{"id":2502,"date":"2023-06-19T09:00:50","date_gmt":"2023-06-19T09:00:50","guid":{"rendered":"https:\/\/fairconditioning.org\/fc-activity\/?post_type=activity&#038;p=2502"},"modified":"2023-06-19T09:00:50","modified_gmt":"2023-06-19T09:00:50","slug":"enthalpy-comparison-of-air","status":"publish","type":"activity","link":"https:\/\/fairconditioning.org\/fc-activity\/activity\/enthalpy-comparison-of-air\/","title":{"rendered":"Enthalpy Comparison of Air"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-2\">\n<div class=\"wp-block-column is-layout-flow\">\n<h5 class=\"wp-block-heading\">Objective<\/h5>\n\n\n\n<p>To develop an understanding that air at the same dry bulb temperature can have different enthalpies.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Outcome<\/h5>\n\n\n\n<p>Students will realize that energy required to cool a space increases with increase in wet bulb temperature (as cooling requires lowering of enthalpy of ambient condition).<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Requirements<\/h5>\n\n\n\n<p>Psychrometric chart.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Prerequisites<\/h5>\n\n\n\n<ol>\n<li>Conceptual knowledge of psychrometry.<\/li>\n\n\n\n<li>Understanding of psychrometric chart.<\/li>\n<\/ol>\n\n\n\n<h5 class=\"wp-block-heading\">Procedure<\/h5>\n\n\n\n<p><strong><em>Step 1: <\/em><\/strong>Plot the following on the psychrometric chart-<\/p>\n\n\n\n<ol>\n<li>DB=35 \u00b0C, WB=25 \u00b0C, RH=45%<\/li>\n\n\n\n<li>DB=35 \u00b0C, WB=20 \u00b0C, RH=25%<\/li>\n<\/ol>\n\n\n\n<p><strong><em>Step 2: <\/em><\/strong>Ask the following question to students: Which of these \u2018air conditions\u2019 have more energy?<\/p>\n\n\n\n<p><strong><em>Ans:<\/em><\/strong><em> Enthalpy of air at condition (a) (75 kJ\/kg) &gt; Enthalpy of air at&nbsp; the first condition (b) (57 kJ\/kg)<\/em><\/p>\n\n\n\n<p><strong><em>Reference image:&nbsp;<\/em><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/FpuGD6lXnIw3bKgqgM7yPtEpJR1zOLNNwW_bCCKpqJAosON_dAR8q-mEg3it-vrNKiYNWf9v3qG328kUWxVtpUegC0w9LhAPDbv7-1tnTXEzcGQT_wk-P18lexAn-4Hsbm3-4bEFjh3I8ZYsLqZ4HQ\" alt=\"\"\/><\/figure>\n\n\n\n<p><em>Psychrometric Chart for different air conditions<\/em><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">References<\/h5>\n\n\n\n<p>None<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Source of Idea<\/h5>\n\n\n\n<p><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Objective To develop an understanding that air at the same dry bulb temperature can have different enthalpies. Outcome Students will realize that energy required to cool a space increases with increase in wet bulb temperature (as cooling requires lowering of enthalpy of ambient condition). Requirements Psychrometric chart. Prerequisites Procedure Step 1: Plot the following on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"activity_subject":[124,125],"academic_year":[68,69],"complexity":[60],"content_tags":[387,514],"activity_type":[371],"activity_duration":[516],"acf":[],"_links":{"self":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2502"}],"collection":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity"}],"about":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/types\/activity"}],"author":[{"embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/comments?post=2502"}],"version-history":[{"count":1,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2502\/revisions"}],"predecessor-version":[{"id":2503,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2502\/revisions\/2503"}],"wp:attachment":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/media?parent=2502"}],"wp:term":[{"taxonomy":"activity_subject","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_subject?post=2502"},{"taxonomy":"academic_year","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/academic_year?post=2502"},{"taxonomy":"complexity","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/complexity?post=2502"},{"taxonomy":"content_tags","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/content_tags?post=2502"},{"taxonomy":"activity_type","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_type?post=2502"},{"taxonomy":"activity_duration","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_duration?post=2502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}