A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaporative cooling: water for thermal comfort ; Evaporative cooling: water for thermal comfort (doi:10.4136/ambi-agua.52) ; Resfriamento evaporativo: gua para conforto trmico (doi:10.4136/ambi-agua.52) (Ingls)
Evaporative cooling is an environmentally friendly air conditioning system that operates using induced processes of heat and mass transfer, where water and air are the working fluids. It consists, specifically, in water evaporation, induced by the passage of an air flow, thus decreasing the air temperature. This paper presents three methods that can be used as reference for efficient use of evaporative cooling systems, applying it to several Brazilian cities, characterized by different climates. Initially it presents the basic operation principles of direct and indirect evaporative cooling and defines the effectiveness of the systems. Afterwards, it presents three methods that allows to determinate where the systems are more efficient. It concludes that evaporative cooling systems have a very large potential to propitiate thermal comfort and can still be used as an alternative to conventional systems in regions where the design wet bulb temperature is under 24C. ; Evaporative cooling is an environmentally friendly air conditioning system that operates using induced processes of heat and mass transfer, where water and air are the working fluids. It consists, specifically, in water evaporation, induced by the passage of an air flow, thus decreasing the air temperature. This paper presents three methods that can be used as reference for efficient use of evaporative cooling systems, applying it to several Brazilian cities, characterized by different climates. Initially it presents the basic operation principles of direct and indirect evaporative cooling and defines the effectiveness of the systems. Afterwards, it presents three methods that allows to determinate where the systems are more efficient. It concludes that evaporative cooling systems have a very large potential to propitiate thermal comfort and can still be used as an alternative to conventional systems in regions where the design wet bulb temperature is under 24C. ; Resfriamento evaporativo um sistema de condicionamento de ar ambientalmente amigvel, que opera por meio de processos induzidos de transferncia de calor e massa, nos quais a gua e o ar so os fluidos de trabalho. Consiste na evaporao de gua, induzida pela passagem de uma corrente de ar, o que provoca uma reduo na temperatura do ar. Este trabalho apresenta trs mtodos que podem ser utilizados como referncia para a aplicao eficiente de sistemas de resfriamento evaporativo, aplicando-os a algumas cidades brasileiras, caracterizadas por condies climticas diversas. Apresenta-se, inicialmente o princpio de operao dos sistemas de resfriamento evaporativo direto e indireto e define-se a efetividade dos sistemas. Aps, so apresentados os trs mtodos, concluindo-se que os sistemas de resfriamento evaporativo tem grande potencial para oferecer conforto trmico, podendo ser utilizado como uma alternativa aos sistemas de condicionamento de ar convencionais em regies onde a temperatura de bulbo mido de projeto menor que 24C.
Evaporative cooling: water for thermal comfort ; Evaporative cooling: water for thermal comfort (doi:10.4136/ambi-agua.52) ; Resfriamento evaporativo: gua para conforto trmico (doi:10.4136/ambi-agua.52) (Ingls)
Evaporative cooling is an environmentally friendly air conditioning system that operates using induced processes of heat and mass transfer, where water and air are the working fluids. It consists, specifically, in water evaporation, induced by the passage of an air flow, thus decreasing the air temperature. This paper presents three methods that can be used as reference for efficient use of evaporative cooling systems, applying it to several Brazilian cities, characterized by different climates. Initially it presents the basic operation principles of direct and indirect evaporative cooling and defines the effectiveness of the systems. Afterwards, it presents three methods that allows to determinate where the systems are more efficient. It concludes that evaporative cooling systems have a very large potential to propitiate thermal comfort and can still be used as an alternative to conventional systems in regions where the design wet bulb temperature is under 24C. ; Evaporative cooling is an environmentally friendly air conditioning system that operates using induced processes of heat and mass transfer, where water and air are the working fluids. It consists, specifically, in water evaporation, induced by the passage of an air flow, thus decreasing the air temperature. This paper presents three methods that can be used as reference for efficient use of evaporative cooling systems, applying it to several Brazilian cities, characterized by different climates. Initially it presents the basic operation principles of direct and indirect evaporative cooling and defines the effectiveness of the systems. Afterwards, it presents three methods that allows to determinate where the systems are more efficient. It concludes that evaporative cooling systems have a very large potential to propitiate thermal comfort and can still be used as an alternative to conventional systems in regions where the design wet bulb temperature is under 24C. ; Resfriamento evaporativo um sistema de condicionamento de ar ambientalmente amigvel, que opera por meio de processos induzidos de transferncia de calor e massa, nos quais a gua e o ar so os fluidos de trabalho. Consiste na evaporao de gua, induzida pela passagem de uma corrente de ar, o que provoca uma reduo na temperatura do ar. Este trabalho apresenta trs mtodos que podem ser utilizados como referncia para a aplicao eficiente de sistemas de resfriamento evaporativo, aplicando-os a algumas cidades brasileiras, caracterizadas por condies climticas diversas. Apresenta-se, inicialmente o princpio de operao dos sistemas de resfriamento evaporativo direto e indireto e define-se a efetividade dos sistemas. Aps, so apresentados os trs mtodos, concluindo-se que os sistemas de resfriamento evaporativo tem grande potencial para oferecer conforto trmico, podendo ser utilizado como uma alternativa aos sistemas de condicionamento de ar convencionais em regies onde a temperatura de bulbo mido de projeto menor que 24C.
Evaporative cooling: water for thermal comfort ; Evaporative cooling: water for thermal comfort (doi:10.4136/ambi-agua.52) ; Resfriamento evaporativo: gua para conforto trmico (doi:10.4136/ambi-agua.52) (Ingls)
Camargo, Jos�� Rui (author)
2008-08-26
Ambiente & ��gua - An Interdisciplinary Journal of Applied Science; v. 3 n. 2 (2008); 51-61 ; Ambiente e Agua - An Interdisciplinary Journal of Applied Science; Vol. 3 No. 2 (2008); 51-61 ; Ambiente e Agua - An Interdisciplinary Journal of Applied Science; Vol. 3 N��m. 2 (2008); 51-61 ; 1980-993X
Article (Journal)
Electronic Resource
Portuguese , English , Spanish
DDC:
690
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