توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱An experimental & theoretical investigation on thermal performance of a gas–liquid thermosyphon heat pipe heat exchanger in a semi–industrial plant
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۷
Waste heat recovery is very important, because not only it reduces the expenditure of heat generation, but also it is of high priority in environmental consideration, such as reduction in greenhouse gases. One of the devices is used in waste heat recovery is heat pipe heat exchanger. An experimental and theoretical research has been carried out to investigate heat performance of an air to water thermosyphon heat pipe heat exchanger according to ε–NTU method. The experiments were done according to the following procedure: cold water with 0.1kg\s flows through the condensation section and hot air in a closed cycle is blown to the evaporation section. A blower with varying frequency of current turns in the mass flow rate between 0.14–0.6 kg\s and temperature range of 125–225°C.the results of experiments show that as the ratio of ch\ccrises the amount of heat being transferred goes up. The efficiency of heat pipe heat exchanger remains constant as the temperature of hot stream goes up but the amount of heat transferred increases.<\div>

۲Experimental &Theoretical Investigation of Pressure Drop across Tube Bundle of a THPHE and Introducing a New Correlation
اطلاعات انتشار: پنجمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
Hydrodynamic and thermal performance of a heat pipe heat exchanger depends on a number of parameters such as heat pipe diameter, bundle geometry, orientation, fin spacing and size, etc. In this paper experimental and theoretical research has been carried out to investigate the pressure drop across tube bundle of an air to liquid thermosyphon heat pipe heat exchanger (THPHE). According to experimental data and the other methods, a new correlation for THPHE with individual finned tubes and in–line geometry has been introduced. The error of pressure drop for 40 experimental points in the new correlation is less than %15. It indicates that the new correlation possesses an acceptable accuracy in the prediction of pressure drop.<\div>
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