Wyniki wyszukiwania - BazTech

1

The performance of H2O, R134a, SES36, ethanol, and HFE7100 two-phase closed thermosyphons for varying operating parameters and geometry

Andrzejczyk R., Muszyński T.

Archives of Thermodynamics

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2017

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Vol. 38, no. 3

3--21

EN

In this study, the influences of different parameters at performance two-phase closed thermosiphon (TPCT) was presented. It has been confirmed that the working fluid, as well as operating parameters and fill ratio, are very important factors in the performance of TPCT. The article shows characteristics of gravitational tube geometries, as well as the technical characteristic of the most important system components, i.e., the evaporator/condenser. The experiment’s plan and the results of it for the two-phase thermosiphon for both evaluated geometries with varying thermal and fluid flow parameters are presented. Experiments were performed for the most perspective working fluids, namely: water, R134a, SES36, ethanol and HFE7100. Obtained research proves the possibility to use TPCT for heat recovery from the industrial waste water.

2

Application of water equivalents method to calculations of cross-finned aluminium heat exchangers

Karczewski K.

Metallurgy and Foundry Engineering

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2010

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Vol. 36, no. 1

37-46

EN

On an experimental post were carried out hydraulic and heat research of exchanger elements made of aluminium alloy. The research and calculations make possible to identify the reduction over-all heat-transfer coefficient from oil to heating air. The results of research enable to determine by water equivalents method design and using parameters of heat exchanger.

PL

Na stanowisku doświadczalnym wykonano badania hydrauliczne i cieplne elementów wymiennika ciepła ze stopu aluminiowego. Badania i obliczenia umożliwiły identyfikację zredukowanego współczynnika przenikania ciepła od oleju do nagrzewanego powietrza. Wyniki badań umożliwiły określenie według metody równoważników wodnych parametrów konstrukcyjnych i eksploatacyjnych wymiennika ciepła.

3

Application of water equivalents method to calculation of ceramic heat exchangers

Karczewski K.

Metallurgy and Foundry Engineering

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2009

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Vol. 35, no. 2

137-145

EN

Application of water equivalents method to calculation of ceramic heat exchangers are presented. By water equivalents method, mathematic model and algorithm of calculation the recuperators made of magnesia shapes were elaborated. By the model, ceramic recuperator to glass melting tank were calculated.

PL

Według metody równoważników wodnych opracowany został model matematyczny i algorytm obliczeń rekuperatorów ceramicznych wykonanych z kształtek magnezytowych. Według modelu obliczono rekuperator do wanny szklarskiej.

4

Application of water equivalents method to calculation of radiation recuperators with microfinned surface

Karczewski K.

Metallurgy and Foundry Engineering

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2008

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Vol. 34, no. 1

39-51

EN

The calculation algorithm by water equivalents method to radiation recuperators with micro-finned surface were elaborated. In this algorithm model research of heat transfer and hydraulic resistance microfinned elements was applied. By elaborated algorithm radiation recuperator with microfinned surface to heat furnace were projected.

PL

Według metody równoważników wodnych opracowano algorytm do obliczeń rekuperatorów radiacyjnych z mikroużebrowaniem. W algorytmie wykorzystano badania modelowe wymiany ciepła i oporów przepływu mikroużebrowanych elementów rekuperatorowych. Według opracowanego algorytmu zaprojektowano rekuperator radiacyjny z mikroużebrowaniem do pieca grzewczego.