Gholamreza Salehi
Islamic Azad University, Central Tehran Branch, Tehran, Iran
[ 1 ] - Analyzing and Comparing Energy and Exergy of POXR and SMR Reactors for Producing Hydrogen from Methane Gas
The POXR and SMR methods adopted in producing hydrogen from methane gas are simulated and exergy analysis of both the processes are run for comparison. The effective parameters of the feeding materials ratio and the system temperature for maximizing hydrogen production and increasing efficiency are assessed here. Influenced by the changes in these parameters the unit efficiency is increased up ...
[ 2 ] - Area Energy and Throughput Targeting in Debottlenecking of Heat Exchanger Networks with Decomposition Approach
For energy saving retrofit projects, its economics are usually evaluated in terms of capital investment and payback time. The capital investment is in direct relation to the total heat recovery area of the network and the payback time factor is base on both the area and the energy savings. The debottlenecking is an increased throughput, which can be profitable in economic sense. The combination...
[ 3 ] - Distillation Column Identification Using Artificial Neural Network
 Abstract: In this paper, Artificial Neural Network (ANN) was used for modeling the nonlinear structure of a debutanizer column in a refinery gas process plant. The actual input-output data of the system were measured in order to be used for system identification based on root mean square error (RMSE) minimization approach. It was shown that the designed recurrent neural network is able to pr...
[ 4 ] - Optimization of Distillation Column Operation by Simulated Annealing
Abstract: In this paper, an exergy analysis approach is proposed for optimal design of distillation column by using simulated annealing algorithm. First, the simulation of a distillation column was performed by using the shortcut results and irreversibility in each tray was obtained. The area beneath the exergy loss profile was used as Irreversibility Index in the whole column. Then, First Opti...
[ 5 ] - The Design of the Best Heat Integrated Separation Systems Using Harmony Search Algorithm
The synthesis of heat integrated multi-component distillation systems is complex due to its huge search space for structural combination and optimization computation. To provide a systematic approach and tools for the synthesis design of distillation systems, a new method for modeling heat integrated columns is presented, and the operating cost objective function is minimized by improved harmon...
[ 6 ] - The Design and Optimization of Distillation Column with Heat and Power Integrated Systems
Based on two integration steps, an optimization framework is proposed in this work for the synthesis and design of complex distillation sequence. The first step is to employ heat integration in sequence and reduce the heat consumption and total annual cost of the process. The second one is to increase the exergetic efficiency of sequence by generating power in implemented expanders in sequence....
[ 7 ] - تحلیل اگزرژی و ترمواکونومیک و بهینه سازی یک سیستم CCHP با ذخیره سازی حرارتی برای استفاده در یک مجتمع مسکونی
In this study, the optimization and analysis of exergy and thermoelectronics of a combined heat and power generation system, heat and cold with thermal storage for use in a residential complex with an area of 147,000 square meters, with the main driving motive of the internal combustion engine. The optimization of the system is based on the annual cost minimization and in two modes of using a...
[ 8 ] - تحلیل انرژی و اگزرژی سیکل تولید توان موتور دیزل دریایی به منظور کاهش اتلافات با در نظر گرفتن تاثیر دمای محیط
در مقاله حاضر سیکل تولید توان موتور چهارزمانه دیزل دریایی مورد مطالعه و تحلیل ترمودینامیکی قرار میگیرد. در این راستا، پس از مدلسازی سیکل کلی، اجزای مختلف آن از دیدگاه قانون اول و دوم ترمودینامیک مورد تحلیل و بررسی قرار میگیرند تا مشخص شود هر یک از اجزا چه تاثیری در عملکرد سیکل دارند و چگونه می توان کارایی آنها را افزایش داد. همچنین تاثیر دمای هوای محیط بر عملکرد موتور مورد بررسی قرار گرفته ...
[ 9 ] - Identification of the Sources of Energy Loss through Exergy Analysis: Case Study of Marun Mega-Olefin Plant
One of the industries with high potential for energy saving is the petrochemical industry. Ethylene and propylene production plants (olefin plants) – as a part of the petrochemical industry – are very energy intensive. So, any try to improve their energy consumption efficiency could lead to a high amount of energy saving. Iran’s petrochemical industry uses old technologies and components and du...
[ 10 ] - The Energy and Exergy Analysis of Integrated Hydrogen Production System Using High Temperature Steam Electrolysis with Optimized Water Path (RESEARCH NOTE)
In this research, solar-drived integrated Hydrogen production (HP) using high-temperature steam electrolysis (HTSE) is thermodynamically evaluated. This system includes an organic Rankine cycle (ORC), Rankine cycle, Brayton cycle, solar tower, and High Temperature Steam Electrolysis (HTSE). Solar energy supplies thermal energy. This heat source is applied for generating power. This energy is us...
[ 11 ] - Multi-Criteria Analysis for the Use of Carbon Dioxide Generated In the Gas Plant
CO2 plays the most important role in pollution due to greenhouse gases, which causes global warming and climate change. Unfortunately, CO2 emission has increased significantly in recent decades. So, it is crucial to capture CO2. On the other hand, CO2 can be utilized for commercial products. There is plenty of CO2 utilization such as enhanc...
[ 12 ] - Techno-Economic and Environmental Evaluation of Expansion Turbines for Gas Field Improvement (Case study)
Regarding the increased energy consumption of the processes at the operational units in the National Iranian Oil Company, the present study analyzed energy consumption at one of the gas refineries. In this refinery, which is the main supplier of Fajr Jam refinery for the national gas network, as well as an injection into the oil fields of the Iranian South oil company, the pressure of gas after...
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