Experimental study of converging-diverging nozzle to generate power by Trilateral Flash Cycle (TFC)

Ahmadi, Morteza; Vahaji, Sara; Iqbal, Arbab; Date, Abhijit; Akbarzadeh, Aliakbar

doi:10.1016/j.applthermaleng.2018.10.116

Cited by 12 publications

(3 citation statements)

References 24 publications

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“…According to the papers of Bianchi et al 27 and Wang et al, 28 a major problem with the TFC is the design and manufacture of a reliable and efficient two‐phase expander, which greatly limits the applications of this technology. To date, only several conceptual TFC systems have been experimentally tested 29 …”

Section: Introductionmentioning

confidence: 99%

“…To date, only several conceptual TFC systems have been experimentally tested. 29 As an improved version of the TFC, the OFC is another well-known low-temperature heat recovery cycle, which has been actively studied for geothermal energy exploitation. Different from the TFC, in the OFC, the saturated liquid at the heater outlet is first flashed into the vapor-liquid two-phase mixture via a throttle valve, and then, the flashed vapor is introduced into a conventional gas expander.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and assessment of a novel organic flash Rankine cycle (OFRC) system for low‐temperature heat recovery

Wang

Macián‐Juan

2022

Energy Science & Engineering

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In this paper, a novel organic flash Rankine cycle (OFRC) system for lowtemperature heat recovery is analyzed and optimized using the 3E (energy, exergy, and economic) analysis method and particle swarm optimization algorithm, respectively. Five environmentally friendly organic fluids and three typical heat source conditions are simultaneously discussed during the parametric analysis and optimization process, to obtain a comprehensive understanding of the thermo-economic characteristics of this novel system.The main analysis results show that the biggest exergy loss of the OFRC system is caused by the condenser, followed by the evaporator. About 70% of the specific power cost is caused by the capital investment of the system, and more than 60% of the capital investment is spent on purchasing the highpressure and low-pressure expanders. Under the same operating conditions, the working fluids with high critical temperatures can achieve higher cycle thermal efficiency and lower specific power costs than those with low critical temperatures. The optimization results show that the OFRC system is able to achieve a better thermodynamic performance than the organic Rankine cycle (ORC) and organic flash cycle (OFC) systems, and when the heat source's inlet temperature is set to 100°C, 120°C, and 140°C, R245fa, R290, and R152a are, respectively, recommended as the best working fluid for the OFRC system.Besides this, it is found that the OFC system has the worst thermo-economic performance, and the ORC system can achieve the lowest specific power cost.A new finding is that, for all three systems, the higher the critical temperature of the working fluid, the lower the specific power cost of the system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and assessment of a novel organic flash Rankine cycle (OFRC) system for low‐temperature heat recovery

Wang

Macián‐Juan

2022

Energy Science & Engineering

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“…Therefore, most commercial turbines are not designed for two-phase conditions. Novel two-phase turbine designs have been investigated for expansion valve replacement [14], geothermal applications [15][16][17], and low-temperature power generation [18,19], but these turbines are not widely implemented or may not be suitable for high-temperature applications. The performance of these machines is also relatively poor, with maximum nozzle isentropic efficiencies of 45% [19], and turbine isentropic efficiencies of 24% [20] being reported.…”

Section: Introductionmentioning

confidence: 99%