{"id":3389,"date":"2018-07-20T19:49:43","date_gmt":"2018-07-21T02:49:43","guid":{"rendered":"https:\/\/gurumuda.net\/physics\/?p=3389"},"modified":"2023-08-06T13:46:24","modified_gmt":"2023-08-06T13:46:24","slug":"coefficient-of-performance-cooling-machine","status":"publish","type":"post","link":"https:\/\/gurumuda.net\/physics\/coefficient-of-performance-cooling-machine.htm","title":{"rendered":"Coefficient of performance of the cooling machine"},"content":{"rendered":"

Article about Coefficient of performance of the cooling machine<\/p>\n

A cooling machine is a machine that takes heat from a low-temperature place, then transfers it to a high-temperature area. For this process to happen, the machine must do the work because the heat naturally flows from high temperature to low temperature. This is by Clausius’s statement:<\/span><\/span><\/span><\/p>\n

It is impossible for a cooling machine to transfer heat from a low-temperature place to a high-temperature place, without work (Second law of thermodynamics\u2014Clausius statement).<\/i><\/span><\/span><\/span><\/p>\n

The machine works (W) to transfer heat, from low temperature (Q<\/span><\/span><\/span>L<\/span><\/span><\/sub>) to high temperature (Q<\/span><\/span><\/span>H<\/span><\/span><\/sub>). Based on conservation of energy, Q<\/span><\/span><\/span>L<\/span><\/span><\/sub> + W = Q<\/span><\/span><\/span>H<\/span><\/span><\/sub>.<\/span><\/span><\/span><\/p>\n

If the heat engine uses the term efficiency, then the refrigerant uses the term coefficient of performance (CP<\/sub>). The coefficient of performance (CP<\/sub>) of refrigerant is the ratio between heat transferred from low temperature (Q<\/span><\/span><\/span>L<\/span><\/span><\/sub>) to work (W), which is done to transfer heat.<\/span><\/span><\/span><\/p>\n

\"Coefficient<\/p>\n

Ideal cooling machine’s coefficient of performance :<\/span><\/span><\/span><\/p>\n

\"Coefficient
\nT<\/span><\/span><\/span>L<\/sub> <\/span><\/span><\/span>= low temperature, T<\/span><\/span><\/span>H<\/span><\/span><\/sub> = high temperature<\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Article about Coefficient of performance of the cooling machine A cooling machine is a machine that takes heat from a low-temperature place, then transfers it to a high-temperature area. For this process to happen, the machine must do the work because the heat naturally flows from high temperature to low temperature. This is by Clausius’s … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_post_was_ever_published":false},"categories":[2],"tags":[],"class_list":["post-3389","post","type-post","status-publish","format-standard","hentry","category-basic-physics-tutorials"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/3389","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/comments?post=3389"}],"version-history":[{"count":1,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/3389\/revisions"}],"predecessor-version":[{"id":8516,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/3389\/revisions\/8516"}],"wp:attachment":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/media?parent=3389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/categories?post=3389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/tags?post=3389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}