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Frontiers in Energy Research, 2023 In order to improve the application possibility of CO2/R41 azeotropy mixture in the refrigeration industry, the optimum mass ratio of composition is defined and determined according to the thermodynamic properties and safety.
Dong Wang +6 more
exaly +4 more sources
International Journal of Thermofluids, 2023 In this work, the refrigerant R1233zd(E) (A1 ASHRAE safety code) is investigated for the possible substitution of refrigerant R161 (A2 ASHRAE safety code) in a cascade refrigeration system. The high-temperature circuit refrigerant R1233zd(E) is evaluated
Vivek K. Patel +4 more
doaj +1 more source
Results in Engineering, 2023 This article presents a novel cascade configuration for a compression absorption refrigeration system by combing a single effect absorption cycle with a reheater at the higher temperature circuit (HTC) and a modified vapor compression cycle with the ...
Md Walid Faruque +3 more
doaj +1 more source
Spacelike Willmore surfaces in 4-dimensional Lorentzian space forms [PDF]
, 1996 Spacelike Willmore surfaces in 4-dimensional Lorentzian space forms, a topic in Lorentzian conformal geometry which parallels the theory of Willmore surfaces in $S^4$, are studied in this paper. We define two kinds of transforms for such a surface, which
Ma, Xiang, Wang, Peng
core +6 more sources
Transport in times of an epidemic: public transport measures in the Czech Republic and its regions
Review of Economic Perspectives, 2021 In the first half of 2020, the global pandemic of the COVID-19 virus became a phenomenon affecting all spheres of human life. Measures against the spread of the virus have led to restrictions in life in public spaces and have also affected the transport ...
Vrána Martin +3 more
doaj +1 more source
Travel behaviour changes during the pandemic: Prague-Pilsen rail case study
Review of Economic Perspectives, 2022 The COVID-19 pandemic has affected many aspects of our everyday lives. Governments have taken numerous measures to contain the spread of the pandemic, which has had a direct impact on daily mobility, modal choice and the function of public transport ...
Surmařová Simona +2 more
doaj +1 more source
The disutility of driving below the speed limit on highways
Review of Economic Perspectives, 2022 Reducing travel speed below the highway speed limit leads to savings in fuel consumption and CO2 emissions. However, car drivers may be reluctant to drive more slowly either because they do not want to lose time or for other reasons we refer to as ‘the ...
Filipi Nikol +2 more
doaj +1 more source
WSEAS TRANSACTIONS ON MATHEMATICS, 2021 In this paper, we study inextensible flows of spacelike curves lying fully on a spacelike surface Ω according to equiform frame in 4-dimensional Minkowski space ℝ1 4 . We give necessary and sufficient conditions for this inextensible flows which are expressed as a partial differential equation involving the equiform curvature functions in 4-dimensional
W. M. Mahmoud, Alaa Hassan Noreldeen
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Carbon Dioxide + Fluoromethane and Nitrous Oxide + Fluoromethane: Solid−Liquid Equilibria Measurements [PDF]
, 2010 A recently built experimental setup was employed for the estimation of the solid-liquid equilibria (SLE) of alternative refrigerant systems.
Di Nicola, Giovanni +4 more
core +1 more source
Thermal Science, 2022 A 3-D flow and heat transfer theoretical model was established for a 5 mm micro-fin tube to explore the heat transfer and flow characteristics of supercritical CO2/R41 therein under different pressures, mass fluxes, and components. The research attempts to provide reference for selecting components of working media and setting the pressure and mass ...
Ruoyu Dai +4 more
openaire +1 more source