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
ISBN (Electronic)9782362150265
DOIs
Publication statusPublished - 2018
Event13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries - Valencia, Spain
Duration: 2018 Jun 182018 Jun 20

Publication series

NameRefrigeration Science and Technology
Volume2018-June
ISSN (Print)0151-1637

Other

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

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

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