Flash cycle optimization of Sabalan geothermal power plant employing exergy concept

Jalilinasrabady, Saeid; Itoi, Ryuichi; Valdimarsson, Páll; Sævarsdóttir, Guðrún; Fujii, Hikari

doi:10.1016/j.geothermics.2012.02.003

Cited by 102 publications

(23 citation statements)

References 17 publications

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“…Several researchers have studied the flash geothermal power system. Jalilinasrabady et al (2012) analyzed a single-flash geothermal power plant in Iran and evaluated a double-flash cycle for power generation to achieve optimum energy utilization. Dagdas (2007) conducted a performance analysis for a double-flash geothermal power plant and examined fundamental characteristics of the plant.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis and optimization of a flash-binary geothermal power generation system

2015

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Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis and optimization of a flash-binary geothermal power generation system

2015

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“…1). Notice that although a fluid coming from deep underground geothermal systems typically contains dissolved gases (such as H2S (Thorsteinsson et al, 2013)), silica (Sugita et al, 2003) and calcite (Hébert et al, 2010), it is assumed in this paper that its properties may be approximated as equal to those of pure water, which is in line with recent literature (e.g., Jalilinasrabady et al, 2012;Pambudi et al, 2014).…”

Section: Double-flash Reference Designmentioning

confidence: 65%

Improvement of Double-Flash geothermal power plant design: A comparison of six interstage heating processes

Sarr

Mathieu-Potvin

2015

Geothermics

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In this paper, six different modifications of the Double-Flash power plants are proposed. These modifications are named "interstage heating" and consist of additional heat exchangers properly located in the system. The six interstage heating designs are analysed, optimized and then compared to an optimized Double-Flash reference power plant. The objective function is the power plant specific output (kJ/kg), and the design variables are the separator temperatures (°C) and the split fraction. Optimizations are performed for a wide range of reservoir temperatures (i.e., from 140 °C to 240 °C). Results show that interstage heating processes may increase the specific output of the plant by about 5%, decrease the liquid content in the low pressure turbine by about 50%, and decrease the required cooling capacity of the plant by about 10%. On the other hand, the analysis showed that the new designs proposed have negligible influence on the high pressure turbine liquid content or on the silica saturation coefficient. Keywords

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“…The performance of GPP thermodynamics can be evaluated with thermal efficiency and exergy efficiency. The thermal efficiency and exergy efficiency for the system under consideration is defined as [12,13]:…”

Section: Thermodynamic Analysismentioning

confidence: 99%

Exergoeconomic analysis and optimization of a combined double flash – binary cycle for Ulubelu geothermal power plant in Indonesia

Rachmat

Wibowo

Surachman

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. In this paper, the combination of double-flash and binary cycles for Ulubelu geothermal power plant is proposed and optimized by using the Matlab software. This proposed system uses real data and properties of brine exploited from the Ulubelu geothermal well in Indonesia and four working fluid candidates, namely n-Pentane, R141b, R123 and R245fa are used in binary cycles. Optimization using a multi-objective genetic algorithm with an exergoenomic approach is applied to find out the proposed system performance from both thermodynamic and economic point of view. In the optimization procedure, the exergy efficiency and total specific cost of output power become objective functions while the first flash pressure, second flash pressure and Organic Rankine Cycle (ORC) turbine inlet temperature are selected as constraints. The system performance proposed in this paper is compared with the performance of the existing system. The results show that n-pentane is the best working fluid where multi-objective optimization indicates that the system can generate 63.54 MW of power with thermal and exergy efficiencies of 17.59% and 65.26% and specific cost of 1.7049 USD / GJ at the selected optimal design point. Compared to the existing system, there is a significant improvement in performance both from thermodynamic performance and economic performance.

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Flash cycle optimization of Sabalan geothermal power plant employing exergy concept

Cited by 102 publications

References 17 publications

Thermodynamic analysis and optimization of a flash-binary geothermal power generation system

Thermodynamic analysis and optimization of a flash-binary geothermal power generation system

Improvement of Double-Flash geothermal power plant design: A comparison of six interstage heating processes

Exergoeconomic analysis and optimization of a combined double flash – binary cycle for Ulubelu geothermal power plant in Indonesia

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