Simulation and analysis of the performance map of a micro-ORC-turbine - Comparison with measurements

Streit, Philipp; Popp, Tobias; Weiß, Andreas

doi:10.1063/1.5138634

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…To carry out these analysis and turbine optimizations, appropriate CFD software has to be chosen. For that reason, the software Fine/Turbo by NUMECA [22] which the authors already used for previous investigations [23,24], was used for the simulations. For the rotor stator interface, a full non-matching frozen rotor was used.…”

Section: Cfd Physical Models and Boundary Conditionsmentioning

confidence: 99%

Parameterized, numerical design of a two-wheel Curtis steam turbine for small scale WHR

Streit

Weiß

2021

MATEC Web Conf.

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In contrast to the current trend of converting waste heat into electricity in the small power range below 100 kWel by means of an ORC plant, the authors are pursuing the concept of a micro steam power plant equipped with a micro turbine. Water avoids many of the problems often associated with organic working fluids, such as flammability, toxicity, greenhouse gas effect and high fluid costs. However, water vapor makes turbine design more challenging. The physical reasons for this are repeated, and thereby it becomes clear why a velocity compounded two wheel Curtis turbine has been chosen. The used in-house 1D turbine design tool is briefly introduced. More focus is put on the shortcomings of the implemented 1D loss model and their negative impact on the current turbine design. Consequently, the authors continued actual turbine design by a parameterized approach in 3D CAD/CFD. This approach is explained, and finally, the CFD flow field and the performance maps of the designed turbine are discussed. The turbine is currently under construction and will be installed in 2022 in a waste heat recovery (WHR) plant in Nuremberg/Germany.

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Section: Cfd Physical Models and Boundary Conditionsmentioning

confidence: 99%

Parameterized, numerical design of a two-wheel Curtis steam turbine for small scale WHR

Streit

Weiß

2021

MATEC Web Conf.

Self Cite

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Influence of operational parameters on the performance of Tesla turbines: Experimental investigation of a small-scale turbine

Thomazoni

Ermel

Schneider

et al. 2022

Energy

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CuRAX – a new concept of a velocity-compounded radial micro-turbine for waste heat recovery

Weiß,

Stümpfl,

Streit

2023

MATEC Web Conf.

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The paper introduces and discusses the new concept of a velocity-compounded, radial entry axial outlet Curtis turbine – called CuRAX. First, the motivation for the new turbine concept is discussed and the consideration which led to the CuRAX architecture is introduced. A 5 kWel air CuRAX turbine demonstrator was designed, following the in-house design procedure, and numerically and experimentally verified. The flow field shows the expected pressure and velocity distribution of a velocitycompounded turbine. However, potential for improvements is also obvious. The experimental results show the superiority of the CuRAX turbine at its design speed of 29,000 rpm with 50% total-to-static isentropic efficiency compared to 46 % of the quasi-impulse cantilever turbine – its direct competitor.

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Simulation and analysis of the performance map of a micro-ORC-turbine - Comparison with measurements

Cited by 3 publications

References 3 publications

Parameterized, numerical design of a two-wheel Curtis steam turbine for small scale WHR

Parameterized, numerical design of a two-wheel Curtis steam turbine for small scale WHR

Influence of operational parameters on the performance of Tesla turbines: Experimental investigation of a small-scale turbine

CuRAX – a new concept of a velocity-compounded radial micro-turbine for waste heat recovery

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