Selection of optimum degree of partial admission in a laboratory organic vapour microturbine

Klonowicz, Piotr; Witanowski, Łukasz; Suchocki, Tomasz; Jędrzejewski, Łukasz; Lampart, Piotr

doi:10.1016/j.enconman.2019.112189

Cited by 19 publications

(7 citation statements)

References 32 publications

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“…Velocity is high due to conditions at the last stage with extremely long blades (1.8 m). It is easier to achieve slower fluid velocity in smaller turbines; however, fluid velocity can reach 370 m/s even in small turbines, a value close to the speed of sound in conditions at the outlet of the turbine [140][141][142].…”

Section: Results Of Thermodynamic Analysismentioning

confidence: 99%

Compact High Efficiency and Zero-Emission Gas-Fired Power Plant with Oxy-Combustion and Carbon Capture

et al. 2022

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Reduction of greenhouse gases emissions is a key challenge for the power generation industry, requiring the implementation of new designs and methods of electricity generation. This article presents a design solution for a novel thermodynamic cycle with two new devices—namely, a wet combustion chamber and a spray-ejector condenser. In the proposed cycle, high temperature occurs in the combustion chamber because of fuel combustion by pure oxygen. As a consequence of the chemical reaction and open water cooling, a mixture of H2O and CO2 is produced. The resulting working medium expands in one turbine that combines the advantages of gas turbines (high turbine inlet temperatures) and steam turbines (full expansion to vacuum). Moreover, the main purpose of the spray-ejector condenser is the simultaneous condensation of water vapour and compression of CO2 from condensing pressure to about 1 bar. The efficiency of the proposed cycle has been estimated at 37.78%. COM-GAS software has been used for computational flow mechanics simulations. The calculation considers the drop in efficiency due to air separation unit, carbon capture, and spray-ejector condenser processes. The advantage of the proposed cycle is its compactness that can be achieved by replacing the largest equipment in the steam unit. The authors make reference to a steam generator, a conventional steam condenser, and the steam-gas turbine. Instead of classical heat exchanger equipment, the authors propose non-standard devices, such as a wet combustion chamber and spray-ejector condenser.

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Section: Results Of Thermodynamic Analysismentioning

confidence: 99%

Compact High Efficiency and Zero-Emission Gas-Fired Power Plant with Oxy-Combustion and Carbon Capture

et al. 2022

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“…In such cases, optimisations can be carried out simultaneously in several variants, taking into account economic aspects such as a cheaper and faster manufacturing process. An example of a very complex geometry is the rotor disc optimisation described in [ 37 , 47 ]. Geometry optimisation based on conventional methods can be very difficult, time-consuming and expensive (c) or even impossible (d).…”

Section: Discussionmentioning

confidence: 99%

“… Examples of geometry optimisations carried out on fluid-flow machines: ( a ) optimisation of the geometry of the blades of a gas microturbine [ 45 ]; ( b ) optimisation of the rotor of an air-breathing radial outflow turbine [ 46 ]; ( c ) optimisation of the guide vanes of an ORC microturbine [ 47 ]; ( d ) optimisation of the disc of a radial-axial turbine [ 37 ]. …”

Section: Figurementioning

confidence: 99%

Additively Manufactured Parts Made of a Polymer Material Used for the Experimental Verification of a Component of a High-Speed Machine with an Optimised Geometry—Preliminary Research

2020

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This paper describes a novel method for the experimental validation of numerically optimised turbomachinery components. In the field of additive manufacturing, numerical models still need to be improved, especially with the experimental data. The paper presents the operational characteristics of a compressor wheel, measured during experimental research. The validation process included conducting a computational flow analysis and experimental tests of two compressor wheels: The aluminium wheel and the 3D printed wheel (made of a polymer material). The chosen manufacturing technology and the results obtained made it possible to determine the speed range in which the operation of the tested machine is stable. In addition, dynamic destructive tests were performed on the polymer disc and their results were compared with the results of the strength analysis. The tests were carried out at high rotational speeds (up to 120,000 rpm). The results of the research described above have proven the utility of this technology in the research and development of high-speed turbomachines operating at speeds up to 90,000 rpm. The research results obtained show that the technology used is suitable for multi-variant optimization of the tested machine part. This work has also contributed to the further development of numerical models.

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“…In small turbines for power output < 100 kWel, the rotational speed is in the magnitude of several 10 4 rpm [5,[7][8][9]. This fact makes bearing design and generator design challenging.…”

Section: Introductionmentioning

confidence: 99%

“…The small mass flow rate is concentrated on a section of the rotor wheel. Thereby, too small blade heights can be avoided [8,14].…”

Section: Introductionmentioning

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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Selection of optimum degree of partial admission in a laboratory organic vapour microturbine

Cited by 19 publications

References 32 publications

Compact High Efficiency and Zero-Emission Gas-Fired Power Plant with Oxy-Combustion and Carbon Capture

Compact High Efficiency and Zero-Emission Gas-Fired Power Plant with Oxy-Combustion and Carbon Capture

Additively Manufactured Parts Made of a Polymer Material Used for the Experimental Verification of a Component of a High-Speed Machine with an Optimised Geometry—Preliminary Research

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

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