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

doi:10.18462/iir.gl.2018.1397

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

School of Fundamental Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	13th IIR Gustav Lorentzen Conference on Natural Refrigerants
Subtitle of host publication	Natural Refrigerant Solutions for Warm Climate Countries, Proceedings
Publisher	International Institute of Refrigeration
Pages	1345-1352
Number of pages	8
ISBN (Electronic)	9782362150265
DOIs	https://doi.org/10.18462/iir.gl.2018.1397
Publication status	Published - 2018
Event	13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries - Valencia, Spain Duration: 2018 Jun 18 → 2018 Jun 20

Publication series

Name	Refrigeration Science and Technology
Volume	2018-June
ISSN (Print)	0151-1637

Other

Other	13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries
Country/Territory	Spain
City	Valencia
Period	18/6/18 → 18/6/20

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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

Access to Document

10.18462/iir.gl.2018.1397

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 (pp. 1345-1352). (Refrigeration Science and Technology; Vol. 2018-June). International Institute of Refrigeration. https://doi.org/10.18462/iir.gl.2018.1397

Development of high performance air-conditioning system combined liquid desiccant and R718 centrifugal heat pump. / Yabase, Hajime; Yamaguchi, Seiichi ; Saito, Kiyoshi et al.
13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries, Proceedings. International Institute of Refrigeration, 2018. p. 1345-1352 (Refrigeration Science and Technology; Vol. 2018-June).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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. Refrigeration Science and Technology, vol. 2018-June, International Institute of Refrigeration, pp. 1345-1352, 13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries, Valencia, Spain, 18/6/18. https://doi.org/10.18462/iir.gl.2018.1397

Yabase H, Yamaguchi S , Saito K, Hasuike H, Sakamoto H, Matsumoto S et al. 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. International Institute of Refrigeration. 2018. p. 1345-1352. (Refrigeration Science and Technology). doi: 10.18462/iir.gl.2018.1397

Yabase, Hajime ; Yamaguchi, Seiichi ; Saito, Kiyoshi et al. / Development of high performance air-conditioning system combined liquid desiccant and R718 centrifugal heat pump. 13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries, Proceedings. International Institute of Refrigeration, 2018. pp. 1345-1352 (Refrigeration Science and Technology).

@inproceedings{147d60fd5e30426fa37adc9d91a90363,

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

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.",

keywords = "Air-conditioning system, Centrifugal heat pump, High efficiency, Liquid desiccant, R718",

author = "Hajime Yabase and Seiichi Yamaguchi and Kiyoshi Saito and Hiroshi Hasuike and Hayato Sakamoto and Satoru Matsumoto and Masatoshi Harada",

note = "Funding Information: This research work was conducted by “FY2016 Low Carbon Technology Research and Development Program: Development of High Performance Air-conditioning System Combining Liquid Desiccant and R718 Centrifugal Heat Pump” commissioned by Ministry of the Environment Japan. Publisher Copyright: {\textcopyright} 2018 International Institute of Refrigeration. All rights reserved.; 13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries ; Conference date: 18-06-2018 Through 20-06-2018",

year = "2018",

doi = "10.18462/iir.gl.2018.1397",

language = "English",

series = "Refrigeration Science and Technology",

publisher = "International Institute of Refrigeration",

pages = "1345--1352",

booktitle = "13th IIR Gustav Lorentzen Conference on Natural Refrigerants",

}

TY - GEN

T1 - Development of high performance air-conditioning system combined liquid desiccant and R718 centrifugal heat pump

AU - Yabase, Hajime

AU - Yamaguchi, Seiichi

AU - Saito, Kiyoshi

AU - Hasuike, Hiroshi

AU - Sakamoto, Hayato

AU - Matsumoto, Satoru

AU - Harada, Masatoshi

N1 - Funding Information: This research work was conducted by “FY2016 Low Carbon Technology Research and Development Program: Development of High Performance Air-conditioning System Combining Liquid Desiccant and R718 Centrifugal Heat Pump” commissioned by Ministry of the Environment Japan. Publisher Copyright: © 2018 International Institute of Refrigeration. All rights reserved.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - Air-conditioning system

KW - Centrifugal heat pump

KW - High efficiency

KW - Liquid desiccant

KW - R718

UR - https://www.scopus.com/pages/publications/85049865835

UR - https://www.scopus.com/pages/publications/85049865835#tab=citedBy

U2 - 10.18462/iir.gl.2018.1397

DO - 10.18462/iir.gl.2018.1397

M3 - Conference contribution

AN - SCOPUS:85049865835

T3 - Refrigeration Science and Technology

SP - 1345

EP - 1352

BT - 13th IIR Gustav Lorentzen Conference on Natural Refrigerants

PB - International Institute of Refrigeration

T2 - 13th IIR Gustav Lorentzen Conference on Natural Refrigerants: Natural Refrigerant Solutions for Warm Climate Countries

Y2 - 18 June 2018 through 20 June 2018

ER -

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

Abstract

Publication series

Other

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this