Topic
Heat transfer
About: Heat transfer is a research topic. Over the lifetime, 181795 publications have been published within this topic receiving 2923586 citations. The topic is also known as: heat exchange.
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TL;DR: In this paper, the authors consider the resistance to the flow of heat between two thick solid bodies in contact in a vacuum and compare the performance of single idealized contacts with results of recent electrolytic analog tests to predict the conductance of multiple contacts.
966 citations
Book•
01 Jun 1978
TL;DR: In this article, the authors introduce solar energy conversion, thermal energy storage and transport, and photovoltaics for capturing solar energy through biomass, and economic analysis.
Abstract: 1. Introduction to Solar Energy Conversion 2. Fundamentals of Solar Radiation 3. Methods of Solar Collection and Thermal Conversion 4. Thermal Energy Storage and Transport 5. Solar-Heating Systems 6. Solar Cooling and Dehumidification 7. Passive Methods for Heating, Cooling and Daylighting 8. Solar Thermal Power and Process Heat 9. Photovoltaics 10. Solar Photochemical Applications 11. Capturing Solar Energy through Biomass 12. Introduction to Economic Analysis
960 citations
TL;DR: In this article, mass diffusivities, effective thermal conductivities, and wall heat transfer coefficients were measured in an 8-in. tube packed with 1/2-and 3/4in. glass spheres.
Abstract: Eddy mass diffusivities, effective thermal conductivities, and wall heat transfer coefficients were measured in an 8-in. tube packed with 1/2- and 3/4-in. glass spheres. Superficial mass velocities ranged from 110 to 1,640 Ib./(hr.) (sq. ft.), corresponding to modified Reynolds numbers of 100 to 2,000. Air was the main stream fluid in all cases.
The modified Peclet group (DpV/E*td) was found to be constant at a value of about 12 in the region of fully developed turbulence. At lower Reynolds numbers this group varied with the flow rate. Effective thermal conductivities were correlated by an equation. Modified Peclet numbers for heat transfer were about 25% less than those for mass transfer. The wall heat transfer coefficient varied with the superficial mass velocity as hw = 0.090 (Go0.75).
An explanation is suggested for the similarity in velocity dependence between these values and those for turbulent flow in an empty tube, based on channeling at the wall.
959 citations
TL;DR: In this paper, the authors investigated the role of transient conduction in pool boiling and concluded that the change of surface characteristics during boiling due to trapped particles on the surface is the cause for the shift of the boiling characteristics in the negative direction.
954 citations