{"id":2318,"date":"2023-06-01T12:57:59","date_gmt":"2023-06-01T12:57:59","guid":{"rendered":"https:\/\/fairconditioning.org\/fc-activity\/?post_type=activity&#038;p=2318"},"modified":"2023-06-01T12:59:57","modified_gmt":"2023-06-01T12:59:57","slug":"convection-in-a-room","status":"publish","type":"activity","link":"https:\/\/fairconditioning.org\/fc-activity\/activity\/convection-in-a-room\/","title":{"rendered":"Convection in a Room"},"content":{"rendered":"\n<p><strong><em>Objective: <\/em><\/strong>To understand the convective flow of air through the openings in a building&nbsp;<\/p>\n\n\n\n<p>Note: to be done in a relatively wind less space- say a corner of a room cordoned off&nbsp;<\/p>\n\n\n\n<p><strong><em>Outcome: <\/em><\/strong>Students develop a deeper understanding of convection that can help in designing passively cooled buildings having lower thermal loads<\/p>\n\n\n\n<p><strong><em>Requirements: <\/em><\/strong>Teaching aid model: room with two windows and a chimney, candles, small table fan,match box<\/p>\n\n\n\n<p><strong><em>Prerequisites: <\/em><\/strong>None<\/p>\n\n\n\n<p><strong><em>Procedure:&nbsp;&nbsp;<\/em><\/strong><\/p>\n\n\n\n<p><strong><em>Step 1: <\/em><\/strong>Place candles inside the teaching aid model as shown in the reference image.<\/p>\n\n\n\n<p><strong><em>Step 2: <\/em><\/strong>Light the candles inside the room for a few minutes. The air in this small space heats up<\/p>\n\n\n\n<p><strong><em>Step 3: <\/em><\/strong>Keep the fan beside the room model such that both the windows and axis of the fan\u2019s blades are collinear.<\/p>\n\n\n\n<p><strong><em>Step 4: <\/em><\/strong>Switch on the fan.<\/p>\n\n\n\n<p><strong><em>Step 5:<\/em><\/strong> Students can see a large amount of smoke (warm air) rising through the chimney, and a small amount coming out from the window on the opposite side of the fan.<\/p>\n\n\n\n<p><strong><em>Step 6:<\/em><\/strong>&nbsp; Discuss:<\/p>\n\n\n\n<ul>\n<li>Warm air naturally rises up.&nbsp;<\/li>\n\n\n\n<li>When it is forced through a narrow enclosed space such as a chimney, a greater vacuum gets created in the room ( imagine air flow in a tunnel-its faster)<\/li>\n\n\n\n<li>Which then draws cooler air from the surroundings-various openings- to circulate.&nbsp;<\/li>\n\n\n\n<li>This creates a continuous convective flow of air within the room.&nbsp;<\/li>\n\n\n\n<li>Based on the position and size of openings good cross ventilation is ensured<\/li>\n\n\n\n<li>What is the alternative for chimneys in this experiment? (Higher roofs, Roof vents?)<\/li>\n\n\n\n<li>Probe students to think of such design elements used in the traditional buildings where this principle has been applied for eg. courtyards.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><strong><em>Step 7:<\/em><\/strong> Experiment with different sized openings as well as different spaces and observe and understand how this convection as a principle is working in the spaces.\u00a0<\/p>\n\n\n\n<p><strong><em>Step 8:<\/em><\/strong> Discuss how the principle of convection of warm air rising inside a room can be used to design naturally cooler homes<\/p>\n\n\n\n<p><strong><em>Reference Image:<\/em><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"554\" height=\"201\" src=\"https:\/\/fairconditioning.org\/fc-activity\/wp-content\/uploads\/2023\/06\/Screenshot-2023-06-01-at-18.29.27.png\" alt=\"\" class=\"wp-image-2321\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Objective: To understand the convective flow of air through the openings in a building&nbsp; Note: to be done in a relatively wind less space- say a corner of a room cordoned off&nbsp; Outcome: Students develop a deeper understanding of convection that can help in designing passively cooled buildings having lower thermal loads Requirements: Teaching aid [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"activity_subject":[125],"academic_year":[68],"complexity":[59],"content_tags":[421,423,486],"activity_type":[361],"activity_duration":[172],"acf":[],"_links":{"self":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2318"}],"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=2318"}],"version-history":[{"count":3,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2318\/revisions"}],"predecessor-version":[{"id":2322,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2318\/revisions\/2322"}],"wp:attachment":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/media?parent=2318"}],"wp:term":[{"taxonomy":"activity_subject","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_subject?post=2318"},{"taxonomy":"academic_year","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/academic_year?post=2318"},{"taxonomy":"complexity","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/complexity?post=2318"},{"taxonomy":"content_tags","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/content_tags?post=2318"},{"taxonomy":"activity_type","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_type?post=2318"},{"taxonomy":"activity_duration","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_duration?post=2318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}