Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system

Kolasiński, Piotr; Błasiak, Przemysław; Rak, Józef

doi:10.1016/j.egypro.2017.09.201

Cited by 20 publications

(8 citation statements)

References 3 publications

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“…Then, the experimentally obtained data sets were applied as the input data to the comprehensive numerical analyses on the thermodynamic and flow processes inside the working chambers of the multi-vane expanders. The simulation results were presented in [66][67][68]. The modeling results showed that in the case of the tested expander, the steering angles were wrongly selected, which results in the recompression of the working fluid in the final stage of the rotor revolution just before the evacuation of the gas from the working chamber to the outlet port.…”

Section: Wrocław University Of Technology (Poland)mentioning

confidence: 99%

“…What is more, the modeling results identified a leakage between the inlet and the outlet ports, which significantly limited the efficiency of the expander. Then, the authors applied the numerical model developed in [66,67] for an optimization analysis of the expander; the results were presented in [68]. The main aim of these analyses was finding the optimal angle of the expanders' outlet port in order to minimize or eliminate the effect of the recompression of the working fluid and thus increase the expanders' efficiency.…”

Section: Wrocław University Of Technology (Poland)mentioning

confidence: 99%

“…The experimental results showed promising values regarding the pumps' volumetric efficiency. Multi-vane pumps were also applied in other ORC systems see, e.g., [56,59,62,64,[66][67][68]. Ref [75] presented the results of numerical modeling a multi-vane expander applied in the ORC system.…”

Section: University Of L'aquila (Italy) Brunel University London (Enmentioning

confidence: 99%

“…In some of the papers assessed, see e.g., [56,59,62,64,[66][67][68][92][93][94], research results related to the application of the multi-vane pumps in ORC systems are reported. The works on their application should also be further explored.…”

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confidence: 99%

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Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Kolasiński

2019

Energies

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This paper reviews the applications of the multi-vane expanders in ORC (organic Rankine cycle) systems. The operating principle and design of the ORC systems are addressed in the introduction. Then, there is a brief review of the expanders applied in small-power and micro-power ORCs, and a discussion of the multi-vane expander design and operating principle as an introduction to a comprehensive review on the applications of the multi-vane expanders in ORC systems. The different features of the multi-vane expanders—i.e., the design of the expander, its geometrical dimensions and operating conditions, durability, applied working fluid, obtained power output, and efficiency—are analyzed in this paper. This review clearly indicates that multi-vane expanders are a promising alternative to the different types of the expanders applied in ORC systems.

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Section: Wrocław University Of Technology (Poland)mentioning

confidence: 99%

Section: Wrocław University Of Technology (Poland)mentioning

confidence: 99%

Section: University Of L'aquila (Italy) Brunel University London (Enmentioning

confidence: 99%

mentioning

confidence: 99%

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Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Kolasiński

2019

Energies

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“…This feature makes vane machines suitable to deal with two-phase workings fluids [3,4]. Moreover, they require little maintenance and lubrication [1] and they can be hermetically sealed [5]. Their simple geometrical structure and small number of moving parts further impact the competitive advantage of this technology in terms of lower capital and operational costs.…”

Section: Introductionmentioning

confidence: 99%

Numerical CFD Simulations and Indicated Pressure Measurements on a Sliding Vane Expander for Heat to Power Conversion Applications

Bianchi

Rane

Fatigati

et al. 2019

Designs

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The paper presents an extensive investigation of a small-scale sliding vane rotary expander operating with R245fa. The key novelty is in an innovative operating layout, which considers a secondary inlet downstream of the conventional inlet port. The additional intake supercharges the expander by increasing the mass of the working fluid in the working chamber during the expansion process; this makes it possible to harvest a greater power output within the same machine. The concept of supercharging is assessed in this paper through numerical computational fluid dynamics (CFD) simulations which are validated against experimental data, including the mass flow rate and indicated pressure measurements. When operating at 1516 rpm and between pressures of 5.4 bar at the inlet and 3.2 bar at the outlet, the supercharged expander provided a power output of 325 W. The specific power output was equal to 3.25 kW/(kg/s) with a mechanical efficiency of 63.1%. The comparison between internal pressure traces obtained by simulation and experimentally is very good. However, the numerical model is not able to account fully for the overfilling of the machine. A comparison between a standard and a supercharged configuration obtained by CFD simulation shows that the specific indicated power increases from 3.41 kW/(kg/s) to 8.30 kW/(kg/s). This large power difference is the result of preventing overexpansion by supercharging. Hence, despite the greater pumping power required for the increased flow through the secondary inlet, a supercharged expander would be the preferred option for applications where the weight of the components is the key issue, for example, in transport applications.

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Experimental study of a small scale organic Rankine cycle waste heat recovery system for a heavy duty diesel engine with focus on the radial inflow turbine expander performance

Alshammari

Pesyridis

Karvountzis-Kontakiotis

et al. 2018

Applied Energy

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Experimental investigation on multi-vane expander operating conditions in domestic CHP ORC system

Cited by 20 publications

References 3 publications

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Numerical CFD Simulations and Indicated Pressure Measurements on a Sliding Vane Expander for Heat to Power Conversion Applications

Experimental study of a small scale organic Rankine cycle waste heat recovery system for a heavy duty diesel engine with focus on the radial inflow turbine expander performance

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