Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Petr Kracík"'
Publikováno v:
Case Studies in Thermal Engineering, Vol 40, Iss , Pp 102519- (2022)
The paper deals with a detailed analysis of published analytical relations for heat transfer during steam condensation in a vertical tube. The historical development of the approaches and the chronological development of the used analytical relations
Externí odkaz:
https://doaj.org/article/87e033977a364ba29e8cf00c7428e21f
Publikováno v:
Chemical Engineering Transactions, Vol 88 (2021)
The overall condensing power at condensers is affected by many factors. A condensate film on the pipe wall plays a crucial role in heat transfer. The velocity of the gas phase inside the tubes has a fundamental influence on the movement of the liquid
Externí odkaz:
https://doaj.org/article/160e630b851142a1bb45a825d77f814a
Publikováno v:
Energies, Vol 15, Iss 15, p 5636 (2022)
The paper is concerned with water vapor condensation on vertical pipes. The vertical position of pipes in a condenser is not discussed very often. Its application has a number of particularities in terms of the numerical determination of heat transfe
Externí odkaz:
https://doaj.org/article/06d789a1720b49fba1e7c946dfd2dffb
Publikováno v:
Chemical Engineering Transactions, Vol 81 (2020)
When gas flows inside a vertical tube in which a thin liquid film runs down its wall, interfacial shear stress occurs at the gas-liquid interface. This stress is caused by the imperfectly smooth surface of the film running down. For intensification o
Externí odkaz:
https://doaj.org/article/cf5486ab83124d16aa763688d79eebc7
Autor:
Petr Kracík, Jiří Pospíšil
Publikováno v:
Acta Polytechnica, Vol 55, Iss 5, Pp 329-334 (2015)
Water flowing on a sprinkled tube bundle forms three basic modes: the Droplet mode (the liquid drips from one tube to another), the Jet mode (with an increasing flow rate, the droplets merge into a column) and the Membrane (Sheet) mode (with a furthe
Externí odkaz:
https://doaj.org/article/9d2685999756484fa43b97e26985811b
Publikováno v:
Advances in Mechanical Engineering, Vol 8 (2016)
This article presents research of sprinkled heat exchangers. This type of research has become rather topical in relation to sea water desalination. This process uses sprinkling of exchangers which rapidly separates vapour phase from a liquid phase. A
Externí odkaz:
https://doaj.org/article/bae5d7c0a2cf4e0f9407dbfdb9dabf1a
Publikováno v:
Acta Polytechnica, Vol 54, Iss 1 (2014)
This paper presents the design and test results of an external thermoelectric generator that utilizes the waste heat from a small-scale domestic biomass boiler with nominal rated heat output of 25 kW. The low-temperature Bi2Te3 generator based on the
Externí odkaz:
https://doaj.org/article/c0c6694411e44e5dadf4cd9cbb927714
Heat Exchangers for Condensation and Evaporation Applications Operating in a Low Pressure Atmosphere
Publikováno v:
Acta Polytechnica, Vol 52, Iss 3 (2012)
This paper presents a state-of-the-art study of a heat transfer process in liquid spraying heat exchangers placed in a vacuum chamber. The experimental case studied here describes the behavior of a falling film evaporation and condensation mode on ho
Externí odkaz:
https://doaj.org/article/547ccda50ff149eb8bf8b769ad5f89f0
Autor:
Markéta Kalivodová, Marek Baláš, Pavel Milčák, Hana Lisá, Martin Lisý, Jakub Lachman, Petr Kracík, Peter Križan, Karel Vejražka
Publikováno v:
Paliva. :8-20
Biomass has increasingly been used as a renewable energy source, and the possibility of using waste ma-terials for energy purposes has recently been highlighted. Therefore, it is necessary to know the properties of these fuels. The most important is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1b134ced590c95772c63aa05525e453
https://doi.org/10.35933/paliva.2022.01.02
https://doi.org/10.35933/paliva.2022.01.02
Publikováno v:
Energy. 182:1013-1027
Many economic and environmental restrictions have resulted in the growth of dry cooling technology. The air-cooled condenser (ACC), which can be used in power plants and other facilities, represents a way toward the minimisation of the water footprin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83d1e67f2786a1487e0390cfe8bad413
https://doi.org/10.1016/j.energy.2019.06.113
https://doi.org/10.1016/j.energy.2019.06.113