{"id":4934,"date":"2022-04-28T09:16:08","date_gmt":"2022-04-28T13:16:08","guid":{"rendered":"https:\/\/armstronginternational.com\/china\/?page_id=4934"},"modified":"2022-10-13T14:48:39","modified_gmt":"2022-10-13T14:48:39","slug":"how-evapack-works","status":"publish","type":"page","link":"https:\/\/armstronginternational.com\/china\/industries\/data-centers\/how-evapack-works\/","title":{"rendered":"How EvaPack\u00ae<\/sup> Works"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":0,"parent":4805,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-4934","page","type-page","status-publish","hentry"],"acf":{"banner_type":"medium","video":"","banner_image":10000039586,"banner_heading":"How Armstrong International's EvaPack\u00ae<\/sup> Adiabatic Humidifier Series Works","banner_subhead":"","banner_paragraph":"","button_link":"","button_label":"","modules":[{"module":"full","content_type_1":"narrow","padding":"pad-bottom","background":"none","image_position":false,"image_1":null,"image_2":null,"video_file":null,"color":"","font_color":"","section_heading":"","module_content_1":"

The adiabatic process is simple, natural and extremely efficient.<\/h3>\r\nEvaPack\u00ae<\/sup> converts liquid water to water vapor using the adiabatic process. Dry air passes through a corrugated bank of wetted cells media made from non-organic wet fibers. EvaPack\u00ae<\/sup> uses the sensible air heat to evaporate the water, which cools and humidifies the air. The adiabatic process consumes no electricity, making Armstrong's EvaPack\u00ae<\/sup> the ideal choice for data centers trying to achieve a reduced energy footprint.\r\n

EvaPack\u00ae<\/sup> Brochure<\/a><\/p>","module_content_2":"","module_content_3":"","accordion":null,"content_connector":null,"download_box_heading":"","downloads":null,"menu_item":null},{"module":"side","content_type_1":"standard","padding":"pad-bottom","background":"none","image_position":"left","image_1":10000038639,"image_2":null,"video_file":null,"color":"","font_color":"","section_heading":"","module_content_1":"

Direct Adiabatic Cooling<\/h2>\r\n

Using the adiabatic process, outside air is cooled and humidified, then directly injected in the server room.<\/p>","module_content_2":"","module_content_3":"","accordion":null,"content_connector":null,"download_box_heading":"Downloads","downloads":[{"download_label":"EvaPack\u00ae<\/sup> Brochure","download_link":""},{"download_label":"Scaleway DC5 Data Center Case Study","download_link":""}],"menu_item":null},{"module":"side","content_type_1":"standard","padding":"pad-bottom","background":"none","image_position":"right","image_1":10000038647,"image_2":null,"video_file":null,"color":"","font_color":"","section_heading":"","module_content_1":"

Indirect Adiabatic Cooling<\/h2>\r\nAfter warm exhaust air has been cooled using the adiabatic process, it enters a heat recovery exchanger where it is used to cool fresh air. This solution is especially convenient when outside air must be cooled without increasing its humidity.","module_content_2":"","module_content_3":"","accordion":null,"content_connector":null,"download_box_heading":"","downloads":null,"menu_item":null},{"module":"full","content_type_1":"standard","padding":"pad-both","background":"image","image_position":"right","image_1":10000034767,"image_2":null,"video_file":null,"color":"","font_color":"font-light","section_heading":"","module_content_1":"

Adiabatic Process Psychrometric Chart<\/h2>\r\n

There are two common psychrometric design processes for evaporative humidification.<\/p>\r\n

Sensible heating: red horizontal lines<\/p>\r\n

Evaporative humidification: blue oblique lines<\/p>\r\n

Heating + humidification (line A-B-C)<\/p>\r\n

Pre-heating + humidification + post heating (line A-D-E-C)<\/p>\r\n

\"\"<\/p>\r\n

Both processes have humidity ratio (\u0394x) increase:<\/p>\r\n

from Xin (A) to Xout (C).<\/p>\r\n

The Saturation Efficiency (\u03b7) or Cooling Efficiency is expressed in % and corresponds to the ratio between the entering dry bulb temperature and exiting dry bulb temperature over the wet bulb depression:<\/p>\r\n

\u03b7 = Real cooling\/ Ideal cooling = (Tin - Tout ) \/ (Tin - Twb )<\/p>\r\n

with:\u00a0<\/strong><\/p>\r\n\r\n