Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Cătălina Dobre"'
Publikováno v:
Inventions, Vol 9, Iss 4, p 76 (2024)
This paper presents the mathematical modeling of the oxygen transfer process using partial differential equations (PDEs). This process is crucial in various environmental and engineering applications, such as wastewater treatment, aeration systems, a
Externí odkaz:
https://doaj.org/article/a7c4416859ba482fb538f01afbda9cb9
Publikováno v:
Inventions, Vol 9, Iss 4, p 82 (2024)
The transition towards a sustainable and renewable energy future is essential to mitigate climate change and reduce greenhouse gas emissions. Small–medium combined heat and power (CHP) systems are increasingly popular for distributed energy generat
Externí odkaz:
https://doaj.org/article/c4c45a0163fd401bbad491cf9bb363ee
Publikováno v:
Entropy, Vol 23, Iss 3, p 368 (2021)
The purpose of the study is to show that two simple models that take into account only the irreversibility due to temperature difference in the heat exchangers and imperfect regeneration are able to indicate refrigerating machine behavior. In the pre
Externí odkaz:
https://doaj.org/article/fbe9db9c815246e2badd9ba755bb7297
Publikováno v:
Entropy, Vol 22, Iss 11, p 1278 (2020)
The paper presents experimental tests and theoretical studies of a Stirling engine cycle applied to a β-type machine. The finite physical dimension thermodynamics (FPDT) method and 0D modeling by the imperfectly regenerated Schmidt model are used to
Externí odkaz:
https://doaj.org/article/f369b900d0154435a2f776d867983490
Autor:
Camelia Stanciu, Dorin Stanciu, Adina-Teodora Gheorghian, Elena-Beatrice Tănase, Cătălina Dobre, Marius Spiroiu
Publikováno v:
Entropy, Vol 19, Iss 12, p 676 (2017)
A solar driven cooling system consisting of a single effect H2O-LiBr absorbtion cooling module (ACS), a parabolic trough collector (PTC), and a storage tank (ST) module is analyzed during one full day operation. The pressurized water is used to trans
Externí odkaz:
https://doaj.org/article/3b53c9381d6a4908ade915bea828e69f
Autor:
Gabriel Fischer-Szava, Nicolae Băran, Mihaela Constantin, Mugurel Oprea, Cătălina Dobre, Georgiana Duiculete, Beatrice Ibrean
Publikováno v:
World Journal of Engineering and Technology. 11:41-47
Autor:
Daniel Taban, Valentin Apostol, Lavinia Grosu, Mugur C. Balan, Horatiu Pop, Catalina Dobre, Alexandru Dobrovicescu
Publikováno v:
Entropy, Vol 25, Iss 11, p 1531 (2023)
To improve the efficiency of a diesel internal combustion engine (ICE), the waste heat carried out by the combustion gases can be recovered with an organic Rankine cycle (ORC) that further drives a vapor compression refrigeration cycle (VCRC). This w
Externí odkaz:
https://doaj.org/article/7dbd7ffee62f459ea808f0ccdf2a8437
Publikováno v:
Entropy, Vol 24, Iss 6, p 748 (2022)
The use of organic Rankine cycles (ORCs) is a viable solution for the recovery of waste heat. For an air separation unit (ASU) with a production of V˙O2=58300mN3/h operating in Romania, the value of utilization of the heat transferred to the cooling
Externí odkaz:
https://doaj.org/article/596a941595254554b17c61424d8a024a
Autor:
Sorin Bucsa, Alexandru Serban, Mugur C. Balan, Claudia Ionita, Gabriel Nastase, Catalina Dobre, Alexandru Dobrovicescu
Publikováno v:
Entropy, Vol 24, Iss 2, p 272 (2022)
This case study analyzes a cryogenic air separation unit (ASU) with a production of V˙O2=58,300 [m3Nh] of gaseous oxygen with a concentration greater than 98.5%, operating in Romania on a steel plant platform. The goal of the paper is to provide an
Externí odkaz:
https://doaj.org/article/431650001c984095a182818899bd053f
Publikováno v:
Entropy, Vol 23, Iss 5, p 504 (2021)
An irreversible Carnot cycle engine operating as a closed system is modeled using the Direct Method and the First Law of Thermodynamics for processes with Finite Speed. Several models considering the effect on the engine performance of external and i
Externí odkaz:
https://doaj.org/article/89fa940545b74dd890aca7ca58f6a268