Operational status evaluation of integrated hybrid VRF system

Atsushi Hashimoto, Masanari Ukai, Yuma Furuhashi, Ken Yasuda, Tatsuo Nobe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Variable refrigerant flow (VRF) systems are used as air conditioning systems in small and medium-sized buildings in Japan. Conventionally, the two most popular types of VRF systems are the Electrical Motor-Driven VRF system (EHP) and the Gas Engine Driven VRF system (GHP). However, in recent years, society has been increasingly demanding energy saving and the best energy mix. This required an air conditioning system that is capable of flexibly using energy according to the application and situation. Consequently, a hybrid air conditioning system (called the Integrated Hybrid VRF system) that satisfies this need was developed. The developed system enables operation in accordance with energy prices and usage situations by connecting a GHP and an EHP in a single refrigerant cycle. Subsequently, in recent years, the Integrated Hybrid VRF system has been utilized in small and medium-sized buildings. However, the actual performance characteristics of this system have not yet been investigated. In this study, measurements were obtained during the actual operation of an Integrated Hybrid VRF system operating in an office building and controlled by a remote monitoring server to enable optimal operation according to the application and situation. In this report, the actual operational status of the Integrated Hybrid VRF system with optimal operational control is presented.

Original languageEnglish
Title of host publicationECOS 2018 - Proceedings of the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
PublisherUniversity of Minho
ISBN (Electronic)9789729959646
Publication statusPublished - 2018
Externally publishedYes
Event31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2018 - Guimaraes, Portugal
Duration: 2018 Jun 172018 Jun 21

Publication series

NameECOS 2018 - Proceedings of the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems

Conference

Conference31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2018
CountryPortugal
CityGuimaraes
Period18/6/1718/6/21

Keywords

  • Optimal operational control
  • Probe insertion method
  • Variable refrigerant flow system

ASJC Scopus subject areas

  • Environmental Science(all)
  • Energy(all)

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