Power Generation from Low Grade Heat Using Trilateral Flash Cycle

Iqbal, Arbab; Ahmadi, Morteza; Melhem, Farah; Rana, Sohel; Akbarzadeh, Aliakbar; Date, Abhijit

doi:10.1016/j.egypro.2017.03.174

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Trilateral Flash Cycle, TFC is a thermodynamic cycle basically consisting of same components as the Rankine-cycle system but the low boiling point liquid is only heated up at constant pressure to its boiling point (saturated liquid condition) after which it performs a flash expansion through a convergent-divergent (CD) nozzle to deliver power [63]. If the expansion process terminates in the wet region, it is represented in the T-s diagram approximately by a triangle and hence called trilateral cycle.…”

Section: Trilateral Flash Cycle (Tfc)mentioning

confidence: 99%

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Oyedepo

Fakeye

2021

Journal of Thermal Engineering

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The aim of this study was to review the significant of waste heat recovery technologies as means of achieving sustainable energy development. Most developing nations of the World are faced with the enormous release of industrial waste heat of low temperature grade to the environment. Unlike material waste that is clearly visible, waste heat can be difficult to identify and evaluate both in terms of quantity and quality. Hence, understanding the availability of waste heat, and the ability to recover it, offer great opportunity to reduce energy costs and associated environmental impacts. Utilizing low-grade energy from waste heat sources is considered to offer a significant contribution to improving overall energy efficiency in the energy-intensive industrial sectors. The concept of industrial waste heat is explained, potential sources of waste heat from industries are identified, and the technologies available for waste heat recovery are presented in this study. From the review study, it is shown that about 72% of the global primary energy consumption is lost after conversion, while 63% of the considered waste heat streams arise at a temperature below 100 °C in which electricity generation has the largest share followed by transportation and manufacturing industry. The results of this study reveals that considerable amount of waste heat can be technically and economically recovered through sustainable technologies with prospective capacity for the much desired sustainable energy development. Specifically, in-depth utilization of waste heat resources can effectively moderate the rate of depletion of the fossil fuels and sufficiently reduce toxic emissions to within acceptable limits that are compatible to the projected time of full deployment of renewable energy (RE) source.

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Section: Trilateral Flash Cycle (Tfc)mentioning

confidence: 99%

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Oyedepo

Fakeye

2021

Journal of Thermal Engineering

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“…As for the three thermal systems, the power generation performance is primarily determined by the turbine efficiency and inlet flow state. So far, no total flow turbines are commercially available for geothermal application [25], but previous and ongoing research has indicated its promising potential [13,22]. Four average total flow turbine efficiencies (η tave ) have been conservatively set as 20%, 30%, 40%, and 50% for the trilateral flash system (TFS) according to previous investigations in similar applications [26].…”

Section: Simulation Descriptionmentioning

confidence: 99%

“…Later, they proposed two-phase nozzle design and conducted research on total flow expansion devices, targeting low temperature and low vapor quality geothermal water in Australia. By upgrading the expansion device from a two-arm rotor to reaction turbines, the performance of the system has been improved significantly, demonstrating the good potential of the combined power and water generation concept [13].…”

Section: Introductionmentioning

confidence: 99%

Combined Power and Freshwater Generation Driven by Liquid-Dominated Geothermal Sources

2019

Energies

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In order to meet the twin challenges of energy shortage and water scarcity in eastern Africa, this paper looks at the feasibilities of using a geothermal water source to produce both fresh water and electricity. In this research, three geothermally sourced combined power and freshwater generation systems are investigated and compared. Two of them are based on traditional power generation systems, including a steam system (SS) and a single-flash system (SFS). The third one is a trilateral flash system (TFS) with a two-phase turbine, which processes the total geofluid flow from the wellhead directly. The power generation potential as well as the condensation process, which produces desalinized freshwater, are investigated for three systems under two typical liquid-dominated well conditions in the Aluto Langano geothermal field in Ethiopia. Results indicate that, suitable total flow turbine efficiency enables the trilateral flash system to be comparable with the steam system and the single-flash system regarding the power generation, especially when the well flow is more liquid dominated. Moreover, freshwater generation is a distinct advantage of the trilateral flash system, and its freshwater output can reach up to be 2.7 times higher than those of traditional systems, making it a promising solution for combined power and freshwater generation.

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“…31 Undoubtedly, there are some restrictions in their operation with streams contain high amount of salt concentration. 32 For example, the fouling is the build-up of particulates such as mineral salts, colloids, heavy metals, microorganisms, and suspended solids totally on the membrane. So, the membrane technologies are not suitable for sweetening of brackish waste streams.…”

Section: Solar Desalination Pondsmentioning

confidence: 99%

“…The solar pond has been considered as a feasible and efficient process due to nonexpensive material for solar pond construction, simple manufacturing method, and consumption of renewable energy . Undoubtedly, there are some restrictions in their operation with streams contain high amount of salt concentration . For example, the fouling is the build‐up of particulates such as mineral salts, colloids, heavy metals, microorganisms, and suspended solids totally on the membrane.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of collection, thermal, and conductivity efficiency of a solar distiller pond as a free concentration unit in wastewater treatment process

Farahbod

Omidvar

2018

Energy Science & Engineering

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The performance of one solar pond as a passive step in distilled and potable water production from desalination effluent is surveyed in this research. This solar pond is proposed in a zero discharge desalination process to prevent the salinity shocking which is made by a brackish water stream that exists from desalination units. The solar pond performance is evaluated by measuring three types of efficiency, experimentally, and mathematically. The efficiencies which are defined and calculated from experimental data are conductivity efficiency, thermal efficiency, and water recovery efficiency. The mathematical results are verified by experimental data which has been obtained during a year. The theoretical modelings show very good agreement with experimental data, especially for water collection and conductivity efficiency evaluation. The relative error of theoretical and experimental results for thermal efficiency evaluation through the day and night is obtained 7.2% and 4.9%, respectively.

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Power Generation from Low Grade Heat Using Trilateral Flash Cycle

Cited by 14 publications

References 6 publications

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Combined Power and Freshwater Generation Driven by Liquid-Dominated Geothermal Sources

Experimental evaluation of collection, thermal, and conductivity efficiency of a solar distiller pond as a free concentration unit in wastewater treatment process

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