Adsorption vacuum dehumidification for low-carbon indoor environment

Kwong Fai Fong; C.K. Lee

doi:10.1016/B978-0-443-34164-9.00005-8

Adsorption vacuum dehumidification for low-carbon indoor environment

Kwong Fai Fong
, C.K. Lee

Department of Architecture and Civil Engineering

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 12 - Chapter in an edited book (Author)

Abstract

Air-conditioning systems used to be a major electricity consumer and carbon footprint in a modern city. To achieve energy and carbon emissions reduction, the shift to thermal cooling, which utilizes renewable or waste heat sources to drive the system, is one feasible direction. Consequently, a novel heat-driven adsorption vacuum dehumidifier (AdVD) was proposed that employed an adsorption refrigeration cycle to generate a vacuum section for dehumidifying a moist air stream through a selective membrane. Compared with an adsorption chiller (AdC), the AdVD achieved improvements of 69.3% in cooling capacity and 52.3% in coefficient of performance. The parametric studies on the AdVD revealed different performance trends that highlighted a different design optimization from the AdC. Meanwhile, the merit of using the AdVD over the AdC increased significantly under less favorable cooling and hot water temperatures, which made the AdVD a good choice in a sustainable air-conditioning system.
Copyright © 2026 Elsevier Ltd.

Original language	English
Title of host publication	Net Zero Transition in Buildings
Subtitle of host publication	Emerging Concepts and Technologies
Editors	Xiaojun Luo, Francisco Sierra
Place of Publication	United Kingdom
Publisher	Woodhead Publishing Limited
Chapter	4
Pages	73-91
ISBN (Electronic)	9780443341656
ISBN (Print)	9780443341649
DOIs	https://doi.org/10.1016/B978-0-443-34164-9.00005-8
Publication status	Published - 13 May 2026

Publication series

Name	Woodhead Publishing Series in Civil and Structural Engineering
Publisher	Woodhead Publishing

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10.1016/B978-0-443-34164-9.00005-8

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title = "Adsorption vacuum dehumidification for low-carbon indoor environment",

abstract = "Air-conditioning systems used to be a major electricity consumer and carbon footprint in a modern city. To achieve energy and carbon emissions reduction, the shift to thermal cooling, which utilizes renewable or waste heat sources to drive the system, is one feasible direction. Consequently, a novel heat-driven adsorption vacuum dehumidifier (AdVD) was proposed that employed an adsorption refrigeration cycle to generate a vacuum section for dehumidifying a moist air stream through a selective membrane. Compared with an adsorption chiller (AdC), the AdVD achieved improvements of 69.3\% in cooling capacity and 52.3\% in coefficient of performance. The parametric studies on the AdVD revealed different performance trends that highlighted a different design optimization from the AdC. Meanwhile, the merit of using the AdVD over the AdC increased significantly under less favorable cooling and hot water temperatures, which made the AdVD a good choice in a sustainable air-conditioning system. Copyright {\textcopyright} 2026 Elsevier Ltd.",

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Adsorption vacuum dehumidification for low-carbon indoor environment. / Fong, Kwong Fai; Lee, C.K.
Net Zero Transition in Buildings: Emerging Concepts and Technologies. ed. / Xiaojun Luo; Francisco Sierra. United Kingdom: Woodhead Publishing Limited, 2026. p. 73-91 (Woodhead Publishing Series in Civil and Structural Engineering).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 12 - Chapter in an edited book (Author)

TY - CHAP

T1 - Adsorption vacuum dehumidification for low-carbon indoor environment

AU - Fong, Kwong Fai

AU - Lee, C.K.

PY - 2026/5/13

Y1 - 2026/5/13

N2 - Air-conditioning systems used to be a major electricity consumer and carbon footprint in a modern city. To achieve energy and carbon emissions reduction, the shift to thermal cooling, which utilizes renewable or waste heat sources to drive the system, is one feasible direction. Consequently, a novel heat-driven adsorption vacuum dehumidifier (AdVD) was proposed that employed an adsorption refrigeration cycle to generate a vacuum section for dehumidifying a moist air stream through a selective membrane. Compared with an adsorption chiller (AdC), the AdVD achieved improvements of 69.3% in cooling capacity and 52.3% in coefficient of performance. The parametric studies on the AdVD revealed different performance trends that highlighted a different design optimization from the AdC. Meanwhile, the merit of using the AdVD over the AdC increased significantly under less favorable cooling and hot water temperatures, which made the AdVD a good choice in a sustainable air-conditioning system. Copyright © 2026 Elsevier Ltd.

AB - Air-conditioning systems used to be a major electricity consumer and carbon footprint in a modern city. To achieve energy and carbon emissions reduction, the shift to thermal cooling, which utilizes renewable or waste heat sources to drive the system, is one feasible direction. Consequently, a novel heat-driven adsorption vacuum dehumidifier (AdVD) was proposed that employed an adsorption refrigeration cycle to generate a vacuum section for dehumidifying a moist air stream through a selective membrane. Compared with an adsorption chiller (AdC), the AdVD achieved improvements of 69.3% in cooling capacity and 52.3% in coefficient of performance. The parametric studies on the AdVD revealed different performance trends that highlighted a different design optimization from the AdC. Meanwhile, the merit of using the AdVD over the AdC increased significantly under less favorable cooling and hot water temperatures, which made the AdVD a good choice in a sustainable air-conditioning system. Copyright © 2026 Elsevier Ltd.

U2 - 10.1016/B978-0-443-34164-9.00005-8

DO - 10.1016/B978-0-443-34164-9.00005-8

M3 - RGC 12 - Chapter in an edited book (Author)

SN - 9780443341649

T3 - Woodhead Publishing Series in Civil and Structural Engineering

SP - 73

EP - 91

BT - Net Zero Transition in Buildings

A2 - Luo, Xiaojun

A2 - Sierra, Francisco

PB - Woodhead Publishing Limited

CY - United Kingdom

ER -

Adsorption vacuum dehumidification for low-carbon indoor environment

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