{"id":3908,"date":"2021-10-04T14:21:27","date_gmt":"2021-10-04T12:21:27","guid":{"rendered":"https:\/\/www.bewastewaterfree.com\/eco-pedia\/heat-exchange\/"},"modified":"2024-03-13T20:41:59","modified_gmt":"2024-03-13T19:41:59","slug":"heat-exchange","status":"publish","type":"eco-pedia","link":"https:\/\/eco-techno.it\/en\/eco-pedia\/heat-exchange\/","title":{"rendered":"Heat exchange"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Heat exchange occurs through three mechanisms:<\/p>\n\n<ul class=\"wp-block-list\"><li>Conduction<\/li><li>Convection<\/li><li>Radiation<\/li><\/ul>\n\n<p class=\"wp-block-paragraph\">In a vacuum evaporator, heat necessary for liquid evaporation comes primarily through conduction, where the liquid contacts a heated metal surface directly. The heat transfer depends on factors such as surface area, thermal gradient (delta T), material properties, fouling, and surface geometry, inversely proportional to surface thickness.<\/p>\n\n<p class=\"wp-block-paragraph\">Transitioning 1 kg of water from room to boiling temperature and vapor phase under atmospheric pressure (101 kPa) demands about 2500 kJ (approximately 700 Wh) , typically lost without condensation heat recovery. Vacuum evaporation systems recycle this energy within the cycle, minimizing water evaporation energy consumption. Various technologies achieve this:<\/p>\n\n<ul class=\"wp-block-list\"><li>Vacuum evaporation with heat pumps<\/li><li>Multiple effect vacuum evaporation<\/li><li>Mechanical vapor recompression<\/li><\/ul>\n\n<p class=\"wp-block-paragraph\">Such approaches can reduce energy consumption by around 25 times compared to atmospheric evaporation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Heat exchange occurs through three mechanisms: Conduction Convection Radiation In a vacuum evaporator, heat necessary for liquid evaporation comes primarily through conduction, where the liquid contacts a heated metal surface directly. The heat transfer depends on factors such as surface area, thermal gradient (delta T), material properties, fouling, and surface geometry, inversely proportional to surface [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-3908","eco-pedia","type-eco-pedia","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/eco-techno.it\/en\/wp-json\/wp\/v2\/eco-pedia\/3908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eco-techno.it\/en\/wp-json\/wp\/v2\/eco-pedia"}],"about":[{"href":"https:\/\/eco-techno.it\/en\/wp-json\/wp\/v2\/types\/eco-pedia"}],"wp:attachment":[{"href":"https:\/\/eco-techno.it\/en\/wp-json\/wp\/v2\/media?parent=3908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}