Results 71 to 80 of about 13,565 (218)

Sustainable Thermal Solutions: Enhancing Heat Transfer with Turbulators and Nanofluids

Advanced 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, Aggrey Mwesigye, Lingala Syam Sundar, Arun Kumar Tiwari, Kalidasan Balasubramanian, Hafiz Muhammad Ali, Evangelos Bellos, Chaerin Gim, Mohammad Shamsuddin Ahmed, Jang‐Yeon Hwang   +9 more
wiley   +1 more source

Organic rankine cycle with positive displacement expander and variable working fluid composition [PDF]

, 2016
Organic Rankine Cycles are often used in the exploitation of low-temperature heat sources. The relatively small temperature differential available to these projects makes them particularly vulnerable to changing ambient conditions, especially if an air ...
Collings, Peter, Yu, Zhibin
core  

Carbon Dioxide Heat Transfer Coefficients And Pressure Drops During Flow Boiling: Assessment Of Predictive Methods [PDF]

, 2010
Among the alternatives to the HCFCs and HFCs, carbon dioxide emerged as one of the most promising environmentally friendly refrigerants. In past years many works were carried out about CO2 flow boiling and very different two-phase flow characteristics ...
A. Rosato, G. P. Vanoli, MASTRULLO, RITA MARIA ANTONIA, MAURO, ALFONSO WILLIAM   +3 more
core   +1 more source

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

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

Chemical 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, Claudia Guadarrama Serrano, Isabell Viedt, Tamás Farkas, Julia Semrau, Wilhelm Otten, Stefan Krämer, Andreas Schüller   +7 more
wiley   +1 more source

Theoretical investigation of the thermal performance of a novel solar loop-heat-pipe façade-based heat pump water heating system [PDF]

, 2014
The aim of the paper was to present a dedicated theoretical investigation into the thermal performance of a novel solar loop-heat-pipe façade based heat pump water heating system. This involved thermo-fluid analyses, computer numerical model development,
He, Wei, Hong, Xiaoqiang, Ji, Jie, Shen, Jinchun, Zhang, Xingxing, Zhao, Xudong   +5 more
core   +2 more sources

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

Chemie 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, Jennifer Frick, Christoph Krieger, Karsten Müller   +3 more
wiley   +1 more source

ELECTRON SCATTERING CROSS SECTIONS OF 1,1,1,2-TETRAFLUOROETHANE (R134a)

CONTRIBUTED PAPERS & ABSTRACTS of INVITED LECTURES, TOPICAL INVITED LECTURES and PROGRESS REPORTS: 32nd SUMMER School and International Symposium on the Physics of Ionized Gases
Abstract A revised set of electron-molecule-scattering cross section for the refrigerant R134a ( CF 3
Marnik Metting van Rijn, Stephen F Biagi, Christian M Franck   +2 more
openaire   +4 more sources

Two-phase heat transfer in small passages and microfinned surfaces - Fundamentals and applications [PDF]

, 2006
Micro channels and internally finned tubes are increasingly being utilized in the evaporators and condensers of refrigeration systems. The adoption of such geometries in the development of micro-cooling systems is first discussed in this paper.
Al-Dadah, RK, Karayiannis, TG, Rose, J
core  

Process analysis of pressurized oxy-coal power cycle for carbon capture application integrated with liquid air power generation and binary cycle engines [PDF]

, 2015
In this paper, the thermodynamic advantage of integrating liquid air power generation (LAPG) process and binary cycle waste heat recovery technology to a standalone pressurized oxy-coal combustion supercritical steam power generation cycle is ...
Aneke, Mathew, Wang, Meihong
core   +1 more source