Results 71 to 80 of about 15,890 (250)

Sustainable Thermal Solutions: Enhancing Heat Transfer with Turbulators and Nanofluids

open access: yesAdvanced Energy and Sustainability Research, Volume 6, Issue 5, May 2025.
Nanofluids, which are nanoparticle suspensions in base fluid, facilitate heat transmission due to their improved thermal conductivity. Turbulators, which are inserts into fluid flow channels, disturb the flow, increasing turbulence and hence the heat transfer rate.
Zafar Said   +9 more
wiley   +1 more source

Experimental flow boiling study in a 0.52 mm diameter vertical tube using R134a [PDF]

open access: yes, 2008
This article is also available online from the link below.Experimental results for R134a boiling on a vertical stainless steel tube of internal diameter 0.52 mm are presented in this paper.
Karayiannis, TG   +3 more
core  

Energy and Exergy Efficiency Analysis of an Ejector‐Expansion Refrigeration Cycle Using the Working Fluid R134a and Its Potential Substitutes

open access: yesEnergy Science &Engineering, Volume 13, Issue 5, Page 2389-2400, May 2025.
ABSTRACT This paper proposes an ejector‐expansion refrigeration cycle (EERC) with two evaporating temperatures to recover partial expansion work and greatly reduces the throttling loss of the other expansion valve connected to the evaporator compared with the conventional bievaporator refrigeration cycle (CBEC).
Xiaoqin Liu, Weibin Wang, Jianyong Wang
wiley   +1 more source

Simulation and performance research of absorption heat pump unit based on R134a-DMF working fluid pair

open access: yesEnergy and Built Environment
R134a-DMF absorption heat pump unit is an energy-saving heat pump unit that can utilize renewable energy, and has great potential in the refrigeration and heating fields of urban and rural areas.
Zhaoyi Zhuang   +4 more
doaj   +1 more source

Simulation Model Exchange in Process Industry: Requirements, Solutions, and Open Challenges

open access: yesChemical Engineering &Technology, Volume 48, Issue 3, March 2025.
Simulation models are vital for process plant lifecycles, including engineering. As the process industry adopts modularization, plant components are designed by manufacturers holding critical knowledge. This paper details requirements for model exchange, reviews solutions, and highlights challenges.
Jonathan Mädler   +7 more
wiley   +1 more source

Comparative evaluation of various GPS-free localization algorithm for wireless sensor networks [PDF]

open access: yes, 2004
Wireless Sensor Networks (WSN) are tremendously being used in different environments to perform various monitoring tasks such as search, rescue, disaster relief, target tracking and a number of tasks in smart environments.
Musbahi, Amal Mustafa
core  

A Correlation‐Based Prediction Method of Heat Transfer Coefficients for Flooded Evaporation on Enhanced Tubes

open access: yesChemie Ingenieur Technik, Volume 97, Issue 1-2, Page 43-50, February 2025.
An enhanced tube which is optimized for pool boiling was examined with the refrigerants R134a, R1234ze(E), and propane. The measured heat transfer coefficient is compared to literature‐based correlations and also the transferability. For a better prediction of the shell‐side heat transfer coefficient a new correlation is proposed.
Marco Möhrle   +3 more
wiley   +1 more source

Flow boiling pressure drop of R134a in micro diameter tubes: Experimental results and assessment of correlations [PDF]

open access: yes, 2011
This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
3rd Micro and Nano Flows Conference (MNF2011)   +3 more
core  

Research advances of metal fluoride for energy conversion and storage

open access: yesCarbon Energy, Volume 7, Issue 1, January 2025.
Renewable energy faces storage challenges. Metal fluorides' potential in energy conversion is examined. This review summarizes their characteristics, challenges, and improvements in batteries, supercapacitors, and water electrolysis. It guides future breakthroughs in metal fluoride applications for energy storage.
Runlin Zhang   +5 more
wiley   +1 more source

Comparative study of heat transfer and pressure drop during flow boiling and flow condensation in minichannels [PDF]

open access: yes, 2014
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the ...
4th Micro and Nano Flows Conference (MNF2014)   +4 more
core  

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