European Journal of applied science and technology-Novus(Ejast)

Vol 01, Issue 04, 2021

Paper id: 01000012EJAST    Open Access    


Year: 2022  Abstract              Full Paper       [Download]           Page: 1-11

Abstract: In recent years, wind power has been widely recognized and used as one of the most promising renewable energy sources. However, there exists sufficient difference in the available wind perspective and the overall power production. It is essential to eliminate this energy problem in Pakistan by optimizing the design of renewable energy resources. Pakistan has very good wind potential, especially in the provinces of Sindh and Baluchistan. In the current research study, a 10,000-watt horizontal axis wind turbine (HAWT) is designed for the Taftan, Baluchistan region to meet the energy requirements of Pakistan. The Blade Element Momentum (BEM) method is utilized to design the HAWT blade profile while computational fluid dynamics (CFD) analysis is conducted to evaluate the designed profile.

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Paper id: 01000013EJAST    Open Access    

Title: Aspen Plus Simulation of CO2 capturing from flue gases in HUBCO Power Plant

Year: 2022  Abstract              Full Paper       [Download]           Page: 12-33

Abstract: The amount of carbon dioxide (CO2) increases day by day all around the globe. As CO2 is the 4th most copious gas in the Earth’s atmosphere. Many ways to reduce the emissions of CO2 but most of them are much costly to use them. To address this problem capturing emissions of CO2 by using absorbent monoethanolamine (MEA) by using the post-combustion method. The aim of our work is to set up an adequate and verified computerized-based process model that is capable of the severe simulation and analysis of the treatment of flue gas, evaluating the purification of flue gas to see the environmental facet and further possible process improvements. For that concept, we collaborate on our project with HUBCO Power Plant. The parameters, we required for project execution, of flue gas like pressure, temperature, mass flow rate and concentration of different gases from them. For the simulation of the capturing of CO2, we use Aspen plus V11. Flue Gas from HUBCO Power Plant was injected into Carbon Capturing Unit after Pre-Processing (NOx & SOx removed from Flue Gas). In Absorber Section, MEA Solvent and Carbon Dioxide in Flue Gas react with each other and form a Solution. The Solution from the Absorber passed through the Heat Exchanger where the low-pressure stream is used to raise the temperature of the solution mixture. This high-temperature solution was injected into the stripper where Carbon Dioxide and MEA separated as a result of a Chemical Reaction. MEA is reused while CO2 can be stored after some processing like liquefication and purification. A model is developed by optimization of different parameters like Concentration of solvent, solvent pressure, solvent temperature, absorber packing height and reboiler duty to achieve objectives. While the demand for reduction in CO2 emission is increasing, the cost of the CO2 capture processes remains a limiting factor for large-scale application. . In this paper, a definition of the economic baseline for post-combustionCO2 capture from 225 MWe bituminous diesel-fired power plant is described. The baseline capture process is based on a 30% (by weight) aqueous solution of monoethanolamine (MEA). A process model has been developed previously using the Aspen Plus simulation program where the baseline CO2 removal has been chosen to be 84%. The economic results show a minimum capital cost of 34M USD/period with an operating cost of 13M USD/period at an interest rate of 20% with optimized process conditions of 0.3 mol CO2/mol MEA lean solvent loading, using a 30 wt. % MEA solution and a stripper operating pressure of 2 bar.

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