Experimental analysis of the effect of moisture on air cleaning performance of desiccant wheel in a Clean Air Heat Pump

Ying Sheng, Lei Fang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Clean air heat pump (CARP) is a new technology that combines air cleaning with hygro-thermal control of ventilation air, which is regarded as a potential integrated technology to improve indoor air quality. In CARP, a regenerative silica gel rotor is used for both moisture control and air cleaning. This study experimentally investigated the effect of moisture on the air cleaning performance of a desiccant wheel with the objective to guide practical operation of CAHP. The experiment was conducted in a laboratory by testing air cleaning performance of a CARP using five typical indoor pollutants - formaldehyde, acetone, ethanol, toluene and 1,2-dichloroethane as air pollutants. It was found that although the VOC concentration was low and only used a very small fraction of the wheel's adsorption capacity, the moisture load still had an adverse impact on the VOCs removal and the extent of impact was increased with the increasing of moisture load. This negative effect of moisture on the removal of non-water-soluble pollutants was more serious than on water-soluble pollutants. Faced with the results, it is suggested to achieve VOCs and moisture removal by means of controlling regeneration air temperature of desiccant wheel assisted with automation program for the CAHP system.
Original languageEnglish
JournalBuilding and Environment
Volume147
Pages (from-to)551-558
ISSN0360-1323
DOIs
Publication statusPublished - 2019

Keywords

  • Ventilation
  • Air cleaning
  • VOCs
  • Moisture
  • Energy saving

Cite this

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title = "Experimental analysis of the effect of moisture on air cleaning performance of desiccant wheel in a Clean Air Heat Pump",
abstract = "Clean air heat pump (CARP) is a new technology that combines air cleaning with hygro-thermal control of ventilation air, which is regarded as a potential integrated technology to improve indoor air quality. In CARP, a regenerative silica gel rotor is used for both moisture control and air cleaning. This study experimentally investigated the effect of moisture on the air cleaning performance of a desiccant wheel with the objective to guide practical operation of CAHP. The experiment was conducted in a laboratory by testing air cleaning performance of a CARP using five typical indoor pollutants - formaldehyde, acetone, ethanol, toluene and 1,2-dichloroethane as air pollutants. It was found that although the VOC concentration was low and only used a very small fraction of the wheel's adsorption capacity, the moisture load still had an adverse impact on the VOCs removal and the extent of impact was increased with the increasing of moisture load. This negative effect of moisture on the removal of non-water-soluble pollutants was more serious than on water-soluble pollutants. Faced with the results, it is suggested to achieve VOCs and moisture removal by means of controlling regeneration air temperature of desiccant wheel assisted with automation program for the CAHP system.",
keywords = "Ventilation, Air cleaning, VOCs, Moisture, Energy saving",
author = "Ying Sheng and Lei Fang",
year = "2019",
doi = "10.1016/j.buildenv.2018.10.052",
language = "English",
volume = "147",
pages = "551--558",
journal = "Building and Environment",
issn = "0360-1323",
publisher = "Pergamon Press",

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Experimental analysis of the effect of moisture on air cleaning performance of desiccant wheel in a Clean Air Heat Pump. / Sheng, Ying; Fang, Lei.

In: Building and Environment, Vol. 147, 2019, p. 551-558.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Experimental analysis of the effect of moisture on air cleaning performance of desiccant wheel in a Clean Air Heat Pump

AU - Sheng, Ying

AU - Fang, Lei

PY - 2019

Y1 - 2019

N2 - Clean air heat pump (CARP) is a new technology that combines air cleaning with hygro-thermal control of ventilation air, which is regarded as a potential integrated technology to improve indoor air quality. In CARP, a regenerative silica gel rotor is used for both moisture control and air cleaning. This study experimentally investigated the effect of moisture on the air cleaning performance of a desiccant wheel with the objective to guide practical operation of CAHP. The experiment was conducted in a laboratory by testing air cleaning performance of a CARP using five typical indoor pollutants - formaldehyde, acetone, ethanol, toluene and 1,2-dichloroethane as air pollutants. It was found that although the VOC concentration was low and only used a very small fraction of the wheel's adsorption capacity, the moisture load still had an adverse impact on the VOCs removal and the extent of impact was increased with the increasing of moisture load. This negative effect of moisture on the removal of non-water-soluble pollutants was more serious than on water-soluble pollutants. Faced with the results, it is suggested to achieve VOCs and moisture removal by means of controlling regeneration air temperature of desiccant wheel assisted with automation program for the CAHP system.

AB - Clean air heat pump (CARP) is a new technology that combines air cleaning with hygro-thermal control of ventilation air, which is regarded as a potential integrated technology to improve indoor air quality. In CARP, a regenerative silica gel rotor is used for both moisture control and air cleaning. This study experimentally investigated the effect of moisture on the air cleaning performance of a desiccant wheel with the objective to guide practical operation of CAHP. The experiment was conducted in a laboratory by testing air cleaning performance of a CARP using five typical indoor pollutants - formaldehyde, acetone, ethanol, toluene and 1,2-dichloroethane as air pollutants. It was found that although the VOC concentration was low and only used a very small fraction of the wheel's adsorption capacity, the moisture load still had an adverse impact on the VOCs removal and the extent of impact was increased with the increasing of moisture load. This negative effect of moisture on the removal of non-water-soluble pollutants was more serious than on water-soluble pollutants. Faced with the results, it is suggested to achieve VOCs and moisture removal by means of controlling regeneration air temperature of desiccant wheel assisted with automation program for the CAHP system.

KW - Ventilation

KW - Air cleaning

KW - VOCs

KW - Moisture

KW - Energy saving

U2 - 10.1016/j.buildenv.2018.10.052

DO - 10.1016/j.buildenv.2018.10.052

M3 - Journal article

VL - 147

SP - 551

EP - 558

JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

ER -