Thermodynamic analysis of a new combined cooling and power system using ammonia–water mixture

Wang, Jianyong; Zhao, Pan; Dai, Yiping

doi:10.1016/j.enconman.2016.03.019

Cited by 122 publications

(26 citation statements)

References 37 publications

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“…In parallel, many studies have been carried out on cogeneration, tri-generation and multi-generation systems employing binary mixtures such as the ammonia-water solutions [6,7]. To utilize low-temperature heat sources, the organic Rankine cycle (ORC) and the Kalina cycle (KC) have both been demonstrated to be reliable and applied extensively in electricity generation [8][9][10][11][12][13][14]. To produce cooling, absorption chillers are widely utilized.…”

Section: Introductionmentioning

confidence: 99%

Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Javanshir

Kordlar

et al. 2020

Sustainability

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A cogeneration cycle for electric power and refrigeration, using an ammonia-water solution as a working fluid and the geothermal hot water as a heat source, is proposed and investigated. The system is a combination of a modified Kalina cycle (KC) which produces power and an absorption refrigeration cycle (ARC) that generates cooling. Geothermal water is supplied to both the KC boiler and the ARC generator. The system is analyzed from thermodynamic and economic viewpoints, utilizing Engineering Equation Solver (EES) software. In addition, a parametric study is carried out to evaluate the effects of decision parameters on the cycle performance. Furthermore, the system performance is optimized for either maximizing the exergy efficiency (EOD case) or minimizing the total product unit cost (COD case). In the EOD case the exergy efficiency and total product unit cost, respectively, are calculated as 34.7% and 15.8$/GJ. In the COD case the exergy efficiency and total product unit cost are calculated as 29.8% and 15.0$/GJ. In this case, the cooling unit cost, c p , c o o l i n g , and power unit cost, c p , p o w e r , are achieved as 3.9 and 11.1$/GJ. These values are 20.4% and 13.2% less than those obtained when the two products are produced separately by the ARC and KC, respectively. The thermoeconomic analysis identifies the more important components, such as the turbine and absorbers, for modification to improve the cost-effectiveness of the system.

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Section: Introductionmentioning

confidence: 99%

Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Javanshir

Kordlar

et al. 2020

Sustainability

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“…In the results, it was seen that net electrical efficiency is about 8% for designed low‐grade heat sources. Wang et al combined a Kalina cycle and a refrigeration cycle and carried out a thermodynamic analysis. It was revealed that the thermal and exergetic efficiencies could be raised with the application of the combination.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a mercury-steam combined-energy-generation system (MES)

Gonca

Şahi̇n

2019

Int J Energy Res

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Summary In this study, exergy and thermo‐ecology–based performance analyses of a mercury‐steam combined–energy‐generation system are comprehensively presented. Performance characteristics such as net‐power output, net‐power density, exergy efficiency, exergy destruction, and ecological coefficient of performance have been obtained by developing a novel numerical model. The impacts of the pressures of open feed water heater and steam turbines, temperatures of mercury boiler, and mercury turbines on the performance characteristics have been investigated. The results indicated that the performance characteristics of the system have been remarkably affected by the pressure and temperature variations of the system components.

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“…Used plate heat exchangers are mathematically modeled and entropy generation of both components and whole system is calculated. Thermodynamics analysis of a combined cooling and power system using ammonia-water mixture is given in [25]. Mathematical models are established to simulate the combined system under steady-state conditions.…”

Section: Introductionmentioning

confidence: 99%

Energy analysis of heat exchanger in a heat exchanger network

Rauch

Galović

2018

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI171231216R For many years now, heat exchanger optimization has been a field of research for a lot of scientists. Aims of optimization are different, having in mind heat exchanger networks with different temperatures of certain streams. In this paper mathematical model in dimensionless form is developed, describing operation of one heat exchanger in a heat exchanger network, with given overall area, based on the maximum heat-flow rate criterion. Under the presumption of heat exchanger being a part of the heat exchanger network, solution for the given task is resting in a possibility of connecting an additional fluid stream with certain temperature on a certain point of observed heat exchanger area. The connection point of additional fluid stream determines the exchanging areas of both heat exchangers and it needs to allow the maximum exchanged heat-flow rate. This needed heat-flow rate achieves higher value than the heat-flow rate acquired by either of streams. In other words, a criterion for the existence of the maximum heat-flow rate, as a local extremum, is obtained within this mathematical model. Results of the research are presented by the adequate diagrams and are interpreted, with emphasis on the cases which fulfill and those which do not fulfill the given condition for achieving the maximum heat-flow rate.

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Thermodynamic analysis of a new combined cooling and power system using ammonia–water mixture

Cited by 122 publications

References 37 publications

Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Energy and Cost Analysis and Optimization of a Geothermal-Based Cogeneration Cycle Using an Ammonia-Water Solution: Thermodynamic and Thermoeconomic Viewpoints

Performance evaluation of a mercury-steam combined-energy-generation system (MES)

Energy analysis of heat exchanger in a heat exchanger network

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