Solid Desiccant Cooling System
International Conference on Mechanical, Industrial and Energy Engineering 2010
23-24 December, 2010, Khulna, BANGLADESH
MIE10-085
Construction and Performance Test of Solid Desiccant Cooling System
Md. Hasan Ali1, A. N. M. Mizanur Rahman2,,*, N. U. I. Hossain2, K. S. Islam2 1 Department of Energy Technology, 2 Department of Mechanical Engineering Khulna University of Engineering & Technology, Khulna-9203, Bangladesh ABSTRACT Apart from the conventional cooling, there are other methods that are employed for specific applications. Evaporative cooling comes under this category. This type of cooling has a great potential to provide thermal comfort in places where humidity is low. A way to solve this problem of high humidity is to use dehumidifiers for preconditioning the process air. Desiccant evaporative cooling (DEC) system has been proposed as energy saving alternatives to conventional cooling systems. In desiccant cooling, the air is first dehumidified before its temperature is reduced by evaporative cooling. Desiccant materials remove moisture from humid air, when air is passes through the desiccant. Use of solid desiccants offer several designs and performance advantages over liquid desiccants, when solar energy is used for regeneration. This paper presents the outcome of a solid desiccant evaporative cooling system (DEC) that can be used in moderate humid climates by coupling desiccant dehumidification equipment to evaporative coolers. Silica gel is used as desiccant in the present system. The rates of cooling and dehumidification were assessed under the effects of variables such as air temperature and humidity. The constructed solid desiccant cooling system could reduce the outlet air temperature up to a maximum of 9°C and the relative humidity of the room also decreases gradually. Keywords: Evaporative cooling, solid desiccant, desiccant cooling, relative humidity improvement was made in this system by using desiccant solution [1]. The more important
23-24 December, 2010, Khulna, BANGLADESH
MIE10-085
Construction and Performance Test of Solid Desiccant Cooling System
Md. Hasan Ali1, A. N. M. Mizanur Rahman2,,*, N. U. I. Hossain2, K. S. Islam2 1 Department of Energy Technology, 2 Department of Mechanical Engineering Khulna University of Engineering & Technology, Khulna-9203, Bangladesh ABSTRACT Apart from the conventional cooling, there are other methods that are employed for specific applications. Evaporative cooling comes under this category. This type of cooling has a great potential to provide thermal comfort in places where humidity is low. A way to solve this problem of high humidity is to use dehumidifiers for preconditioning the process air. Desiccant evaporative cooling (DEC) system has been proposed as energy saving alternatives to conventional cooling systems. In desiccant cooling, the air is first dehumidified before its temperature is reduced by evaporative cooling. Desiccant materials remove moisture from humid air, when air is passes through the desiccant. Use of solid desiccants offer several designs and performance advantages over liquid desiccants, when solar energy is used for regeneration. This paper presents the outcome of a solid desiccant evaporative cooling system (DEC) that can be used in moderate humid climates by coupling desiccant dehumidification equipment to evaporative coolers. Silica gel is used as desiccant in the present system. The rates of cooling and dehumidification were assessed under the effects of variables such as air temperature and humidity. The constructed solid desiccant cooling system could reduce the outlet air temperature up to a maximum of 9°C and the relative humidity of the room also decreases gradually. Keywords: Evaporative cooling, solid desiccant, desiccant cooling, relative humidity improvement was made in this system by using desiccant solution [1]. The more important
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