Thermoeconomic comparison between the organic flash cycle and the novel organic Rankine flash cycle (ORFC)

Campos, Gustavo Bonolo de; Bringhenti, Cleverson; Traverso, Alberto; Tomita, Jesuíno Takachi

doi:10.1016/j.enconman.2020.112926

Cited by 30 publications

(3 citation statements)

References 37 publications

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“…On the other side, the adoption in the HPs cycles of refrigerants with low environmental impact, is becoming mandatory: the so-called "natural refrigerants" characterized by very low global warming potential (GWP) and null Ozone Depletion Potential, ODP are more often adopted in the new installations * Corresponding author: alessandro.sorce@unige.it instead of HFCs and have found a new application within the Organic Rankine Cycle [4].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Power-to-Heat Systems

et al. 2021

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The heating and cooling sector, responsible for a large fraction of greenhouse emissions, may have a large scale impact on the energy system evolution contributing to smart industrial and domestic electrification; at the same time the recent increase of renewable energy sources installation, posing a threat in terms of grid stability, makes available a considerable amount of clean and cheap electrical energy during peak hours production. Power to heat technologies constitute a promising solution to face both these issues reducing the electric demand variability and decarbonizing the heat production. Large vapor compression heat pumps are a reliable technology able to compete, under the economic point of view, with the heat-only-boilers in order to serve district heating networks. Performance and economic profitability of a compression cycle is strongly dependent on available thermal source and the temperature of water delivered to the network. The present work explores and compares performance and economic indicators under different installation conditions, considering compression heat pumps employing four different fluids: a traditional HCF (R134a) and three natural fluids, ammonia (R717), butane (R600), and propane (R290), often preferred nowadays to HCFs due to the lower global warming potential.

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Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Power-to-Heat Systems

et al. 2021

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“…An organic Rankine flash cycle (ORFC) integrates the trilateral cycle with the ORC. De Campos et al [52] compared the ORFC with the OFC, demonstrating that the greatest exergy efficiency is attained for the ORFC at lower volume flow ratio of the two-phase expansion than the OFC. Moreover, the exergy and energy efficiencies of the ORFC were higher than those of the OFC when utilizing pentane as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

Proposal and Comprehensive Analysis of a Novel Combined Plant with Gas Turbine and Organic Flash Cycles: An Application of Multi-Objective Optimization

Ghiami Sardroud,

Javaherian,

Seyed Mahmoudi

et al. 2023

Sustainability

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Environmental, exergo-economic, and thermodynamic viewpoints are thoroughly investigated for a state-of-the-art hybrid gas turbine system and organic flash cycle. For the proposed system, the organic flash cycle utilizes the waste thermal energy of the gases exiting the gas turbine sub-system to generate additional electrical power. Six distinct working fluids are considered for the organic flash cycle: R245fa, n-nonane, n-octane, n-heptane, n-hexane, and n-pentane. A parametric investigation is applied on the proposed combined system to evaluate the impacts of seven decision parameters on the following key operational variables: levelized total emission, total cost rate, and exergy efficiency. Also, a multi-objective optimization is performed on the proposed system, taking into account the mentioned three performance parameters to determine optimum operational conditions. The results of the multi-objective optimization of the system indicate that the levelized total emission, total cost rate, and exergy efficiency are 74,569 kg/kW, 6873 $/h, and 55%, respectively. These results also indicate the improvements of 16.45%, 6.59%, and 3% from the environmental, economic, and exergy viewpoints, respectively. The findings reveal that utilizing n-nonane as the working fluid in the organic flash cycle can yield the lowest levelized total emission, the lowest total cost rate, and the highest exergy efficiency.

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“…The vapor phase is expanded to drive the shaft and generator, while the liquid phase enters the throttle valve without being used. Recently, a study [36] reported that flash (liquid phase) by replacing the throttle valve with a two-phase expander. Therefore, the cycle could generate more output power and increase the efficiency of the system.…”

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confidence: 99%

Design, Integration, and Control of Organic Rankine Cycles with Thermal Energy Storage and Two-Phase Expansion System Utilizing Intermittent and Fluctuating Heat Sources—A Review

et al. 2023

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In order to lessen reliance on fossil fuels, a rise in interest in the utilization of fluctuating and intermittent heat sources derived from renewable energy (such as solar thermal, ocean thermal, and geothermal) and waste heat has been observed. These heat sources could be used to generate electricity at relatively low and medium temperatures, for example, through the organic Rankine cycle (ORC). In some case studies, various approaches have been developed to deal with and design ORCs in the desired operating condition utilizing suitable working fluids. This article aims to review some designs and integrated systems of ORC with thermal energy storage (TES) and a two-phase expansion system focusing on the utilization of medium- and low-temperature heat sources in which some subcritical ORCs are presented. Moreover, several possible control systems (both conventional and advanced ones) of ORC with TES and a two-phase expansion system are reported and compared. At the end of this article, the possible future developments of design and control systems are discussed to describe advanced ORC for utilizing low-grade heat sources. This study aims to provide researchers and engineers with an insight into the challenges involved in this process, making industrialization of ORC technology more extensive, in particular when combined with TES and a two-phase expansion system.

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Thermoeconomic comparison between the organic flash cycle and the novel organic Rankine flash cycle (ORFC)

Cited by 30 publications

References 37 publications

Techno-Economic Analysis of Power-to-Heat Systems

Techno-Economic Analysis of Power-to-Heat Systems

Proposal and Comprehensive Analysis of a Novel Combined Plant with Gas Turbine and Organic Flash Cycles: An Application of Multi-Objective Optimization

Design, Integration, and Control of Organic Rankine Cycles with Thermal Energy Storage and Two-Phase Expansion System Utilizing Intermittent and Fluctuating Heat Sources—A Review

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