Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Michal Holubčík"'
Publikováno v:
Frontiers in Energy Research, Vol 12 (2024)
Externí odkaz:
https://doaj.org/article/b52331a5e68d49ee843a5909c1e9e0bd
Publikováno v:
Heliyon, Vol 10, Iss 3, Pp e25139- (2024)
Enormous amount of protective masks was consumed in connection with the COVID-19 pandemic and they still burden the environment. Therefore, it is necessary to look for possibilities of their disposal in an ecologically acceptable way. This article fo
Externí odkaz:
https://doaj.org/article/5a8c5a68afdb405faf575a1572945d06
Autor:
Juraj Trnka, Nikola Čajová Kantová, Michal Holubčík, Alexander Čaja, Tomáš Najser, Jan Najser
Publikováno v:
BioResources, Vol 18, Iss 1, Pp 2137-2145 (2023)
Bio-waste is a source of energy-rich material. Therefore, it can be used in further processes and efficiently utilized. Further processes of waste utilization include compressing them to pellets. However, this type of pellet often has a low bulk dens
Externí odkaz:
https://doaj.org/article/931d5b6619c64ec68dbfafbda12fb741
Autor:
Lucia Martvoňová, Milan Malcho, Jozef Jandačka, Peter Ďurčanský, Michal Holubčík, Július Drozda, Martin Adamička
Publikováno v:
Machines, Vol 11, Iss 8, p 813 (2023)
This experimental study aimed to validate the integration of a gravitational loop heat pipe (GLHP) with respect to a gas fireplace insert. The GLHP was utilized to enhance the efficiency of the fireplace by preheating the combustion air with waste he
Externí odkaz:
https://doaj.org/article/8f199f58164b4fb898912ec6b84469d3
Publikováno v:
Energies, Vol 16, Iss 10, p 4066 (2023)
The objective of this article is to address the challenges associated with visualizing air flow over a heating source in an open laboratory environment. The study uses a combination of experimental visualization and numerical simulation techniques to
Externí odkaz:
https://doaj.org/article/d09a25eceb894a8b9c9cc3fa60ae925f
Autor:
Nikola Čajová Kantová, Michal Holubčík, Alexander Čaja, Juraj Trnka, Peter Hrabovský, Pavol Belány
Publikováno v:
Forests, Vol 14, Iss 3, p 636 (2023)
The COVID-19 pandemic brought a period of high consumption of protective masks and an increase in their waste. Therefore, it was necessary to look at possibilities for their disposal. This article is focused on the disposal of FFP2 masks in the form
Externí odkaz:
https://doaj.org/article/43d0e4692f5e4b0f90f22d0ffbb3b551
Publikováno v:
Fire, Vol 6, Iss 3, p 88 (2023)
Agricultural and other residues are promising renewable energy sources. However, they can cause problems in combustion processes. One of these problems is also low ash melting temperatures. Except, the ash melting behavior can be impacted by many fac
Externí odkaz:
https://doaj.org/article/bd71f502afff4e1ea5b2c3fcfb9150bc
Publikováno v:
EAI Endorsed Transactions on Energy Web, Vol 9, Iss 37 (2022)
INTRODUCTION: Production of emissions from small heat sources burning solid fuels in households inSlovakia is relatively high. At the present time, the operation of such devices are neither controlled norregulated properly and effectively.OBJECTIVES:
Externí odkaz:
https://doaj.org/article/1befafbb47164001b622ff19932a8888
Publikováno v:
Acta Tecnología, Vol 5, Iss 4, Pp 87-92 (2019)
There are two thermodynamic models of the closed and vented heat pump drying process described in the paper. The models have been used for optimization of process design parameters with respect to drying rate and energy efficiency, respectively. The
Externí odkaz:
https://doaj.org/article/53d5cdbd0cb64f3d883b39c4cb3743d5
Publikováno v:
Acta Tecnología, Vol 5, Iss 4, Pp 81-85 (2019)
One of the most important issues in choosing a heating system is the question: What kind of fuel can be burned in given heating system. Modern automatic solid fuel boilers are often specialized only on a narrow range of suitable pellet materials. Pel
Externí odkaz:
https://doaj.org/article/8360749a035c4cadb07f4f501cf408a2