To counter global warming, the interest in next generation lower GWP(Global Warming Potential)new refrigerants increases with their thermodynamics and heat transfer characteristics. But since these refirigerant are mixture of some refrigerants and some of them are non-azeotropic, the heat transfer mechanism has not been clarified yet.
\nThis research aims to grasp the heat transfer mechanisms of next generation lower GWP refrigerants (R454C, R466A, etc.) during evaporation and condensation processes in the smoothed circular tube. The measurement experiment of the heat transfer coefficient and pressure drop will be performed under various kinds of conditions such as temperature, mass flow rate, and inlet quality of the refrigerant with visualization techniques of high speed camera and PIV. Finally, semi-empirical besed formula will be developed.<\/p>\n
The research plan for the purpose as below:
\n1.Setup the experimental bench, making the two-phase flow controlled with mass flow rate, temperature, and quality.
\n2.The experimental bench and procedure will be validated using R32, the typical refrigerant in this research field.
\n3.The measurement and data reduction of HTC will be performed for the low GWP refrigerant (R454C, R466A, etc.)
\n4.Semi-empirical based correlations of heat transfer and pressure drop are developed for the system design.<\/p>\n
Prospects:
\nThe information of HTC of low GWP refrigerants is essential information for the pre-designing process of HVAC system. The accurate simulation and development process can be established through the result of this research. This finally realizes the optimum device & system design.<\/p>\n","protected":false},"excerpt":{"rendered":"
To counter global warming, the interest in next generation lower GWP(Global Warming Potential)new refrigerants […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[109],"tags":[28],"class_list":["post-7623","post","type-post","status-publish","format-standard","hentry","category-prj","tag-research","lang-ja","sr-environment"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/posts\/7623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/comments?post=7623"}],"version-history":[{"count":1,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/posts\/7623\/revisions"}],"predecessor-version":[{"id":9031,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/posts\/7623\/revisions\/9031"}],"wp:attachment":[{"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/media?parent=7623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/categories?post=7623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.waseda.jp\/fsci\/wise\/wp-json\/wp\/v2\/tags?post=7623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}