Author : LEI. WANG
Publisher :
Page : 0 pages
File Size : 16,12 MB
Release : 2022
Category :
ISBN :
Author : Xin-rong Zhang
Publisher : John Wiley & Sons
Page : 320 pages
File Size : 42,38 MB
Release : 2021-02-17
Category : Science
ISBN : 111838007X
A timely and comprehensive introduction to CO2 heat pump theory and usage A comprehensive introduction of CO2 application in heat pump, authored by leading scientists in the field CO2 is a hot topic due to concerns over global warming and the 'greenhouse effect'. Its disposal and application has attracted considerable research and governmental interest Explores the basic theories, devices, systems and cycles and real application designs for varying applications, ensuring comprehensive coverage of a current topic CO2 heat transfer has everyday applications including water heaters, air-conditioning systems, residential and commercial heating systems, and cooling systems
Author :
Publisher :
Page : 0 pages
File Size : 32,28 MB
Release : 2000
Category :
ISBN :
Within this project, the heat transfer and pressure drop characteristics of CO2 (R-744) were investigated at supercritical pressures (cooling) and subcritical pressures (evaporation). The measurements were carried out with a microchannel type (MPE) tube with 25 parallel ports and a port diameter of 0.787 mm. The experimental data collected confirm that CO2 offers high heat transfer coefficients at supercritical pressures. The comparison of these data with common correlations shows good correspondence. The comparison of the measured pressure drop data with calculation models is satisfactory as well. At evaporation the situation is not as clear. The experiments at high mass fluxes have shown a strongly decreasing heat transfer coefficient from a certain vapour fraction upwards. A comparison with a calculation model for dry-out has shown that this drop has to be expected. On the contrary, at low mass fluxes no influence of the velocity was detected. None of the heat transfer calculation models investigated takes this phenomenon into account. The two-phase pressure drop correlations yield too low values in general, but for a first estimation models from the literature can be taken.
Author : Chen, Lin
Publisher : IGI Global
Page : 821 pages
File Size : 44,97 MB
Release : 2020-08-28
Category : Technology & Engineering
ISBN : 1799857980
Supercritical fluids are increasingly being used in energy conversion and fluid dynamics studies for energy-related systems and applications. These new applications are contributing to both the increase of energy efficiency as well as greenhouse gas reduction. Such research is critical for scientific advancement and industrial innovations that can support environmentally friendly strategies for sustainable energy systems. The Handbook of Research on Advancements in Supercritical Fluids Applications for Sustainable Energy Systems is a comprehensive two-volume reference that covers the most recent and challenging issues and outlooks for the applications and innovations of supercritical fluids. The book first converts basic thermo-dynamic behaviors and “abnormal” properties from a thermophysical aspect, then basic heat transfer and flow properties, recent new findings of its physical aspect and indications, chemical engineering properties, micro-nano-scale phenomena, and transient behaviors in fast and critical environments. It is ideal for engineers, energy companies, environmentalists, researchers, academicians, and students studying supercritical fluids and their applications for creating sustainable energy systems.
Author : Songbai Cheng
Publisher : Frontiers Media SA
Page : 244 pages
File Size : 18,63 MB
Release : 2023-03-03
Category : Technology & Engineering
ISBN : 2832516769
Author : Sujoy Kumar Saha
Publisher : Springer
Page : 181 pages
File Size : 13,38 MB
Release : 2019-07-26
Category : Science
ISBN : 303020748X
This Brief deals with externally finned tubes, their geometric parameters, Reynolds number, dimensionless variables, friction factor, plain plate fins on round tubes, the effect of fin spacing, correlations, pain individually finned tubes, circular fins with staggered tubes, low integral fin tubes, wavy fin, enhanced plate fin geometries with round tubes, Offset Strip Fins, convex louver fins, louvered fin, perforated fin, mesh fin, vortex generator, enhanced circular fin geometries, spine or segmented fin, wire loop fin, flat extruded tubes with internal membranes, plate and fin automotive radiators, performance comparison, numerical simulation, advanced fin geometries, hydrophilic coatings, internally finned tubes and annuli, spirally fluted and indented tube, advanced internal fin geometries, and finned annuli. The book is ideal for professionals and researchers dealing with thermal management in devices.
Author : Lixin Cheng
Publisher : Bentham Science Publishers
Page : 316 pages
File Size : 49,89 MB
Release : 2010-04-21
Category : Science
ISBN : 1608050947
"Multiphase flow and heat transfer have found a wide range of applications in several engineering and science fields such as mechanical engineering, chemical and petrochemical engineering, nuclear engineering, energy engineering, material engineering, ocea"
Author : Ivan CK Tam
Publisher : MDPI
Page : 190 pages
File Size : 30,76 MB
Release : 2021-04-07
Category : Technology & Engineering
ISBN : 3039438417
We live in interesting times in which life as we know it is being threatened by manmade changes to the atmosphere in which we live. On the global scale, concern is focused on climate change due to greenhouse gas emissions, and on a national scale, atmospheric pollution produced by combustion processes is of concern. A possible approach is through the development of new ideas and innovative processes to the current practices. Among the available options, multi-generation processes such as the trigeneration cycle, battery storage system, solar power plants and heat pumps have been widely studied, as they potentially allow for greater efficiency, lower costs, and reduced emissions. On the other hand, some researchers had been working to increase the potential of energy generation process through heat recovery under the steam generator, organic Rankine cycle, and absorption chillers. In this Special Issue on "Thermal Systems” of fundamental or applied and numerical or experimental investigation, many new concepts in thermal systems and energy utilization were explored and published as original research papers in this “Special Issue”.
Author : Srinivas S. Pitla
Publisher :
Page : 0 pages
File Size : 26,34 MB
Release : 2000
Category :
ISBN :
Author : Chen, Lin
Publisher : IGI Global
Page : 712 pages
File Size : 45,90 MB
Release : 2017-03-24
Category : Science
ISBN : 1522520481
Supercritical fluids have been utilized for numerous scientific advancements and industrial innovations. As the concern for environmental sustainability grows, these fluids have been increasingly used for energy efficiency purposes. Advanced Applications of Supercritical Fluids in Energy Systems is a pivotal reference source for the latest academic material on the integration of supercritical fluids into contemporary energy-related applications. Highlighting innovative discussions on topics such as renewable energy, fluid dynamics, and heat and mass transfer, this book is ideally designed for researchers, academics, professionals, graduate students, and practitioners interested in the latest trends in energy conversion.
