Wyniki wyszukiwania - BazTech

1

Working parameters of gas heat pump in use with low-potential geothermal energy

Malcho M., Lenhard R., Vantúch M., Kaduchová K., Puchor T.

Structure and Environment

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2018

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Vol. 10, no. 2

180--183

EN

The article presents the operating parameters of the heat pump for gas with low potential geothermal energy. It describes the measurement device and implementations of the experimental measurements resulted in a database of relevant data on the conversion of primary energy to natural gas to GHP heat, using low potential energy from a deep well.

PL

W artykule przedstawiono parametry pracy gazowej pompy ciepła, korzystającej z energii geotermalnej niskiej entalpii. Zaprezentowano wykorzystywane stanowisko pomiarowe, a także zastosowanie wyników pomiarów do budowy bazy danych eksperymentalnych na temat konwersji energii pierwotnej gazu ziemnego w ciepło, przy użyciu pompy ciepła współpracującej z pionowym wymiennikiem gruntowym.

2

Accumulation of low-potential thermal energy

Malcho M., Lenhard R., Kadúchová K., Ďurčanský P.

Structure and Environment

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2018

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Vol. 10, no. 1

87--91

EN

The article presents interpretation of accumulation of thermal energy in a vertical borehole. It describes measuring device and final graph of measurement. It studies mainly the influence of water on storage capacity of the vertical borehole.

PL

Artykuł przedstawia zagadnienie magazynowania ciepła w pionowym odwiercie w gruncie. Przybliża on zastosowane urządzenia pomiarowe i schemat układu pomiarowego, a także analizuje wpływ wody na zdolności magazynowania ciepła w pionowym odwiercie.

3

Concentration optimalization of ethylene glycol in the ground heat exchanger heat pump

Kaduchová K., Lenhard R., Malcho M.

Journal of New Technologies in Environmental Science

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2018

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Vol. 2, nr 1

8--12

EN

At present, particular attention is paid to the diversification of heat sources, to the efficient use of energy and to the ecological aspects of the use of primary energies, especially in the EU and within the Slovak republic. A very good way to achieve the use of renewable energy sources. Slovak republic has a real renewable energy potential mainly in biomass, geothermal energy, solar energy and hydroponics of rivers. Every kind of renewable energy has its own specifics. In the Slovak republic water energy and biomass are currently used. In Slovak republic there are suitable conditions for use of geothermal energy due to its suitable placement on breaks in the Carpathian arc. The average geothermal gradient for the SR is 33 K/km, with some locations up to 50 K/km, while the average is 30 K/km in the world. Hydrological research has been focused on prospective geothermal waters with temperatures ranging from 25°C to 150°C with a total usable potential of more than 5 500 MW. The problem of using geothermal water is its potential (water temperature) and mineralization causing the incrustation of pipelines and other system facilities. While geothermal resources with a water temperature above 25°C are closely linked to certain locations, the country's low-potential energy is above average in the whole of Slovak republic. Geothermal heat from the ground is most commonly obtained through horizontal ground/water type heat exchanger (about 40 W/m) or through vertical exchanger embedded in deep boreholes of approximately 100-150 m (40-60 W/m) [4].

4

Visualization of heat transport in heat pipes using thermocamera

Nemec P., Caja A., Lenhard R.

Archives of Thermodynamics

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2010

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Vol. 31, no. 4

125-132

EN

Heat pipes, as passive elements show a high level of reliability when taking heat away and they can take away heat flows having a significantly higher density than systems with forced convection. A heat pipe is a hermetically closed duct, filled with working fluid. Transport of heat in heat pipes is procured by the change of state of the working fluid from liquid state to steam and vice versa and depends on the hydrodynamic and heat processes in the pipe. This study have been focused on observing the impact these processes have on the heat process, the transport of heat within the heat pipe with the help of thermovision. The experiment is oriented at scanning the changes in the surface temperatures of the basic structural types of capillary heat pipes in vertical position.