Thermodynamic analysis of a novel combined power and refrigeration cycle comprising of EKalina and ejector refrigeration cycles

Behnam, Pooria; Faegh, Meysam; Shafii, Mohammad Behshad

doi:10.1016/j.ijrefrig.2019.06.002

Cited by 28 publications

(4 citation statements)

References 35 publications

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“…• The flow passing through the expansion valve experiences an isenthalpic process. • The ammonia-water leaving the evaporative condenser is saturated liquid [16]. • The pump and turbine both have an isenthalpic efficiency of 0.85 [17].…”

Section: System Description and Assumptionmentioning

confidence: 99%

“…This highlights the need for better designing of the evaporative condenser, which can lead to enhanced exergetic performance of the cycle. It is worth mentioning that the condenser in previous combined ammonia-water cycles also had the highest share of exergy destruction [16,38]. The effects of varying the turbine inlet pressure on energy efficiency, exergy efficiency, and total cost rate are shown in Figure 5.…”

Section: Parametric Analysismentioning

confidence: 99%

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Thermoeconomic analysis and multi-objective optimization of a novel trigeneration system consisting of kalina and humidification- dehumidification desalination cycles

Behnam

Faegh

Fakhari

et al. 2022

Journal of Thermal Engineering

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HIGHLIGHTS• A novel trigeneration cycle comprised of humidification-dehumidification (HDH) and Kalina cycle is proposed. • The evaporative condenser acts as a humidifier and condenser simultaneously.• The complexity of the Kalina-HDH cycle is reduced using the evaporative condenser. • A detailed thermoeconomic analysis and multi-objective optimization are performed. • The optimized exergy efficiency and total cost rate vary between 14.9-41.6% and 1.

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Section: System Description and Assumptionmentioning

confidence: 99%

Section: Parametric Analysismentioning

confidence: 99%

Thermoeconomic analysis and multi-objective optimization of a novel trigeneration system consisting of kalina and humidification- dehumidification desalination cycles

Behnam

Faegh

Fakhari

et al. 2022

Journal of Thermal Engineering

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“…The highest exergy efficiency was attained with R152a, reporting a value of 32%. Behnam et al 71 presented another configuration of a Kalina cycle and an ECC. In this configuration, a second ejector was included at the exit of the turbine, and a flow division was made at the entrance of the first ejector.…”

Section: Hybrid Systems Integrated By Two Cyclesmentioning

confidence: 99%

Thermodynamic cycles for the simultaneous production of power and cooling: A comprehensive review

Pacheco‐Reyes

Rivera

2021

Int J Energy Res

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Summary A comprehensive review of thermodynamic cycles for the simultaneous production of power and cooling is presented. The study not only actualizes the bibliographic reviews previously realized by other authors regarding cycles such as Kalina, Goswami, or modifications of them. This review additionally includes an overview of hybrid cycles and other novel cycles reported in the literature. The hybrid cycles included in the study are systems integrated by two or three conventional cycles, mainly composed of Brayton, Rankine, and ORC for power generation; and compression, absorption, and ejector cycles for cooling production. The other novel cycles mentioned are thermodynamic cycles, which considerably differ from all the others. By using internal rectification, the Goswami cycle increased its efficiency by about 5%; however, by adding diverse components, as a condenser and a subcooler, the efficiency was significantly improved due to the considerable increase of the cooling production. Organic Rankine cycles integrating absorption refrigeration cycles are, in general, the most efficient hybrid cycles, reaching thermal efficiencies close to 40% for the simultaneous production of power and cooling. If a third output was provided, as heating or water distillation, the energy efficiencies were as high as 90%. The main problem with these systems is that, in general, they are too complex and costly because of the considerable number of components. The highest exergy destruction values are reported in solar collectors when used, followed by boilers or generators, and absorbers. The lower production costs were reported with systems integrating a Brayton cycle, an organic Rankine cycle, and an ejector‐cooling cycle. The disadvantage of these systems is that they need high operating temperatures.

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“…In another work, an ejector 1D unsteady model was presented, and a theoretical analysis was carried out to estimate the system performance with different refrigerants [29]. A combined ECC with the Kalina cycle for cooling and power generation was investigated and analyzed [30,31]. Exergy and exergoeconomic analysis have been largely applied for evaluating and optimizing various energy conversion processes.…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimization of a Solar Combined Power Generation and Multi-Cooling System Using CO2 as a Refrigerant

et al. 2023

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This paper proposes a new combined multi-cooling and power generation system (CMCP) driven by solar energy. Carbon dioxide is used as a refrigerant. A parabolic trough collector (PTC) is employed to collect solar radiation and convert it into thermal energy. The system includes a supercritical CO2 power system for power production and an ejector refrigeration system with two ejectors to provide cooling at two different evaporating temperatures. The CMCP system is simulated hourly with weather conditions for Tunisia. The PTC mathematical model is used to calculate the heat transfer fluid outlet temperature and the performance of the CMCP system on a specific day of the year. A 1D model of an ejector with a constant area is adopted to evaluate the ejector performance. The system’s performance is evaluated by an energetic and exergetic analysis. The importance of the system’s components is determined by an exergoeconomic analysis. The system is modeled using MATLAB software. A genetic algorithm is used for multi-objective optimization to determine the best values and solutions for the system’s design parameters. The optimal energy and exergy efficiencies were found to be 13.7 percent and 37.55 percent, respectively, and the total product unit cost was 31.15 USD/GJ.

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Thermodynamic analysis of a novel combined power and refrigeration cycle comprising of EKalina and ejector refrigeration cycles

Cited by 28 publications

References 35 publications

Thermoeconomic analysis and multi-objective optimization of a novel trigeneration system consisting of kalina and humidification- dehumidification desalination cycles

Thermoeconomic analysis and multi-objective optimization of a novel trigeneration system consisting of kalina and humidification- dehumidification desalination cycles

Thermodynamic cycles for the simultaneous production of power and cooling: A comprehensive review

Multi-Objective Optimization of a Solar Combined Power Generation and Multi-Cooling System Using CO2 as a Refrigerant

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