Development of a 200 kW ORC radial turbine for waste heat recovery

Han, Sang Eon; Seo, Jong-Beom; Choi, Bum-Seog

doi:10.1007/s12206-014-1147-6

Cited by 28 publications

(20 citation statements)

References 11 publications

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“…Our numerical model was designed by Han et al [10]. The turbine one-dimensional preliminary design was realized using the meridional design method following what was published by Moustapha et al [11].…”

Section: Numerical Investigationmentioning

confidence: 99%

“…The details of the adoption of the two-stage configuration are mentioned in Ref. [10]. The three-dimensional blades layout and mesh generation were created using a commercial CFD tool, and the flow simulation inside the turbine was conducted using an implemented finite volume technique to solve 3D Reynolds averaged NavierStokes transport equations in their conservation form, and taking into consideration the SST turbulence model.…”

Section: Numerical Investigationmentioning

confidence: 99%

“…The nondimensional wall distance y + was checked for different values ( y £ + 10) and found to have no significant effects on the results since the objective of the present work is a quantitate aerodynamic evaluation and not a qualitative one. The working fluid R245fa operates nearly in the so-called dense-gas region, as was mentioned before; in the original design [10] the thermodynamic properties were evaluated using the PengRobinson-Stryjek-Vera (PRSV) cubic equation of state model, which is supposed to be physically accurate and numerically efficient. We performed this study using sensitive to initial guess boundary conditions, which are the total pressure at the inlet and static pressure at the outlet, as Table 3 shows.…”

Section: Numerical Investigationmentioning

confidence: 99%

“…Later, Cho et al [9] designed a small-scale radial-type turbine with a supersonic nozzle for the purpose of regulating the mass flow rate for varying thermal energies. In 2014, Han et al [10] reported the development of a 200 kW ORC two-stage radial turbine for waste heat recovery. In this later work two prototypes of the turbine were designed by the Heat Transfer Laboratory (HTLAB) of Seoul National University of Science and Technology, and experimentally tested by Korea Institute of Machinery and Materials (KIMM).…”

Section: Introductionmentioning

confidence: 99%

“…The first prototype was published in Ref. [10], and the second prototype is the subject of the current paper. We present an investigative extension of the turbine by drawing both numerical and experimental offdesign performance maps for the purpose of validating and improving the prediction of the turbine performance parameters.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of an Organic Rankine cycle radial inflow two-stage turbine

2017

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The Organic Rankine cycle power plants have recently been the subject of intensive and remarkable growth in research worldwide. The system operates using very impressive technology to convert low to moderate heat sources into useful electrical power by means of a turbine. It offers the advantages of better operating performance, less crowded components compared to the classical steam and gas power plants for low power ranges, and more importantly, no greenhouse gas effects on the atmosphere. Numerical investigations of the turbine play a major role in improving the performance of the system, and an accurate CFD simulation interfaced with accurate thermodynamic models is considered a significant step in the design and prediction of the turbine performance. This paper draws both numerical and experimental performance maps of an ORC radial inflow two-stage turbine, starting with experimental data collection and refinement, passing by the performance parameters calculation. A commercial CFD tool was used to study the grid-independency of the numerical performance maps; a medium and fine mesh were generated and checked against the experiments. The look-up-tables interpolation method was implemented in this study to evaluate the working fluid thermodynamic properties. The main objective of this work is the validation and improvement of the numerical model prediction with respect to the experimental results.

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Section: Numerical Investigationmentioning

confidence: 99%

Section: Numerical Investigationmentioning

confidence: 99%

Section: Numerical Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of an Organic Rankine cycle radial inflow two-stage turbine

2017

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Comparative analysis of nanofluid‐based Organic Rankine Cycle through thermoeconomic optimization

Prajapati

Patel

2019

Heat Trans. Asian Res.

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The present work focused on the comparative analysis of organic Rankine cycle (ORC) operated with nanoparticles. The effect of CuO and Al2O 3 nanoparticles synthesized with water and circulated within heat exchangers are examined. Thermal efficiency and levelized energy cost (LEC) of the nanofluid based ORC are evaluated simultaneously in the present work. The optimization problem of ORC is formed and solved using heat transfer search algorithm. Operating parameters of the nanofluid based ORC such as pinch point temperature difference of heat exchangers, evaporation pressure, the mass flow rate of refrigerant, and concentration of nanoparticles are investigated in the optimization study. Further, the effect of turbine ratio, heat source temperature, and mass flow rate of heat source fluid on CuO and Al 2O 3 based ORC is explored and discussed. It was observed that a total variation of 35.2% was obtained at the cost of 3.5% variation in LEC between extreme design points. The maximum thermal efficiency of 19.3% and 19.32% can be obtained with CuO and Al 2O 3 with 2.616 and 2.62 $/kWh, respectively. Comparative results reveal that CuO based ORC shows dominance in terms of economic performance over Al 2O 3 based ORC for any given value of the thermal efficiency.

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Mathematical modeling of torque for single screw expanders

Zhi

Wang

et al. 2017

J Mech Sci Technol

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Development of a 200 kW ORC radial turbine for waste heat recovery

Cited by 28 publications

References 11 publications

Numerical investigation of an Organic Rankine cycle radial inflow two-stage turbine

Numerical investigation of an Organic Rankine cycle radial inflow two-stage turbine

Comparative analysis of nanofluid‐based Organic Rankine Cycle through thermoeconomic optimization

Mathematical modeling of torque for single screw expanders

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