Results 41 to 50 of about 429 (184)

Determination of the temperature distribution in a minichannel using ANSYS CFX and a procedure based on the Trefftz functions

open access: yesEPJ Web of Conferences, 2017
This work discusses the mathematical model for laminar-flow heat transfer in a minichannel. The boundary conditions in the form of temperature distributions on the outer sides of the channel walls were determined from experimental data.
Maciejewska Beata   +2 more
doaj   +1 more source

Digital Flow Rate Measurement System Design for Minichannel based on Cross Correlation Technique [PDF]

open access: yesEngineering and Technology Journal, 2017
In this paper, a demonstration for an experimental study to measure mean fluid velocity in minichannels is presented. Fluid flow velocity was estimated by applying cross correlation technique on measured thermal fluctuation using two ultra-small ...
H.A. Dhahad, E.M. Alfayydh, K.H. Fahem
doaj   +1 more source

Assessment of the performance of ultralow‐GWP refrigerants in a two‐stage heat pump system using simulation and MCMD

open access: yesEnvironmental Progress &Sustainable Energy, Volume 45, Issue 4, July/August 2026.
Abstract The Kigali Amendment's mandate to phase down high‐GWP refrigerants highlights the urgent need for sustainable alternatives in cold climate heat pumps, which are critical for delivering efficient heating in severely cold regions. This study evaluates ultralow‐GWP refrigerants—R‐290, R‐152a, R‐161, R‐1234yf, and R‐1234ze(E)—for application in a ...
Kuanrong Qiu, Martin Thomas
wiley   +1 more source

Investigation of Two-Phase Flow in Short Horizontal Mini Channel Height of 1 MM

open access: yesMATEC Web of Conferences, 2016
The experiments with two-phase flow in the short horizontal rectangular minichannel with the height of 1 mm and width of 29 mm have been carried out using water and gas nitrogen.
Ron’shin Fedor, Cheverda Vyacheslav
doaj   +1 more source

Theoretical Investigation of the Temperature Limits of an Actively Cooled High Concentration Photovoltaic System

open access: yesEnergies, 2020
Concentrator photovoltaics have several advantages over flat plate systems. However, the increase in solar concentration usually leads to an increase in the solar cell temperature, which decreases the performance of the system.
Asmaa Ahmed   +3 more
doaj   +1 more source

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

open access: yesAsia-Pacific Journal of Chemical Engineering, Volume 21, Issue 2, March/April 2026.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

Shaping the Future of Energy: Breakthrough Additive Manufacturing (3D) Technologies for Renewables

open access: yesInternational Journal of Energy Research, Volume 2026, Issue 1, 2026.
Additive manufacturing (AM), a rapidly growing field of application, is widely used to create environmentally friendly energy production and storage systems. This study presents a comprehensive analysis of recent developments in the production of renewable energy systems (RESs) using AM technologies, focusing on advantages, challenges, and possible ...
Gülbahar Bilgiç Tüzemen   +7 more
wiley   +1 more source

Boiling and Condensing Two-Phase Frictional Pressure Drop Within Minichannel Tubes—Comparison and New Model Development Based on Experimental Measurements

open access: yesEnergies
This study presents a comprehensive experimental investigation into the frictional pressure drop of two-phase flows—boiling and condensation—in horizontal minichannels, emphasizing its impact on the energy efficiency of vapor compression systems. A total
Calos Martínez-Lara   +2 more
doaj   +1 more source

Numerical modelling of temperature fields in the flow boiling liquid through a vertical minichannel with an enhanced heating surface

open access: yesEPJ Web of Conferences, 2014
The paper presents results of heat transfer research on flow boiling in a rectangular minichannel positioned vertically, with an enhanced surface. One of the channel walls was made of thin foil powered by direct current. This foil is enhanced on the side
Hożejowska Sylwia, Piasecka Magdalena
doaj   +1 more source

Thermal Management Enhancement of Photovoltaic Module (PVM) and PV/Thermal Module (PV/TM) Using Fins: A Review

open access: yesInternational Journal of Photoenergy, Volume 2026, Issue 1, 2026.
PVM and PV/TM are currently common for greener energy generation, but the operating temperatures can greatly influence their performance. Hence, thermal management is crucial for improving performance and reliability. Our review details a detailed study on fin‐based cooling techniques utilised for PVM and PV/TM.
G. Anitha   +3 more
wiley   +1 more source

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