On comparison of three multi-feed osmotic-mediation-based configurations for brine management: Techno-economic optimization and exergy analysis

Desalination ◽  
2022 ◽  
Vol 525 ◽  
pp. 115517
Author(s):  
Ali Naderi Beni ◽  
Iraj Ghofrani ◽  
Ali Moosavi
2016 ◽  
Vol 819 ◽  
pp. 523-529 ◽  
Author(s):  
Nasruddin ◽  
Septian Khairul Masdi ◽  
Arief Surachman

This study presents four analysis at unit 4 Kamojang geothermal power plant are exergy analysis at current condition, exergy efficiency optimization, economic optimization, and exergoeconomic optimization with wellhead valve pressure as a variable. Calculations are conducted by using the MATLAB. Thermodynamics characteristic of geothermal fluid assumed as water characteristic which get from REFPROP. Wellhead pressure operational condition 10 bar has exergy efficiency 31.91%. Exergy efficiency optimization has wellhead valve pressure 5.06 bar, exergy efficiency 47.3%, and system cost US$ 3,957,100. Economic optimization has well pressure 11 bar, exergy efficiency 22.13%, and system cost US$ 2,242,200. Exergoeconomic optimization has 15 optimum condition. Exergoeconomic optimization aims to analyze the optimum wellhead valve pressure for maximum exergy efficiency and minimum cost of power plant system.


2014 ◽  
Vol 20 (4) ◽  
pp. 511-521 ◽  
Author(s):  
Milena Todorovic ◽  
Dragoljub Zivkovic ◽  
Marko Mancic ◽  
Gradimir Ilic

In engineering practice exergy can be used for technical and economic optimization of energy conversion processes. The problem of increasing energy consumption suggests that heating plants, i.e. hot water boilers, as energy suppliers for household heating should be subjected to exergy and energy analysis. Heating plants are typically designed to meet energy demands, without the distinguished difference between quality and quantity of the produced heat. In this paper, the energy and exergy analysis of a gas fired hot water boiler is conducted. Energy analysis gives only quantitative results, while exergy analysis provides an insight into the actually available useful energy with respect to the system environment. In this paper, a hot water boiler was decomposed into control volumes with respect to its functional components. Energy and exergy of the created physical model of the hot water boiler is performed and destruction of exergy and energy loss in each of the components is calculated. The paper describes the current state of energy and exergy efficiency of the hot water boiler. The obtained results are analyzed and used to investigate possibilities for improvement of availability and reliability of the boiler. A comparison between the actual and the proposed more reliable solution is made.


2019 ◽  
Author(s):  
Arash Shadlaghani ◽  
Nastaran Barhemmati-Rajab ◽  
Weihuan Zhao

Author(s):  
Flávio Pacelli Ziviani de Oliveira ◽  
Henrique Neiva Guimarães ◽  
Breno Gusmão Barbosa

Author(s):  
Matheus Leone Borges ◽  
Laryssa Abdala ◽  
Silvio de Oliveira Junior ◽  
Carlos Eduardo Keutenedjian Mady
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