Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Dimitrios Tsimpoukis"'
Autor:
Dimitrios Tsimpoukis, Evangelos Syngounas, Evangelos Bellos, Maria Koukou, Christos Tzivanidis, Stavros Anagnostatos, Michail Gr. Vrachopoulos
Publikováno v:
Energy Conversion and Management: X, Vol 18, Iss , Pp 100351- (2023)
Aiming to reduce the use of conventional energy sources, alternative methods should be applied in order to cover society’s needs. In this context, in the present study, the operation of a transcritical CO2 commercial refrigeration unit is investiga
Externí odkaz:
https://doaj.org/article/b294b9e7d0ba4957990dacd7a76b887c
Autor:
Evangelos Bellos, Panagiotis Lykas, Dimitrios Tsimpoukis, Dimitrios N. Korres, Angeliki Kitsopoulou, Michail Gr. Vrachopoulos, Christos Tzivanidis
Publikováno v:
Applied Sciences, Vol 13, Iss 6, p 4066 (2023)
The goal of this investigation is the thorough analysis and optimization of a solar-assisted heat pump heating unit for covering the space heating demand for a building in Athens, Greece. The novelty of the studied system is the use of a high-tempera
Externí odkaz:
https://doaj.org/article/f0de2d277eee473a8f36de1b9e326d3a
Autor:
Evangelos Bellos, Dimitrios Tsimpoukis, Panagiotis Lykas, Angeliki Kitsopoulou, Dimitrios N. Korres, Michail Gr. Vrachopoulos, Christos Tzivanidis
Publikováno v:
Applied Sciences, Vol 13, Iss 4, p 2072 (2023)
High-temperature heat pumps consist of a promising choice for substituting conventional boilers and producing hot water with temperature levels in the range of 70–80 °C. The use of high-temperature heat pumps makes it possible to exploit the exist
Externí odkaz:
https://doaj.org/article/15e6385b9d3446c2af6993fda83b1a1d
Autor:
Georgios Mitsopoulos, Evangelos Syngounas, Dimitrios Tsimpoukis, Evangelos Bellos, Christos Tzivanidis, Stavros Anagnostatos
Publikováno v:
Energy Conversion and Management: X, Vol 1, Iss , Pp - (2019)
The recent regulation concerning the ban of the hydro-fluorocarbon (HFC) refrigerants has led to the employment of environmentally friendly solutions for refrigeration. Systems that employ CO2 seem to be a viable option which is compatible with the c
Externí odkaz:
https://doaj.org/article/cb8f6057d5ef43c0b26b470b17ceeb31
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 236:1192-1209
This study investigates the integration of a solar absorption chiller by means of subcooling to a CO2 booster system that serves the refrigeration needs of a supermarket refrigeration plant with an installed capacity of 80 kW and 20 kW for medium and
Publikováno v:
Green Energy and Sustainability. :1-24
CO2 refrigeration configurations are the most viable solution for commercial refrigeration plants, which are however accompanied with energy challenges due to their low energy efficiency when operating under high ambient temperatures. This study exam
Publikováno v:
Renewable and Sustainable Energy Reviews. 91:358-375
Parabolic trough collector is one of the most usual solar collectors for applications up to 400 °C. The thermal enhancement of this collector concentrates a lot of interest and various techniques are tested in order for the thermal efficiency to be
Publikováno v:
Applied Thermal Engineering. 137:669-677
Parabolic trough collectors are among the most mature solar concentrating technologies which are applied in numerous applications. The enhancement of their performance is a crucial issue in order to be established as a feasible technology. The use of
Publikováno v:
Energy Conversion and Management. 156:388-402
The use of nanofluids in parabolic trough collectors is a promising technique for enhancing their performance. This study investigates the dispersion of CuO nanoparticles in Syltherm 800 (thermal oil) and in nitrate molten salt (60% NaNO3 – 40% KNO
Publikováno v:
Applied Energy. 205:540-561
Among the solar concentrating technologies, parabolic trough collector (PTC) is the most mature and cost-effective technology for medium and high-temperature levels (150–400 °C). This paper investigates the utilization of internally finned absorbe