Exergoeconomic evaluation and optimization of a novel combined augmented Kalina cycle/gas turbine-modular helium reactor

Mahmoudi, S.M.S.; Pourreza, A.; Akbari, A.D.; Yari, Mortaza

doi:10.1016/j.applthermaleng.2016.08.011

Cited by 44 publications

(7 citation statements)

References 26 publications

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“…The ORC unit also required a lower operating pressure than the Kalina cycle unit. The results from the exergoeconomic analysis of a similar configuration were presented by Mahmoudi et al [151].…”

Section: Geothermal Heat Based Kalina Cycle Power Systemsmentioning

confidence: 54%

A review of recent research on the use of zeotropic mixtures in power generation systems

Modi

Haglind

2017

Energy Conversion and Management

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Section: Geothermal Heat Based Kalina Cycle Power Systemsmentioning

confidence: 54%

A review of recent research on the use of zeotropic mixtures in power generation systems

Modi

Haglind

2017

Energy Conversion and Management

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“…The exergy destruction cost of the individual components of the novel cycle is presented in Equations (17) and (18) as below [2]:Ċ…”

Section: Thermoeconomic Analysismentioning

confidence: 99%

“…The total exergy destruction of KLACC was larger than KPCC, as the condenser and second flash tank preheater resulted in major losses. Mahmoudi et al [17] combined a KC with a gas turbine modular helium reactor and concluded that the helium mass flow rate was reduced with the combined system favouring a size reduction of the system. As per the literature and by examination of other literature reviews, few exergoeconomic analyses of power generation systems suitable for medium-temperature applications have been conducted.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of a novel power generation system

Ganesh¹,

Maheswari

Srinivas

et al. 2021

IET Renewable Power Gen

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This paper introduces a novel power generation system using solar energy as a heat source. The proposed cycle incorporates heat sources from two solar collectors for the effective utilisation of heat energy. To aid the performance of the proposed system, the turbine flow rate is increased with the specific heater arrangements. Energy and exergy balances of the novel system were generated using Python software. The investigation of the present system was evaluated with high sink temperature. Turbine inlet concentration, turbine inlet pressure, HE 4 outlet temperature from the turbine, condenser concentration of ammonia, isentropic efficiency of the turbine and pressure ratio are the design variables considered for the exergy and thermoeconomic investigation. The energy and exergy analyses resulted in suitable design variables to optimise the performance. The optimum Kalina cycle efficiency, solar plant efficiency, exergy efficiency and network output were determined to be 18.51%, 8.28%, 34.51% and 295.24 kW, respectively. Among the components involved in the system, the mixers account for the highest exergy destruction followed by the turbine. The cycle performance can be improved by reducing the exergy destruction rate. The thermal efficiency is maximised by the turbine inlet pressure and temperature. Moreover, a higher relative cost difference has resulted in heat exchanger 5 and pump 2. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…8 This improvement occurred due to the good matching between zeotropic mixture temperature and the heat source temperature. 9 Water-ammonia mixture is one of the most efficient known zeotropic mixtures that is applied frequently as the working fluid of combined plants. 10,11 Yuan et al 12 proposed a combined ammonia-water power cycle and a refrigeration cycle integrated with a solar system.…”

Section: Introductionmentioning

confidence: 99%

“…Also, using binary mixtures in the power cycles leads to higher efficiencies 8 . This improvement occurred due to the good matching between zeotropic mixture temperature and the heat source temperature 9 . Water‐ammonia mixture is one of the most efficient known zeotropic mixtures that is applied frequently as the working fluid of combined plants 10,11 …”

Section: Introductionmentioning

confidence: 99%

Presenting and optimization of a novel ammonia‐water combined power and compression cooling system

Kazemiani‐Najafabadi

Rad

Deymi–Dashtebayaz

2022

Intl J of Energy Research

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Greenhouse gas emissions and increasing energy consumption motivate researchers toward using waste heat recovery. In the present study, a novel combined cooling and power (CCP) generation system driven by waste heat recovery of a steel factory in northeastern Iran is presented which uses an ammonia-water mixture as the working fluid and consists of a vapor generator, a superheater, a turbine, an expansion valve, a mixer, a compressor, an evaporator, two recuperators, two condensers, and two pumps. In the presented system, a non-isothermal phase change occurs in the vapor generator while an isothermal phase change happens in condensers. To evaluation of the system performance, comprehensive thermodynamic and thermoeconomic analyses are performed. The effects of generator pressure and ammonia concentration on the performance of the cycle are investigated. To satisfy different needs of users, the cycle is optimized by a genetic algorithm for different ratios of power to cooling capacity considering single and multi-objectives and the best values of generator pressure and ammonia concentration are presented for each power to cooling ratio. The results show that based on the multi-objective function, for heat source temperature of 573K the best conditions happen at power to cooling capacity ratio of 0.6, in which the optimum generator pressure and ammonia concentration are 43.87 bar and 79.49%, respectively.

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Exergoeconomic evaluation and optimization of a novel combined augmented Kalina cycle/gas turbine-modular helium reactor

Cited by 44 publications

References 26 publications

A review of recent research on the use of zeotropic mixtures in power generation systems

A review of recent research on the use of zeotropic mixtures in power generation systems

Performance assessment of a novel power generation system

Presenting and optimization of a novel ammonia‐water combined power and compression cooling system

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