You are in the accessibility menu

Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/68316
Title: 
An evaporative and desiccant cooling system for air conditioning in humid climates
Author(s): 
Institution: 
  • Universidade de Taubaté - UNITAU
  • Universidade Estadual Paulista (UNESP)
ISSN: 
1678-5878
Abstract: 
Evaporative cooling operates using water and air as working fluids. It consists in water evaporation, through the passage of an airflow, thus decreasing the air temperature. This system has a great potential to provide thermal comfort in places where air humidity is low, being, however, less efficient where air humidity is high. A way to solve this problem is to use dehumidifiers to pre-conditioning the process air. This paper presents a system that can be used in humid climates coupling desiccant dehumidification equipment to evaporative coolers. The paper shows, initially, the main characteristics of the evaporative cooling and of the adsorption dehumidification systems. Later on the coupled systems, in which occurs a dehumidification by adsorption in a counter flow rotary heat exchanger following the evaporate cooling of the air in evaporative coolers, are analyzed. The thermodynamic equations of state are also presented. Following, this paper analyzes some operation parameters such as: reactivation temperature, R/P relationship (reactivation air flow/ process air flow) and the thermodynamic conditions of the entering air flow. The paper shows the conditions for the best operation point, with regard to thermal comfort conditions and to the energy used in the process. In addition this paper presents an application of the system in different climate characteristics of several tropical and equatorial cities. Copyright © 2005 by ABCM.
Issue Date: 
1-Jul-2005
Citation: 
Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 27, n. 3, p. 243-247, 2005.
Time Duration: 
243-247
Keywords: 
  • Desiccant system
  • Evaporative cooling
  • Thermal comfort
  • Adsorbents
  • Adsorption
  • Air conditioning
  • Atmospheric humidity
  • Cooling
  • Mass transfer
  • Partial pressure
  • Steam turbines
  • Thermodynamics
  • Dehumidification
  • Desciccant cooling systems
  • Evaporative cooling systems
Source: 
http://dx.doi.org/10.1590/S1678-58782005000300005
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/68316
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

There are no files associated with this item.
 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.