scholarly journals A Framework of Exergy Efficiency Analysis for Cogeneration Power Plant in Cement Production

2019 ◽  
Author(s):  
Dan Song ◽  
Ling Lin ◽  
Wei Bao
Keyword(s):  
Power Plant ◽  
Efficiency Analysis ◽  
Exergy Efficiency ◽  
Cement Production

scholarly journals Thermal and Exergy Efficiency Analysis of a Solar-driven Closed Brayton Power Plant with Helium and s-CO2 as Working Fluids

2019 ◽  
Vol 17 ◽  
pp. 383-389
Author(s):  
C. Arnaiz del Pozo ◽  
◽  
S. Sanchez-Orgaz ◽  
J. Rodríguez Martín ◽  
A. Jiménez Álvaro ◽  
...  
Keyword(s):  
Power Plant ◽  
Efficiency Analysis ◽  
Exergy Efficiency ◽  
Working Fluids

scholarly journals Analysis and Optimization of Atmospheric Drain Tank of Lng Carrier Steam Power Plant

2020 ◽  
Vol 8 (8) ◽  
pp. 568
Author(s):  
Igor Poljak ◽  
Toni Bielić ◽  
Vedran Mrzljak ◽  
Josip Orović
Keyword(s):  
Power Plant ◽  
Exergy Efficiency ◽  
Point Of View ◽  
Outlet Temperature ◽  
Steam Power ◽  
Stream Flows ◽  
Steam Power Plant ◽  
Carrier Energy ◽  
Reduced Gradient ◽  
Condensate System

The atmospheric drain condensate system of a marine steam power plant is described and evaluated from the energetic and exergetic point of view at a conventional liquefied natural gas (LNG) carrier. Energy loss and exergy destruction rate were calculated for individual stream flows joined in an atmospheric drain tank with variations of the main turbine propulsion speed rate. The energy efficiency of joining streams was noted to be above 98% at all observed points as the atmospheric drain tank was the direct heater. The exergy efficiency of the stream flows into the drain tank was in the range of 80% to 90%. The exergy stream flow to the tank was modeled and optimized by the gradient reduced gradient (GRG) method. Optimization variables comprised contaminated and clean condensate temperature of the atmospheric drain tank and distillate water inlet to the atmospheric drain tank with respect to condensate outlet temperature. The optimal temperatures improves the exergy efficiency of the tank as direct heater, to about 5% in port and 3% to 4% when the LNG carrier was at sea, which is the aim of optimizing. Proposals for improvement and recommendations are given for proper plant supervision, which may be implemented in real applications.

Exergy Analysis and Exergoeconomic Optimization with Multiobjective Method of Unit 4 Kamojang Geothermal Power Plant

2016 ◽  
Vol 819 ◽  
pp. 523-529 ◽  
Author(s):  
Nasruddin ◽  
Septian Khairul Masdi ◽  
Arief Surachman
Keyword(s):  
Power Plant ◽  
Exergy Analysis ◽  
Exergy Efficiency ◽  
Economic Optimization ◽  
Efficiency Optimization ◽  
Geothermal Power Plant ◽  
System Cost ◽  
Wellhead Pressure ◽  
Geothermal Power ◽  
Valve Pressure

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.

scholarly journals Exergy Efficiency Analysis of Embedded Pipe in Radiant Ceiling Cooling System

2013 ◽  
Vol 5 (15) ◽  
pp. 3876-3882
Author(s):  
Qingyun Shou ◽  
Rudong Chen ◽  
Yongquan Yang ◽  
Chengye Xu
Keyword(s):  
Cooling System ◽  
Efficiency Analysis ◽  
Exergy Efficiency
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