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Local flow regime analysis in vertical co-current downward two-phase flow
(Elsevier, 2013)
In this work, both global and local flow regimes in two-phase downward flow in a 50.8 mm internal diameter pipe in adiabatic conditions have been identified. The bubble chord length distributions measured simultaneously ...
Dynamic model of a shell-and-tube condenser. Analysis of the mean void fraction correlation influence on the model performance
(Elsevier, 2013)
A moving-boundary dynamic model of a shell-and-tube condenser is presented. Within this approach, the mean void fraction is a relevant parameter which is obtained, in this work, using different correlations proposed in the ...
Energy influence of the IHX with R22 drop-in and long-term substitutes in refrigeration plants
(Elsevier, 2013-01-10)
This work focuses on the investigation of new drop-in or long-term refrigerants for low evaporating temperatures that can be used as substitutes for HCFC-22, which is gradually being phased-out. This process is already in ...
Design of a model to assess the environmental risk of leachate dams
(Elsevier, 2008)
Leachate dams store very toxic liquids, leachate, that contain a large amount of pollutant substances. Most of them are located in gullies or ravines, so if a dam breaks, leachate would advance downstream provoking an ...
Enfoque metodológico para la innovación en empresas
(Universidad de Piura, 2011-09)
Introduction. A working definition of confabulations would be to describe them as false memories that are the result of some problem in the process of retrieval, while the patient is unaware of their inaccuracy and genuinely ...
Numerical assessment of performance characteristics and two-phase flow dynamics of a centrifugal rotor operating under gas entrainment condition
(SpringerTsinghua University Press, 2021-01-13)
This work presents a numerical study of performance characteristics and flow dynamics of a centrifugal rotor operating with gas-liquid flow. An Euler-Euler polydispersed model is adopted, which was validated in a previous ...
Characterization of Tin/Ethylene Glycol Solar Nanofluids Synthesized by Femtosecond Laser Radiation
(John Wiley & Sons, Ltd., 2016-11-22)
Solar energy is available over wide geographical areas and its harnessing is becoming an essential tool to satisfy the ever-increasing demand for energy with minimal environmental impact. Solar nanofluids are a novel solar ...
Safety factor nomograms for homogeneous earth dams less than ten meters high
(Elsevier, 2009)
Homogeneous earth dams that are waterproofed with geomembranes are a suitable option for storing water and other sorts of liquids, like leachates from landfills. Such dams do not require complicated engineering technical ...
Experimental analysis of R1234yf as a drop-in replacement for R134a in a vapor compression system
(2013-05)
This paper presents an experimental analysis of a vapor compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the energy performance of both refrigerants, R134a and R1234yf, in a ...
Repair vs. replacement: Selection of the best end-of-life scenario for small household electric and electronic equipment based on life cycle assessment
(Elsevier, 2019-11-28)
This study presents a methodology designed for selecting, from an environmental point of view, the best end-of-life scenario for electric and electronic equipment which breaks before the end of its life span. To this end, ...