서대학교 지열인력양성센터) , 강성재 (호서대학교 지열인력양성센터)

Abstract ▼ AI-Helper

This paper compares the annual energy performance of four different types of air-conditioning systems in a medium-sized office building. Chiller and boiler, air-cooled VRF, ground-source VRF, and ground-source heat pump systems were selected as the systems to be compared. Specifically, the energy performance of the GSHP system and the ground-source VRF system were compared with each other and also with conventional HVAC systems including the chiller and boiler system and air-cooled VRF system. In order to evaluate and compare the energy performances of four systems for the office building, EnergyPlus, a whole-building energy simulation program, was used. The EnergyPlus simulation results show that both the GSHP and the ground-source VRF systems not only save more energy than the other two systems but also significantly reduce the electric peak demand. These make the GSHP and the VRF systems more desirable energy-efficient HVAC technologies for the utility companies and their clients. It is necessary to analyze the impact of partial load performance of ground-source heat pump and ground-source VRF on the long-term (more than 20 years) performance of ground heat exchangers and entire systems.

주제어

표/그림 (15)

그림 Fig. 1. Actual exterior of the building and 3D modeling
표 Table 1. Input parameters for building modeling.
그림 Fig. 2. Schedules for building energy loads modeling: (a) occupancy, (b) lighting, and (c) equipment
표 Table 2. Cooling and heating capacities, power requirements, and efficiencies of HVAC equipments
그림 Fig. 3. Schematic diagram for simulated systems
그림 Fig. 4. VRF cooling and heating correction factors based on tempearature
그림 Fig. 5. Cooling and heating performance of ground source heat pump unit
표 Table 3. Thermo-physical specifications of ground heat exchanger(GHE)
그림 Fig. 6. Hourly cooling and heating energy loads for C&B and air-cooled VRF
그림 Fig. 7. Hourly cooling and heating energy loads for Ground-source VRF and Ground-source heat pump
그림 Fig. 8. Hourly cooling and heating energy demands for C&B and air-cooled VRF
그림 Fig. 9. Hourly cooling and heating energy demands for Ground-source VRF and Ground-source heat pump
그림 Fig. 10. Annual cooling and heating energy demands for simulated systems and building total energy demands
표 Table 4. Annual power consumptions for simulated HVAC systems
표 Table 5. Total site energy consumptions and energy intensity of simulated building

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