Development of high performance air-conditioning system combined liquid desiccant and R718 centrifugal heat pump

Hajime Yabase, Seiichi Yamaguchi, Kiyoshi Saito, Hiroshi Hasuike, Hayato Sakamoto, Satoru Matsumoto, Masatoshi Harada

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

    Abstract

    General implementation of air conditioning in buildings and facilities is such that in order to keep room temperature and humidity within predetermined range, heat pump is used to lower the air temperature to achieve desired humidity and then the air is heated to the specified temperature. From energy-saving perspective, this process is inefficient. To overcome such inefficiency, separation of latent heat and sensible heat has been proposed. This is a two-step process in which temperature and humidity are adjusted separately in two steps by combining desiccant dehumidifier and heat pump. Theoretically, the system is known to be effective in reducing energy consumption, but in practical application, this technology can be further improved. For this research, we have chosen liquid desiccant dehumidifier as the desiccant can be regenerated at low temperature. For heat pump system, we have chosen R718 centrifugal as it is suited for increasing efficiency for such combination of desiccant and heat pump. By improving each element of the system and seeking optimization of operating conditions, we aim to develop a high efficiency air-conditioning system. The result is reported here.

    Original languageEnglish
    Title of host publication13th IIR Gustav Lorentzen Conference on Natural Refrigerants
    Subtitle of host publicationNatural Refrigerant Solutions for Warm Climate Countries, Proceedings
    PublisherInternational Institute of Refrigeration
    Pages1345-1352
    Number of pages8
    Volume2018-June
    ISBN (Electronic)9782362150265
    DOIs
    Publication statusPublished - 2018 Jan 1
    Event13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries - Valencia, Spain
    Duration: 2018 Jun 182018 Jun 20

    Other

    Other13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries
    CountrySpain
    CityValencia
    Period18/6/1818/6/20

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    Keywords

    • Air-conditioning system
    • Centrifugal heat pump
    • High efficiency
    • Liquid desiccant
    • R718

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Electrical and Electronic Engineering
    • Mechanical Engineering
    • Condensed Matter Physics

    Cite this

    Yabase, H., Yamaguchi, S., Saito, K., Hasuike, H., Sakamoto, H., Matsumoto, S., & Harada, M. (2018). Development of high performance air-conditioning system combined liquid desiccant and R718 centrifugal heat pump. In 13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries, Proceedings (Vol. 2018-June, pp. 1345-1352). International Institute of Refrigeration. https://doi.org/10.18462/iir.gl.2018.1397