{"id":6196,"date":"2015-05-29T13:15:25","date_gmt":"2015-05-29T17:15:25","guid":{"rendered":"http:\/\/www.qats.com\/cms\/?p=6196"},"modified":"2015-06-04T11:59:05","modified_gmt":"2015-06-04T15:59:05","slug":"qpedia-issue-96-just-published","status":"publish","type":"post","link":"https:\/\/www.qats.com\/cms\/2015\/05\/29\/qpedia-issue-96-just-published\/","title":{"rendered":"Qpedia Issue 96 Just Published"},"content":{"rendered":"<p>Qpedia, Issue 96 has just been released and can be downloaded at: <a href=\"http:\/\/www.qats.com\/Qpedia-Thermal-eMagazine\/Back-Issues\">http:\/\/www.qats.com\/Qpedia-Thermal-eMagazine\/Back-Issues<\/a><\/p>\n<p><a href=\"http:\/\/www.qats.com\/cms\/wp-content\/uploads\/2015\/05\/Qpedia_Issue96_cover.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"  alignnone wp-image-6197 \" src=\"http:\/\/www.qats.com\/cms\/wp-content\/uploads\/2015\/05\/Qpedia_Issue96_cover.jpg\" alt=\"Qpedia_Issue96_cover\" width=\"495\" height=\"768\" \/><\/a><\/p>\n<p>Featured articles include:<\/p>\n<p><strong>Using Integrated Planar Thermosyphon PCBs to Enhance Cooling of High Brightness LEDs<\/strong><\/p>\n<p>Because high brightness LEDs have a heat flux that reaches an excess of 80 W\/cm<sup>2<\/sup>, thermal management is critical to ensure the LED properly performs. This article discusses the promising idea of improving the heat dissipation from the LED package to the PCB using thermosyphons. While the concept of a planar thermosyphon to enhance heat transfer by itself is not new, integrating it into a printed circuit board is innovative and appears to be a promising technology.<\/p>\n<p><strong>Nanofluids in Heat Pipes<\/strong><\/p>\n<p>The thermophysical properties of the working fluid have a direct impact on a heat pipe\u2019s performance. Water is the most common and effective heat transfer fluid in the electronics cooling industry, but its properties can be enhanced by adding nano-particles. This article discusses what nanofluids are available and their benefits on a heat pipe\u2019s performance.<\/p>\n<p><strong>Fundamentals: Effective Thermal Conductivity of a Heat Pipe<\/strong><\/p>\n<p>In this new section, Qpedia reviews fundamental thermal engineering principles, calculations and equations needed for the successful cooling of electronics. This issue we discuss how to identify the thermal conductivity of a heat pipe.<\/p>\n<p><strong>Industry Developments: Cooling COB LEDs<\/strong><\/p>\n<p>Chip-on-board (COB) LED\u2019s are one of the most widely used types of LED packaging. However, the tight spacing between the LEDs and small light emitting surface that make COB LEDs attractive, also present high heat fluxes that must be addressed. Because COBs have such a small surface area, addressing power density is the primary challenge. This article reviews the recent methods that LED manufacturers are using to cool COB LEDs.<\/p>\n<p><strong>Technology Review: Phase Change Materials<\/strong><\/p>\n<p>Qpedia reviews innovative technologies developed for electronics cooling applications. This section presents selected patents that were awarded to developers around the world to address cooling challenges. In this issue our spotlight is on phase change materials.<\/p>\n<p><a href=\"http:\/\/www.qats.com\/Qpedia\/Qpedia_Issue96.ashx\">Download Issue 96<\/a><\/p>\n<p><em>Not a Qpedia subscriber?<\/em><a href=\"http:\/\/www.qats.com\/Qpedia-Thermal-eMagazine\/Subscribe-to-Qpedia\"> Sign up now<\/a> and find out why over 18,000 read Qpedia every month.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qpedia, Issue 96 has just been released and can be downloaded at: http:\/\/www.qats.com\/Qpedia-Thermal-eMagazine\/Back-Issues Featured articles include: Using Integrated Planar Thermosyphon PCBs to Enhance Cooling of High Brightness LEDs Because high brightness LEDs have a heat flux that reaches an excess &hellip; <a href=\"https:\/\/www.qats.com\/cms\/2015\/05\/29\/qpedia-issue-96-just-published\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[160],"tags":[],"class_list":["post-6196","post","type-post","status-publish","format-standard","hentry","category-qpedia-thermal-emagazine"],"_links":{"self":[{"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/posts\/6196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/comments?post=6196"}],"version-history":[{"count":0,"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/posts\/6196\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/media?parent=6196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/categories?post=6196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qats.com\/cms\/wp-json\/wp\/v2\/tags?post=6196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}