مهدی مهرپویا
دانشیار، دانشکده علوم و فنون نوین، دانشگاه تهران، تهران، ایران
[ 1 ] - طراحی و بهینه‌سازی سیستم ترکیبی تجدیدپذیر برای تأمین بار حرارتی و الکتریکی مورد نیاز گلخانه‌ها
طراحی بهینه سیستمهای ترکیبی تجدیدپذیر برای تأمین بار حرارتی و الکتریکی مورد نیازگلخانهها مورد بررسی قرار میگیرد. آنالیز همزمان فنی و اقتصادی به طوریکه فرآیند مورد نظر از هر دو دیدگاه بهینه باشد انجام می شود. عملکرد اجزای مختلف سیستم به گونهای تنظیم شده است که علاوه بر پیشگرمایش سیال ورودی به اواپراتور و تنظیم این دما به مقدار مدنظر، بازیافت حرارتی غیر مستقیم زمین در زمان اوج بار و همچنین با...
[ 2 ] - Superstructure of Cogeneration of Power, Heating, Cooling and Liquid Fuels Using Gasification of Feedstock with Primary Material of Coal for Employing in LNG Process
Using absorption refrigeration cycles instead of vapor compression refrigeration cycles can drastically decrease energy consumption. In these systems, high level of energy consumption is reduced due to the partially elimination of vapor compression refrigeration systems. On the other hand, utilization of waste heat of the plant, which is a very good opportunity for energy saving, is possible. ...
[ 3 ] - Comprehensive Multi-Criteria Comparison and Ranking of Natural Gas Liquefaction Process by Analytic Hierarchy Process (AHP)
Several processes have been proposed for natural gas liquefaction due to the vast utilization of LNG as a reliable and relatively easy to use fuel. Even though the merits and demerits of different process have been studied, a dearth of comprehensive technical and economical comparative investigation of these methods makes further broad examination a necessity. This article is presented to addre...
[ 4 ] - Optimum Pressure Distribution in Design of Cryogenic NGL Recovery Processes
A type of novel hypercross-linked fiber adsorbent was obtained by sulfonation and cross-linking reaction of polypropylene fiber grafted styrene-divinylbenzene. The aim of the fiber sulfonation and cross-linking method was to prepare rigid three dimensional networks in the entire fiber and change the ion exchange capacity of fiber. The hypercross-linked fiber adsorbent possesses a principall...
[ 5 ] - Exergoeconomic Evaluation of LNG and NGL Co-production Process Based on the MFC Refrigeration Systems
In this paper, exergy and exergoeconomic analysis is performed on the recently proposed process forthe coproduction of liquefied natural gas (LNG) and natural gas liquids (NGL) based on the mixedfluid cascade (MFC) refrigeration systems, as one of the most important and popular natural gasliquefaction processes. To carry out this analysis, at first, the proposed process is sim...
[ 6 ] - Advanced Exergoeconomic Analysis of C3MR, MFC and DMR Refrigeration Cycles in an Integrated Cryogenic Process
C3MR, MFC, and DMR processes in an integrated LNG-NGL-NRU structure are investigated using the conventional and advanced exergy and exergoeconomic analyses. The results of advanced exergy analysis reveal that in most of the equipment, the highest amount of irreversibility is occurred because of endogenous exergy destruction. In C3MR process, compressor C5 with 9730 kW; in MFC process, compresso...
[ 7 ] - تحلیل اقتصادی - فنی کاهش مصرف آب و انتشار گاز دی‌اکسید کربن با بهره‌گیری از انرژیهای تجدیدپذیر برای تولید الکتریسیته (مطالعۀ موردی: نیروگاه بخاری بعثت تهران)
هدف اصلی پژوهش حاضر، معرفی نوعی سیستم هیبریدی تجدیدپذیر جایگزین، با نیروگاه بخاری بعثت تهران است. از آنجا که کمبود آب و انتشار گازهای گلخانهای، از مهم‌ترین دغدغههای زیست‌محیطی است، نیروگاههای فسیلی به دلیل میزان مصرف آب و نیز مقدار انتشار دی‌اکسید کربن، اهمیت درخور توجهی دارند. در مطالعۀ حاضر، ابتدا با معرفی نیروگاه بخاری بعثت تهران، انواع هزینههای مربوط به این نیروگاه از جمله هزینۀ مصرف آب...
[ 8 ] - Evaluation of an Integrated Cryogenic Natural Gas Process with the Aid of Advanced Exergy and Exergoeconomic Analyses
In this study, an integrated structure of the air separation unit, natural gas liquids recovery equipped with nitrogen removal unit is developed. In this regard, advanced exergy and exergoeconomic analyses are used to examine the irreversibility, possible improvements and the cost of the inefficiencies of the process. The exergy analysis presents information on the origin of the irreversibility...