Mathematical Modelling of Heat Transfer in Open Cell Foam of Different Porosities

High competition and strict requirements of the wholesale electricity and capacity market make optimization of heat supply schemes an urgent issue for generating companies. Replacement of life-expired generation equipment with new capacities based on advanced technologies is a priority goal for the energy industry development. This work focuses on condensing power plant (CPP), which is the only source in the city that supplies heat to all consumer categories. The plant carries out quantitative and qualitative heat supply regulation according to the temperature profile of 135/70°C with a cutoff of 110/70°C. The study examines the possibility of CPP modernization based on three options: building a pressure-reducing cooling unit 140/12, commissioning an auxiliary boiler house, and building a 110 MW combined-cycle gas plant. This paper presents technical solutions for the considered options and preliminary technical and economic calculations of their efficiency.

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“…Thus, the commissioning of ABH will allow removing no more than one power unit from the "forced" operation in the heating period [16,17].…”

Section: B Commissioning Of Abhmentioning

confidence: 99%

Options for Modernization of Heat Supply to Consumers of Condensing Power Plant

Balzamov

Akhmetova

Balzamova

2021

Energy Systems Research

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“…A lot of works have been devoted to the study of the effect of metal foam on heat transfer. In [3], the filling of the channels of a two-pipe counterflow heat exchanger with a porous medium was studied. The research results showed that filling the channels with a porous material significantly increased the energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Soloveva

Соловьев

Шакурова

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In this work, we carried out the experimental studies of the pressure drop in porous structures created on the basis of Kelvin cells. The cross sections of the struts of porous structures had the following geometries: circle, triangle, and spinner. The equivalent diameter of the struts was 5, 10, 15, and 20% of 3 mm, where 3 mm is the length of the edge of the cube into which the cell is inscribed. At the same time, several models of porous structures had narrowing in the struts. Experimental studies were carried out at the following air flow velocities: 0.25; 0.5; 0.75; 1 and 1.25 m/s. The research results showed that with an equivalent strut diameter of 5, 10, and 15% of the length of the edge of the cube in which the cell is inscribed, the largest pressure drop at all studied air flow velocities is observed in porous structures with a circular cross section of the struts, without narrowing. With an equivalent strut diameter of 10, 15, 20% of the length of the cube edge, the smallest pressure drop is shown by cells with a circular cross section of the struts, with a narrowing. With an equivalent strut diameter of 20%, the structure with strut geometry in the form of a spinner showed the highest pressure drop. Thus, the geometry of struts of porous structures has a significant effect on the value of the pressure drop.

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“…The disordered geometrical structure and the possibility of mixing flows inside the porous medium make it possible to use OCF as a heat exchanger [5][6][7][8]. Simultaneously, the porous structure's continuity makes it possible to remove or supply heat in a gaseous medium effectively.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effective porosity of an open cell foam material for using in heat and mass transfer numerical simulations

et al. 2021

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A comparison of the efficiency of the open cell foam (OCF) models is carried out. Geometrical models are constructed by the methods of simple cubic, body-centered cubic, and face-centered cubic. The parameter of the material efficiency is defined as the composition of the material surface area and the gas residence time in the porous media. The analytical evaluation shows different values of effective porosity for different construction models of the material. In this case, for all considered models, the effective porosity is in the range of 0.741-0.821.

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Mathematical Modelling of Heat Transfer in Open Cell Foam of Different Porosities

Cited by 22 publications

References 17 publications

Options for Modernization of Heat Supply to Consumers of Condensing Power Plant

Options for Modernization of Heat Supply to Consumers of Condensing Power Plant

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Evaluation of the effective porosity of an open cell foam material for using in heat and mass transfer numerical simulations

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