Aimed at building a healthy living environment: An analysis of performance of Clean-Air Heat Pump system for ammonia removal

Ying Sheng; Lei Fang; Le Zhang; Yanqiang Wang

doi:10.1016/j.buildenv.2019.106639

Aimed at building a healthy living environment: An analysis of performance of Clean-Air Heat Pump system for ammonia removal

Ying Sheng^*, Lei Fang, Le Zhang, Yanqiang Wang

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Clean-Air Heat Pump (CAHP) is an innovative system which combines a desiccant wheel with a heat pump which can improve indoor air quality during the process of hygro-thermal control without using additional energy. It is verified that organic gaseous pollutants in air can be effectively removed by the CAHP in our previous research papers but whether the air purification capability of the CAHP is equally effective for inorganic pollutants is unknown. Therefore, in this paper, the removal of ammonia (NH₃)-one typical inorganic pollutant by the CAHP was focused, and the effects of regeneration air temperature of the rotor and NH₃ concentration on NH₃ removal were elaborated analyzed. The results showed that NH₃ could not be continuously removed when the adsorbent-silica gel in the CAHP was regenerated by low-temperature thermal energy like 60 °C. A higher regeneration air temperature, possibly more than 90 °C, was required, in which case NH₃ removal and desorption efficiencies reached 86.5% and 93.8% when the NH₃ concentration was 2.5 ppm. Even if the NH₃ concentration in process air was increased to 7.1 ppm, the air cleaning efficiency was still maintained above 67%.

Original language	English
Article number	106639
Journal	Building and Environment
Volume	171
Number of pages	7
ISSN	0360-1323
DOIs	https://doi.org/10.1016/j.buildenv.2019.106639
Publication status	Published - 2020

Keywords

Ammonia
Air purification
Ventilation
Energy saving
Indoor air quality

Access to Document

10.1016/j.buildenv.2019.106639

Fingerprint Dive into the research topics of 'Aimed at building a healthy living environment: An analysis of performance of Clean-Air Heat Pump system for ammonia removal'. Together they form a unique fingerprint.

Cite this

@article{0877f9b92be5420394b9dd8040efe3c3,

title = "Aimed at building a healthy living environment: An analysis of performance of Clean-Air Heat Pump system for ammonia removal",

abstract = "Clean-Air Heat Pump (CAHP) is an innovative system which combines a desiccant wheel with a heat pump which can improve indoor air quality during the process of hygro-thermal control without using additional energy. It is verified that organic gaseous pollutants in air can be effectively removed by the CAHP in our previous research papers but whether the air purification capability of the CAHP is equally effective for inorganic pollutants is unknown. Therefore, in this paper, the removal of ammonia (NH3)-one typical inorganic pollutant by the CAHP was focused, and the effects of regeneration air temperature of the rotor and NH3 concentration on NH3 removal were elaborated analyzed. The results showed that NH3 could not be continuously removed when the adsorbent-silica gel in the CAHP was regenerated by low-temperature thermal energy like 60 °C. A higher regeneration air temperature, possibly more than 90 °C, was required, in which case NH3 removal and desorption efficiencies reached 86.5% and 93.8% when the NH3 concentration was 2.5 ppm. Even if the NH3 concentration in process air was increased to 7.1 ppm, the air cleaning efficiency was still maintained above 67%.",

keywords = "Ammonia, Air purification, Ventilation, Energy saving, Indoor air quality",

author = "Ying Sheng and Lei Fang and Le Zhang and Yanqiang Wang",

year = "2020",

doi = "10.1016/j.buildenv.2019.106639",

language = "English",

volume = "171",

journal = "Building and Environment",

issn = "0360-1323",

publisher = "Pergamon Press",

}

TY - JOUR

T1 - Aimed at building a healthy living environment: An analysis of performance of Clean-Air Heat Pump system for ammonia removal

AU - Sheng, Ying

AU - Fang, Lei

AU - Zhang, Le

AU - Wang, Yanqiang

PY - 2020

Y1 - 2020

N2 - Clean-Air Heat Pump (CAHP) is an innovative system which combines a desiccant wheel with a heat pump which can improve indoor air quality during the process of hygro-thermal control without using additional energy. It is verified that organic gaseous pollutants in air can be effectively removed by the CAHP in our previous research papers but whether the air purification capability of the CAHP is equally effective for inorganic pollutants is unknown. Therefore, in this paper, the removal of ammonia (NH3)-one typical inorganic pollutant by the CAHP was focused, and the effects of regeneration air temperature of the rotor and NH3 concentration on NH3 removal were elaborated analyzed. The results showed that NH3 could not be continuously removed when the adsorbent-silica gel in the CAHP was regenerated by low-temperature thermal energy like 60 °C. A higher regeneration air temperature, possibly more than 90 °C, was required, in which case NH3 removal and desorption efficiencies reached 86.5% and 93.8% when the NH3 concentration was 2.5 ppm. Even if the NH3 concentration in process air was increased to 7.1 ppm, the air cleaning efficiency was still maintained above 67%.

AB - Clean-Air Heat Pump (CAHP) is an innovative system which combines a desiccant wheel with a heat pump which can improve indoor air quality during the process of hygro-thermal control without using additional energy. It is verified that organic gaseous pollutants in air can be effectively removed by the CAHP in our previous research papers but whether the air purification capability of the CAHP is equally effective for inorganic pollutants is unknown. Therefore, in this paper, the removal of ammonia (NH3)-one typical inorganic pollutant by the CAHP was focused, and the effects of regeneration air temperature of the rotor and NH3 concentration on NH3 removal were elaborated analyzed. The results showed that NH3 could not be continuously removed when the adsorbent-silica gel in the CAHP was regenerated by low-temperature thermal energy like 60 °C. A higher regeneration air temperature, possibly more than 90 °C, was required, in which case NH3 removal and desorption efficiencies reached 86.5% and 93.8% when the NH3 concentration was 2.5 ppm. Even if the NH3 concentration in process air was increased to 7.1 ppm, the air cleaning efficiency was still maintained above 67%.

KW - Ammonia

KW - Air purification

KW - Ventilation

KW - Energy saving

KW - Indoor air quality

U2 - 10.1016/j.buildenv.2019.106639

DO - 10.1016/j.buildenv.2019.106639

M3 - Journal article

VL - 171

JO - Building and Environment

JF - Building and Environment

SN - 0360-1323

M1 - 106639

ER -