Optimization and Exergy Analysis of Natural Gas Liquid Recovery Processes for the Maximization of Plant Profits

2018 ◽  
Vol 42 (1) ◽  
pp. 182-195 ◽  
Author(s):  
Haili Hu ◽  
Hong Jiang ◽  
Jiaqiang Jing ◽  
Hongyu Pu ◽  
Jiatong Tan ◽  
...  
Keyword(s):  
Natural Gas ◽  
Exergy Analysis ◽  
Recovery Processes

Exergy Analysis of Monoethylene glycol recovery processes for hydrate inhibition in offshore natural gas fields

2016 ◽  
Vol 35 ◽  
pp. 798-813 ◽  
Author(s):  
Alexandre Mendonça Teixeira ◽  
Lara de Oliveira Arinelli ◽  
José Luiz de Medeiros ◽  
Ofélia de Queiroz F. Araújo
Keyword(s):  
Natural Gas ◽  
Exergy Analysis ◽  
Recovery Processes ◽  
Gas Fields ◽  
Monoethylene Glycol

Advanced exergy analysis of an electricity-generating facility using natural gas

2014 ◽  
Vol 82 ◽  
pp. 146-153 ◽  
Author(s):  
Emin Açıkkalp ◽  
Haydar Aras ◽  
Arif Hepbasli
Keyword(s):  
Natural Gas ◽  
Exergy Analysis

Exergy Analysis of a Novel Cryogenic Concept for the Liquefaction of Natural Gas Integrated Into an Air Separation Process

2016 ◽  
Author(s):  
S. Tesch ◽  
T. Morosuk ◽  
G. Tsatsaronis
Keyword(s):  
Natural Gas ◽  
Power Consumption ◽  
Exergy Analysis ◽  
Primary Energy ◽  
Separation Process ◽  
Air Separation ◽  
Total Power ◽  
Separation Unit ◽  
Total Power Consumption ◽  
Liquefaction Temperature

The increasing demand for primary energy leads to a growing market of natural gas and the associated market for liquefied natural gas (LNG) increases, too. The liquefaction of natural gas is an energy- and cost-intensive process. After exploration, natural gas, is pretreated and cooled to the liquefaction temperature of around −160°C. In this paper, a novel concept for the integration of the liquefaction of natural gas into an air separation process is introduced. The system is evaluated from the energetic and exergetic points of view. Additionally, an advanced exergy analysis is conducted. The analysis of the concepts shows the effect of important parameters regarding the maximum amount of liquefiable of natural gas and the total power consumption. Comparing the different cases, the amount of LNG production could be increased by two thirds, while the power consumption is doubled. The results of the exergy analysis show, that the introduction of the liquefaction of natural gas has a positive effect on the exergetic efficiency of a convetional air separation unit, which increases from 38% to 49%.

scholarly journals Energy and Exergy Analysis of Different Exhaust Waste Heat Recovery Systems for Natural Gas Engine Based on ORC

2019 ◽  
Author(s):  
Guillermo Valencia ◽  
Armando Fontalvo ◽  
Yulineth Cardenas ◽  
Jorge Duarte ◽  
Cesar Isaza
Keyword(s):  
Natural Gas ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Exergy Analysis ◽  
Waste Heat ◽  
Natural Gas Engine ◽  
Exhaust Waste Heat ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Net Power Output

One way to increase overall natural gas engine efficiency is to transform exhaust waste heat into useful energy by means of a bottoming cycle. Organic Rankine cycle (ORC) is a promising technology to convert medium and low grade waste heat into mechanical power and electricity. This paper presents an energy and exergy analysis of three ORC-Waste heat recovery configurations by using an intermediate thermal oil circuit: Simple ORC (SORC), ORC with Recuperator (RORC) and ORC with Double Pressure (DORC), and Cyclohexane, Toluene and Acetone have been proposed as working fluids. An energy and exergy thermodynamic model is proposed to evaluate each configuration performance, while available exhaust thermal energy variation under different engine loads was determined through an experimentally validated mathematical model. Additionally, the effect of evaportating pressure on net power output , absolute thermal efficiency increase, absolute specific fuel consumption decrease, overall energy conversion efficiency, and component exergy destruction is also investigated. Results evidence an improvement in operational performance for heat recovery through RORC with Toluene at an evaporation pressure of 3.4 MPa, achieving 146.25 kW of net power output, 11.58% of overall conversion efficiency, 28.4% of ORC thermal efficiency, and an specific fuel consumption reduction of 7.67% at a 1482 rpm engine speed, a 120.2 L/min natural gas Flow, 1.784 lambda, and 1758.77 kW mechanical engine power.

Exergy analysis of nutrient recovery processes

2003 ◽  
Vol 48 (1) ◽  
pp. 27-36 ◽  
Author(s):  
D. Hellström
Keyword(s):  
Wastewater Treatment ◽  
Exergy Analysis ◽  
Chemical Elements ◽  
Source Separation ◽  
Chemical Processes ◽  
Nutrient Recovery ◽  
Black Water ◽  
Recovery Processes ◽  
Exergy Consumption ◽  
Physical And Chemical

In an exergy analysis, the actual consumption of resources in physical and chemical processes is calculated. Energy and chemical elements are not consumed in the processes - they are only transformed into other forms with lower quality. The principals of exergy analysis are illustrated by comparing different wastewater treatment systems for nutrient recovery. One system represents an end-of-pipe structure, whereas other systems include source separation of grey water, black water, and urine. The exergy flows analysed in this paper are those related to management and treatment of organic matter and nutrients. The study shows that the total exergy consumption is lowest for the system with source separation of urine and faeces and greatest for the conventional wastewater treatment system complemented by processes for nutrient recovery.

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