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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Performance Improvement of a Simultaneous Heating and Cooling Water Source Heat Pump System by Controlling of the Refrigerant Flow Rate in an Outdoor Unit

수열원 냉난방 동시형 히트펌프 시스템의 실외 열교환기 유량제어를 통한 성능개선에 관한 연구

  • Received : 2012.11.01
  • Published : 2013.03.10
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Abstract

The present study has conducted cycle design and control technology of a water source VRF heat pump system. Previously, study of a simultaneous heating and cooling in an air source VRF heat pump system has been conducted. However, performance data and design methods for simultaneous heating and cooling in a water source VRF heat pump system are limited in the literature, due to various system parameters and operating conditions. In this study, the operating characteristics and performances of a simultaneous heating and cooling heat pump system are carried out, in simultaneous operation modes. Control logics of an EEV are developed for flow rate control to the outdoor unit, and are verified. When the control logics are applied, the simultaneous cooling and heating performances are sufficiently achieved, and system COPs are increased by up to 23.4%.

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References

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  1. Utilising Unused Energy Resources for Sustainable Heating and Cooling System in Buildings: A Case Study of Geothermal Energy and Water Sources in a University vol.11, pp.7, 2018, https://doi.org/10.3390/en11071836