{"id":3422,"date":"2021-04-12T11:09:28","date_gmt":"2021-04-12T04:09:28","guid":{"rendered":"https:\/\/dbm.com.vn\/product\/uncategorized\/cross-flow-heat-exchanger\/"},"modified":"2021-06-02T08:27:03","modified_gmt":"2021-06-02T01:27:03","slug":"cross-flow-heat-exchanger","status":"publish","type":"product","link":"https:\/\/dbm.com.vn\/en\/product\/cross-flow-heat-exchanger\/","title":{"rendered":"Cross-Flow Heat Exchanger"},"content":{"rendered":"<p>(Cross-Flow Heat Exchanger)<\/p>\n<p><em><span style=\"text-decoration: underline;\">Key Features:<\/span><\/em><\/p>\n<ul>\n<li>\u00a0<span class=\"fontstyle0\">For a full understanding of heat exchange by forced convection and measurement of heat transfer<\/span><\/li>\n<li><span class=\"fontstyle0\">Enables rapid assessment of heat transfer rates<\/span><\/li>\n<li><span class=\"fontstyle0\">Robust, bench-mounting product<\/span><\/li>\n<li><span class=\"fontstyle0\">Consists of wind tunnel with fully controllable air flow and heat-exchanger rod matrix<\/span><\/li>\n<li><span class=\"fontstyle0\">Separate pre-heated element with built-in thermocouple can take the place of any heat-exchanger rod<\/span><\/li>\n<li><span class=\"fontstyle0\">Includes comprehensive, accurate and easy-to-read digital instrumentation on a separate instrumentation unit<\/span><\/li>\n<li><span class=\"fontstyle0\">Instrumentation unit also includes a controlled heat source to pre-heat element<\/span><\/li>\n<\/ul>\n<p><em><span style=\"text-decoration: underline;\">Description:<\/span><\/em><\/p>\n<ul>\n<li>\u00a0<span class=\"fontstyle0\">For comprehensive studies into the principles and performance of heat exchangers. The equipment allows students to quickly assess heat transfer rates by forced convection. They monitor the rate of cooling of a body of known thermal capacity in an air flow.<\/span><\/li>\n<li><span class=\"fontstyle0\">The apparatus is bench mounting. It is a horizontal wind tunnel with a contraction cone, a working section, a diffuser, a constant speed fan, and an exhaust with silencer. A variable slide valve controls the air flow.<\/span><\/li>\n<li><span class=\"fontstyle0\">The working section includes a series of rods arranged in a matrix and at right-angles to the direction of air flow.<\/span><\/li>\n<li><span class=\"fontstyle0\">The copper element is of known thermal capacity and includes a built-in thermocouple. Students insert the element, which has been pre-heated to a specific temperature, into the working section at a known air velocity. They measure the time taken for the temperature to drop and determine the heat transfer rate.<\/span><\/li>\n<li><span class=\"fontstyle0\">A second thermocouple at the inlet to the wind tunnel measures the temperature of air entering the heat exchanger. <\/span><\/li>\n<li><span class=\"fontstyle0\">A Pitot traverse can measure air velocity at any vertical point in the working<br \/>\nsection, either before or after the rods<\/span><\/li>\n<li><span class=\"fontstyle0\">A digital display on the front of the instrumentation unit<br \/>\nallows students to view all experimental data.<\/span><\/li>\n<\/ul>\n<p><em><span style=\"text-decoration: underline;\">Learning Outcomes:<\/span><\/em><\/p>\n<ul>\n<li><span class=\"fontstyle0\">Determining the pressure losses created by the heat exchange rods and creating a chart of pressure drop against upstream pressure<\/span><\/li>\n<li><span class=\"fontstyle0\">Calculating the inlet velocity and the mean velocity through the rods<\/span><\/li>\n<li><span class=\"fontstyle0\">Determining the rate at which the heated rod cools down, within a bank of rods and by itself<\/span><\/li>\n<li><span class=\"fontstyle0\">Plotting \u2018cooling curves\u2019 and using them to find the coefficient of heat transfer (<\/span><span class=\"fontstyle2\">h<\/span><span class=\"fontstyle0\">) for the heated rod at various positions in the heat exchanger<\/span><\/li>\n<li><span class=\"fontstyle0\">Determining the velocity distribution (profile) downstream of the rods<\/span><\/li>\n<li><span class=\"fontstyle0\">Converting results into dimensionless values (typically using Nusselt, Prandtl and Reynolds equations)<\/span><\/li>\n<li><span class=\"fontstyle0\">Comparing results and producing heat transfer coefficient curves<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Product Code: TE93<\/p>\n","protected":false},"featured_media":3190,"template":"","meta":[],"product_cat":[31,884],"product_tag":[],"_links":{"self":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product\/3422"}],"collection":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/media\/3190"}],"wp:attachment":[{"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/media?parent=3422"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product_cat?post=3422"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/dbm.com.vn\/en\/wp-json\/wp\/v2\/product_tag?post=3422"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}