توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱ANALYSIS OF NATURAL CONVECTION IN SQUARE ENCLOSURE WITH TWO ISOTHERMAL DISCRETE HEAT SORCES ON OPPOSITE VERTICAL WALLS
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
In this paper, analysis is carried out in order to investigate the effects of heat sources location on opposite vertical walls on heat transfer. The vertical walls are isothermally heated, while the horizontal walls are adiabatic. The two–dimensional unsteady problem is solved by means of the stream function–vorticity approach and the numerical solution is carried out by means of the finite difference technique. Results are obtained for Rayleigh number of 105. The results show that the required time to reach steady state condition is minimized when two heat sources are located on top of the walls. The finding also show that the average temperature of the fluid inside the enclosure reach to maximum value when the hot source on cool wall is located at the 0.2 £ Y£ 0.4 .<\div>

۲INVESTIGATION ON COOLING POTENTIAL OF EVAPORATIVE WATER COOLER TO PRODUCE CHILLED WATER
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
The potential of evaporative water cooler (EWC) to produce chilled water and the effects of ambient air conditions and air flow rate on it have been investigated here. An implicit marching finite–difference scheme is employed for solving the governing heat and mass transfer equations. Numerical results show that the amounts of chilled and evaporated water are increased by increasing the air flow rate and there is an optimum air flow rate which leads to production of chilled water at higher humidity. This optimum value depends on ambient air temperature too and decreases with the increase of it.<\div>

۳INVESTIGATION ON THE EFFECTS OF FLOW DIRECTION AND CHARACTERISTICS OF DIRECT EVAPORATIVE COOLER (DEC) ON THERMAL PERFORMANCE
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
The effects of air stream direction in channels and geometrical characteristics of the system on thermal performance have been investigated here. For this, mathematical model based on the conservation equations of mass, momentum and energy was developed to determine the heat and mass transfer characteristics of the system. A FORTRAN90 code has been developed for modeling the cocurrent, countercurrent and cross flow layouts. Finally the results have been analyzed and mutually compared. The findings show that a higher performance is achieved by using the DEC with cocurrent configuration and the performance of cocurrent type is higher than countercurrent and cross flow types. In addition, the results show the performance of DEC increases by decreasing plate spacing and increasing the wettability of heat exchanger.<\div>
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