Experimental investigation of the ORC system in a
cogenerative domestic power plant with a scroll
expanders

Kaczmarczyk, Tomasz Z.; Ihnatowicz, Eugeniusz; Żywica, Grzegorz; Kiciński, Jan

doi:10.1515/eng-2015-0026

Cited by 18 publications

(15 citation statements)

References 7 publications

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“…On account of the highest potential for further development, as well as operational aspects, it was decided to apply the oil-free vapour micro-turbine. Machines of this type, in the case of small ORC systems, have several advantages, the most important being [12][13][14][15]37]: high efficiency, no wear parts, hermetic housing and low noise. Small dimensions enable to develop compact structure for the entire device which is essential for the use of ORC system in a domestic environment.…”

Section: Thermodynamic Cycle and Component Selectionmentioning

confidence: 99%

Prototype of the domestic CHP ORC energy system

Kiciński¹,

Żywica²

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The Institute of Fluid-Flow Machinery (IMP PAN) in Gdansk pursues its own research in fields such as technologies that use renewable energy sources efficiently, including in particular the small-scale combined heat and power (CHP) systems. This article discusses the design concepts for the prototype of small CHP ORC (organic Rankine cycle) energy system, developed under the research project. The source of heat is a boiler designed for biomass combustion. Electricity was generated using specially designed oil-free vapour micro-turbine. The turbo-generator has compact structure and hermetical casing thanks to the use of gas bearings lubricated by working medium. All energy system components are controlled and continuously monitored by a coherent automation and control system. The article also discusses selected experimental results conducted under laboratory conditions. Thermal-flow tests were presented that allow for an assessment of the operation of energy system components. Additionally, energy performance results of the turbo-generator were given including power obtained at various cycle parameters. The achieved results have shown that the developed energy system operated in accordance with design solutions. Electricity derived from the energy system prototype was around 2 kW, with boiler's thermal power of 25 kW. The research has also confirmed that this system can be used in a domestic environment.

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Section: Thermodynamic Cycle and Component Selectionmentioning

confidence: 99%

Prototype of the domestic CHP ORC energy system

Kiciński¹,

Żywica²

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Prace nad ekspanderami są prowadzone również w IMP PAN w Gdańsku. Dotychczas przeprowadzone badania wykazały, że najbardziej atrakcyjnym rozwiązaniem w warunkach domowych są ekspandery turbinowe [9,10]. W wykonaniu bezolejowym mikroturbiny parowe są nowoczesnym i bardzo niezawodnym rozwiązaniem.…”

Section: Wprowadzenieunclassified

“…Ze względu na największy potencjał dalszego rozwoju oraz aspekty eksploatacyjne, jako ekspander zdecydowano się zastosować mikroturbinę parową wykonaną w technologii bezolejowej. Maszyny tego typu w przypadku małych układów ORC mają kilka zalet, a najważniejsze z nich to [9][10][11][12]: wysoka sprawność, brak zużywających się części, hermetyczna konstrukcja oraz cichobieżność. Duże znaczenie w przypadku wykorzystania układu ORC w warunkach domowych miały również małe wymiary, co pozwalało na opracowanie zwartej konstrukcji.…”

Section: Obieg Termodynamiczny I Podzespoły Mikrosiłowniunclassified

Design and experimental investigation of the cogenerative domestic micro power plant with ORC system

Żywica¹,

Kiciński²,

Kaczmarczyk³

et al. 2015

Mechanik

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“…ORC systems can also be fed with waste heat coming from industrial processes or combustion engines [5]. For electricity generation in such systems, various types of volumetric and dynamic expanders [6] can be used, such as screw expanders, scroll expanders [7], piston expanders [8], vane expanders [9] or turbine expanders [10]. In micro-power ORC systems, microturbines of different types are increasingly used as expanders [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of dynamic properties of the microturbine with a maximum rotational speed of 120 krpm – predictions and experimental tests

Żywica¹,

Kaczmarczyk²,

Breńkacz³

et al. 2020

J. vibroeng.

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Advances in the development of analysis and design methods for fluid-flow machines have enabled both their multi-criteria optimisation and miniaturisation. To decrease the size of such a machine whilst, at the same time, maintaining its output power level, the rotor's rotational speed needs to be increased. It is the reason for serious difficulties with respect to the rotor dynamics and the selection of a bearing system. This article discusses the simulation analysis and experimental research carried out on a prototypical microturbine, designed for use in a domestic ORC (organic Rankine cycle) cogeneration system. During the design process, the basic assumption was to develop a turbomachine, whose dimensions would have been as small as possible and whose output electric power would have been about 1 kilowatt. A supersonic impulse turbine, with a nominal rotational speed of 100,000 rpm, was used in order to obtain high flow efficiency. The maximum speed of the rotor was determined at a level of 120,000 rpm. The article presents the results of analyses made at the design stage and preliminary results of the experimental research. The numerical simulations covered the bearing system optimisation and the rotor dynamics analysis. Next, based on the outcomes of these analyses, a decision was made to use non-conventional gas bearings which are fed by the low-boiling medium's vapour that comes from the ORC system. Within the framework of the experimental research, the dynamic behaviour of the turbogenerator was examined in terms of the rotational speed and produced energy. The performed measurements are proof of very good dynamic properties of the tested machine and after the research was over it was concluded that there were absolutely no signs of wear of the turbogenerator's subassemblies.

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Experimental investigation of the ORC system in a cogenerative domestic power plant with a scroll expanders

Cited by 18 publications

References 7 publications

Prototype of the domestic CHP ORC energy system

Prototype of the domestic CHP ORC energy system

Design and experimental investigation of the cogenerative domestic micro power plant with ORC system

Investigation of dynamic properties of the microturbine with a maximum rotational speed of 120 krpm – predictions and experimental tests

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