APPLICATIONS OF HEAT PIPES TO ENERGY SYSTEMS AT IROST

Heat pipes application to solar energy systems

Applied Solar Energy ◽

10.3103/s0003701x16010060 ◽

2016 ◽

Vol 52 (1) ◽

pp. 47-60 ◽

Cited By ~ 11

Author(s):

S. M. Khairnasov ◽

A. M. Naumova

Keyword(s):

Solar Energy ◽

Energy Systems ◽

Heat Pipes

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Solar Collectors Based оn Copper Two-Phase Thermosyphons

ENERGETIKA Proceedings of CIS higher education institutions and power engineering associations ◽

10.21122/1029-7448-2020-63-5-472-484 ◽

2020 ◽

Vol 63 (5) ◽

pp. 472-484

Author(s):

V. I. Marynenko ◽

V. S. Kulynych

Keyword(s):

Solar Energy ◽

Solar Collector ◽

Energy Systems ◽

Heat Pipes ◽

Maximum Efficiency ◽

Solar Collectors ◽

Two Phase ◽

Initial Water ◽

The One ◽

Solar Rays

Thermosyphons and heat pipes offer great opportunities for creating pas sive heat and mass transfer systems. Various design solutions using heat pipes (thermosyphons) in solar energy systems are known. Solar energy is one of the promising energy sources, a step towards reducing dependence on other energy resources. To date, there is already an industrial production of solar collectors based on thermosyphons (heat pipes). In solar collectors, the use of thermosyphons (heat pipes) makes it possible to simplify the assembly of the structure, ensures its high modularity, maintainability and reliability. In the course of research, the authors have developed and justified the design of a solar collector based on thermosyphons fixed on panels that absorb solar rays. In order to analyze the efficiency of the solar collector based on two-phase copper thermosyphons, two models of solar collectors were created, viz. the one with a flat absorbing panel and the one with a cylindrical absorbing panel. The areas of the absorbing surfaces were the same. Both models were studied by the method of thermophysycal experiment. The results of studies of the effectiveness of the above-mentioned solar collectors have been obtained. The efficiency of the solar collector based on a copper two-phase thermosyphon, which is fixed on a cylindrical absorbing panel is 2–5 % more than the efficiency of the solar collector based on a copper two-phase thermosyphon, which is fixed on a flat absorbing panel. The maximum efficiency value obtained at low initial water temperatures for solar collectors with a cylindrical and flat absorbing surface was 60 %.

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Modifications of Sub-components in Thermal Power Plants for Exergetic Efficiency

International Journal of Heat and Technology ◽

10.18280/ijht.390227 ◽

2021 ◽

Vol 39 (2) ◽

pp. 573-580

Author(s):

Mallikharjuna Rao Tarla ◽

Srinivasa Rao Surapaneni ◽

Konnanilkunnathil Thomas Varughese

Keyword(s):

Power Plants ◽

Exergy Analysis ◽

Thermal Power ◽

Energy Systems ◽

Heat Pipes ◽

Analysis Tool ◽

Exergetic Efficiency ◽

Steam Condensation ◽

Resource Sustainability ◽

Super Heater

Exergy analysis gaining importance as an engineering analysis tool for energy systems. This paper explores the possibility of decreasing exergy reduction in thermal power plant components like boiler, turbine and condenser and thus increasing exergetic efficiency of Power plants by redesigning the existing design of some important components like platen super heater, final super heater, re heater, condenser, so that resource sustainability improves. The method suggested for exergy destruction in condenser is by using Heat pipes and application of heat pipes for steam condensation has been validated with experimental results.

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