توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Mathematical study and analysis of Humidification– Dehumidification (HD) desalination with Direct contact condenser and comparison between direct and indirect contact method
نویسنده(ها): ، ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۷
The HD unit is the distillation under atmospheric condition by an air loop saturated with water vapor, and has three main sections: Humidifier, dehumidifier and heat source. In this article a comparison between HD desalination with direct contact and HD desalination with indirect contact with using an optimization software is presented. In this comparison noticeable result regarding, the consumption of energy and heat transfer area as been observed.<\div>

۲EXERGY ANALYSIS APPLICATION ON PARALLEL PLATE COUNTER FLOW HEAT EXCHANGERS
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۱۲
This paper shows that the main architectural features of a counter flow heat exchanger can be determined based on thermodynamic optimization. Heat exchangers have been evaluated by a combination of the thermodynamic relations, exergy concept and sink– source model in exergy analysis. The required expression for exergy losses calculation has been expanded Subject to volume constraint. It is assumed that the channels are formed by parallel plates, the two fluids are incompressible fluids or ideal gases, and the flow is fully developed, laminar or turbulent. It is shown that the irreversibility of the heat exchanger is minimized with respect to the ratio of the two channels spacing and ratio of the capacity rates of the two streams. The optimize dimensions can be determined respect to capital and energy cost “trade off ". The paper reveals that the applied methodology can be used to optimum operational factors with minimum exergy losses or cost.<\div>

۳Exergy Analysis of Single Mixed Refrigerant Process Used in LNG Plant
نویسنده(ها): ،
اطلاعات انتشار: هفتمین همایش ملی انرژی، سال
تعداد صفحات: ۷
This paper provides an exergy analysis for Single Mixed Refrigerant process used in LNG plants. The equation of exergy destruction and exergetic efficiency for the main system components such as heat exchanger, compressors and expansion valve are developed. The relations for total exergy destruction in the system and the system overall exergetic efficiency are obtained.<\div>

۴Optimization of Distillation Column Operation by Genetic Algorithm
نویسنده(ها): ، ، ،
اطلاعات انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۴
In this paper, an exergy analysis approach is proposed for optimal design of distillation column by using Genetic algorithm. First, the simulation of a distillation column is performed by using the shortcut results and irreversibility in each tray is obtained. a one target optimization algorithm (SA, Simulated Annealing) is used to maximize recovery in a simple column by six different variables (Feed Condition, Reflux Rate, Number of theoretical stage, Feed Trays (Feed Splitting, three variables)) (OPT1), and during the search for it, try to find a lower irreversibility index. Then, SAoptimization algorithm is used for a complex column with one pump–around and feed splitter to find better results (OPT2). in the end, two targets optimization algorithm (Genetic Algorithm) is used to find the maximum recovery and minimum Irreversibility Index in OPT1 and OPT2 conditions and results compare with SA (one target optimization) results.<\div>

۵Theoretical and experimental investigation of humidification process in mist formation state
نویسنده(ها): ، ،
اطلاعات انتشار: پانزدهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۶
In this paper, humidification process over a cross flow packed bed with an open air cycle is studied and a precision model is presented. Initial results show that air may become saturated with water vapor prior to its exit from the packed bed. In this case excess water vapor condenses asmist in air stream that named supersaturated state in some references. So the model was developed for mist formation (supersaturated) state and a complete mathematical model was introduced to predict the outlet condition of the air and water streams from the packed bed. Then the model was validated by using experimental results obtained from an experimental facility. Comparison of the theoretical and experimental results confirms the ability of the this model at prediction of outlet condition of air and water streams. Effective parameters on development of mist (supersaturated) zone were studied. Proposed model can be used in design of HD desalination units and result in better prediction of outlet condition of humidification process<\div>
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