The New Concept of Capillary Forces Aided Evaporator for Application in Domestic Orc

Mikielewicz, Dariusz; Szymański, Paweł; Błauciak, Krzysztof; Wajs, Jan; Mikielewicz, Jarosław; Ihnatowicz, Eugeniusz

doi:10.1615/heatpipescietech.2012004240

Cited by 3 publications

(4 citation statements)

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“…Some attempt to use commercially available porous structures such as, for example, stainless steel sintered porous structures. Hence, this research is a continuation of the work carried on by Mikielewicz et al [18][19][20] and presents the feasibility of manufacturing economical LHPs with sintered stainless steel powder by Tridelta Siperm GmbH (Dortmund, Germany) [21] as a wick material and its influence on LHPs thermal performance.…”

Section: Introductionmentioning

confidence: 91%

The Influence of Loop Heat Pipe Evaporator Porous Structure Parameters and Charge on Its Effectiveness for Ethanol and Water as Working Fluids

2021

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This paper presents the results of experiments carried out on a specially designed experimental rig designed for the study of capillary pressure generated in the Loop Heat Pipe (LHP) evaporator. The commercially available porous structure made of sintered stainless steel constitutes the wick. Three different geometries of the porous wicks were tested, featuring the pore radius of 1, 3 and 7 µm. Ethanol and water as two different working fluids were tested at three different evaporator temperatures and three different installation charges. The paper firstly presents distributions of generated pressure in the LHP, indicating that the capillary pressure difference is generated in the porous structure. When installing with a wick that has a pore size of 1 μm and water as a working fluid, the pressure difference can reach up to 2.5 kPa at the installation charge of 65 mL. When installing with a wick that has a pore size of 1 μm and ethanol as a working fluid, the pressure difference can reach up to 2.1 kPa at the installation charge of 65 mL. The integral characteristics of the LHP were developed, namely, the mass flow rate vs. applied heat flux for both fluids. The results show that water offers larger pressure differences for developing the capillary pressure effect in the installation in comparison to ethanol. Additionally, this research presents the feasibility of manufacturing inexpensive LHPs with filter medium as a wick material and its influence on the LHP’s thermal performance.

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Section: Introductionmentioning

confidence: 91%

The Influence of Loop Heat Pipe Evaporator Porous Structure Parameters and Charge on Its Effectiveness for Ethanol and Water as Working Fluids

2021

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“…Schemat obiegu mikrosiłowni z kotłem na biomasę (B -kocioł, P -pompa, Tturbina, G -generator, E -parownik, R -regenerator, C -skraplacz) Wymienione podzespoły pomyślnie przeszły badania eksperymentalne z czynnikiem roboczym. W trakcie prac nad każdym podzespołem w IMP PAN powstało kilka innowacyjnych, alternatywnych rozwiązań kotłów [13], pomp obiegowych [14], wymienników ciepła [15] oraz mikroturbin parowych [10,16,17]. Podczas wyboru podzespołów ważnym kryterium oprócz założonej mocy i wydajności była wysoka trwałość i pewność działania, a także możliwie niska cena.…”

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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“…The prototypes of axial-flow and radial-flow micro turbines were designed, developed and successfully tested. The results of these surveys were presented in a number of books [3][4][5][6][7][8] and papers [9][10][11][12][13][14][15][16][17][18]. However, despite the successful experimental investigations, currently there are no commercially viable ORC-dedicated micro turbines yet available.…”

Section: Introductionmentioning

confidence: 99%

“…Variation of the curves is known from typical volumetric expanders except the strange recompression effect which is visible in the vicinity of φ = 200 • . This behavior stems from the improper construction of the expander and it was described in detail in [3]. This effect is more visible for working fluids with a higher saturation pressure and it results in decrease of efficiency of the expander.…”

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confidence: 99%

Influence of the Applied Working Fluid and the Arrangement of the Steering Edges on Multi-Vane Expander Performance in Micro ORC System

2018

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Micro-power domestic organic Rankine cycle (ORC) systems are nowadays of great interest. These systems are considered for combined heat and power (CHP) generation in domestic and distributed applications. The main issues of ORC systems design is selection of the expander and the working fluid. Thanks to their positive features, multi-vane expanders are especially promising for application in micro-power ORC systems. These expanders are very simple in design, small in dimensions, inexpensive and feature low gas flow capacity and expansion ratio. The application of multi-vane expanders in ORC systems is innovative and currently limited to prototype applications. However, a literature review indicates the growing interest in these machines and the potential for practical implementation. For this reason, it is necessary to conduct detailed studies on the multi-vane expanders operation in ORC systems. In this paper the results of experimental and numerical investigations on the influence of the applied working fluid and the arrangement of the steering edges on multi-vane expander performance in micro ORC system are reported. The experiments were performed using the specially designed lab test-stand, i.e. the domestic ORC system. Numerical simulations were proceeded in ANSYS CFX software (ANSYS, Inc., Canonsburg, PA, USA) and were focused on determining the expander performance under various flow conditions of different working fluids. Detailed numerical analysis of the arrangement of the machine steering edges showed existence of optimal mutual position of the inlet and outlet port for which the multi-vane expander achieves maximum internal work and internal efficiency.

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The New Concept of Capillary Forces Aided Evaporator for Application in Domestic Orc

Cited by 3 publications

References 0 publications

The Influence of Loop Heat Pipe Evaporator Porous Structure Parameters and Charge on Its Effectiveness for Ethanol and Water as Working Fluids

The Influence of Loop Heat Pipe Evaporator Porous Structure Parameters and Charge on Its Effectiveness for Ethanol and Water as Working Fluids

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

Influence of the Applied Working Fluid and the Arrangement of the Steering Edges on Multi-Vane Expander Performance in Micro ORC System

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