Effect of parameters on moisture removal capacity in the desiccant cooling systems

A mathematical model was developed to investigate the effect of crucial operating parameters, such as process inlet humidity ratio, inlet volume flow rate, R/P ratio (reactivation/process air flow), regenerative temperature and rotational speed on the performance of desiccant wheels in hot and humid...

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Main Authors: Ali Alahmer, Sameh Alsaqoor, Gabriel Borowski
Format: Article
Language:English
Published: Elsevier 2019-03-01
Series:Case Studies in Thermal Engineering
Online Access:http://www.sciencedirect.com/science/article/pii/S2214157X18303228
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spelling doaj-c00e13f6819046039ae29db480d840662020-11-25T01:06:37ZengElsevierCase Studies in Thermal Engineering2214-157X2019-03-0113Effect of parameters on moisture removal capacity in the desiccant cooling systemsAli Alahmer0Sameh Alsaqoor1Gabriel Borowski2Department of Mechanical Engineering, Tafila Technical University, P.O. Box 179, 66110 Tafila, JordanDepartment of Mechanical Engineering, Tafila Technical University, P.O. Box 179, 66110 Tafila, JordanEnvironmental Engineering Faculty, Lublin University of Technology, Nadbystrzycka Str. 40B, 20-618 Lublin, Poland; Corresponding author.A mathematical model was developed to investigate the effect of crucial operating parameters, such as process inlet humidity ratio, inlet volume flow rate, R/P ratio (reactivation/process air flow), regenerative temperature and rotational speed on the performance of desiccant wheels in hot and humid climates, using wound silica gel and molecular sieve desiccants. The desiccant wheels were designed to operate in two modes, specifically, with 90° for reactivation and 270° for process (1:3 split) as well as with 180° for reactivation and 180° for process (1:1 split). The main results enabled to make the following observations: (i) higher regeneration air temperature leads to an improvement of dehumidification and reduction of the thermal coefficient of performance COPth, (ii) an increase in the process inlet volume flow rate causes a reduction in the process removed moisture; (iii) the greater R/P ratio is required to remove more moisture, while a lower R/P ratio implies the lower power consumption for regeneration; (iv) silica gel desiccant is preferred when greater moisture removal is required at high inlet relative humidity, while molecular sieve desiccant is preferred when low dew point is required at low inlet relative humidity. Keywords: Moisture, Desiccant, Cooling system, Silica gel, Molecular sieve, Indoor humidityhttp://www.sciencedirect.com/science/article/pii/S2214157X18303228
collection DOAJ
language English
format Article
sources DOAJ
author Ali Alahmer
Sameh Alsaqoor
Gabriel Borowski
spellingShingle Ali Alahmer
Sameh Alsaqoor
Gabriel Borowski
Effect of parameters on moisture removal capacity in the desiccant cooling systems
Case Studies in Thermal Engineering
author_facet Ali Alahmer
Sameh Alsaqoor
Gabriel Borowski
author_sort Ali Alahmer
title Effect of parameters on moisture removal capacity in the desiccant cooling systems
title_short Effect of parameters on moisture removal capacity in the desiccant cooling systems
title_full Effect of parameters on moisture removal capacity in the desiccant cooling systems
title_fullStr Effect of parameters on moisture removal capacity in the desiccant cooling systems
title_full_unstemmed Effect of parameters on moisture removal capacity in the desiccant cooling systems
title_sort effect of parameters on moisture removal capacity in the desiccant cooling systems
publisher Elsevier
series Case Studies in Thermal Engineering
issn 2214-157X
publishDate 2019-03-01
description A mathematical model was developed to investigate the effect of crucial operating parameters, such as process inlet humidity ratio, inlet volume flow rate, R/P ratio (reactivation/process air flow), regenerative temperature and rotational speed on the performance of desiccant wheels in hot and humid climates, using wound silica gel and molecular sieve desiccants. The desiccant wheels were designed to operate in two modes, specifically, with 90° for reactivation and 270° for process (1:3 split) as well as with 180° for reactivation and 180° for process (1:1 split). The main results enabled to make the following observations: (i) higher regeneration air temperature leads to an improvement of dehumidification and reduction of the thermal coefficient of performance COPth, (ii) an increase in the process inlet volume flow rate causes a reduction in the process removed moisture; (iii) the greater R/P ratio is required to remove more moisture, while a lower R/P ratio implies the lower power consumption for regeneration; (iv) silica gel desiccant is preferred when greater moisture removal is required at high inlet relative humidity, while molecular sieve desiccant is preferred when low dew point is required at low inlet relative humidity. Keywords: Moisture, Desiccant, Cooling system, Silica gel, Molecular sieve, Indoor humidity
url http://www.sciencedirect.com/science/article/pii/S2214157X18303228
work_keys_str_mv AT alialahmer effectofparametersonmoistureremovalcapacityinthedesiccantcoolingsystems
AT samehalsaqoor effectofparametersonmoistureremovalcapacityinthedesiccantcoolingsystems
AT gabrielborowski effectofparametersonmoistureremovalcapacityinthedesiccantcoolingsystems
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