tailieunhanh - Evaporative Air-Conditioning phần 2

Mặc dù thiết bị làm mát bay hơi có thể được sử dụng trong tất cả các nước và tại mọi thời điểm, họ thường sử dụng đúng mức rất nhiều ở những nơi mà họ có thể được sử dụng thành công. Điều này là không may, cho cả người sử dụng tiềm năng, đất nước, và môi trường toàn cầu. | Foreword Although evaporative coolers cannot be used in all countries and at all times they are generally very much underutilized in places where they can be used successfully. This is unfortunate both for the potential user the country and the global environment. Benefits include lower cooling equipment costs and a much reduced electricity bill for the user reduced electrical energy and power demand at peaktimes for the country and lower greenhouse gas and CFC HFC emissions for us all. This handbook is designed for those who do not know evaporative coolers but might be convinced to try using or promoting them. It provides the advantages and disadvantages of using evaporative coolers while comparing them to the commonly used energy guzzling and expensive vapor compression air conditioners. Existing markets where evaporative coolers are currently used local manufacturing possibilities operational aspects are discussed along economic and global aspects. A world-wide list of manufacturers and suppliers is included in the Annex. James Bond Dữector Energy Mining and Telecommunications Department ix Abstract As the harmful envữonmental effects of chloro-fluorocarbons CFCs and greenhouse gases have become better known interest has grown in envữonmentally friendly cooling technologies. Evaporative air-conditioning EAC is such a technology. Whereas conventional vapor compression air-conditioning VAC uses CFCs as cooling liquids EAC uses water. EAC technology is simple functional and has both residential and commercial applications in industrialized and developing countries. EAC can provide superior cooling and ventilation while consuming less energy and hence contributing less to greenhouse gas emissions than VAC. EAC works best in hot dry climates but it can be used in more humid climates as well. This paper elucidates some of the technical characteristics and fields of application for EAC and outlines the climatic conditions under which EAC can be most effectively .