This type of solar collector is more efficient because it uses thermosyphons
in order to enhance the transfer of heat for water heating.
Buoyancy, natural convection, behavior in porous media, and behavior upon boiling are discussed before ending with applications to heat pipes and thermosyphons
, entropy minimization problems, and a chapter on gas-based nanofluids.
This edition has been revised to integrate new information on the underlying theory of heat pipes and heat transfer and has new data on thermosyphons
, applications, and manufacturing methods.
Gravity Assisted Heat Pipes And Two Phase Thermosyphons
Have Excellent Heat Transport Properties.
There are two main types of thermosyphons
: two-phase closed-type thermosyphons
(TCT), and two-phase loop-type thermosyphons
For example, these so-called thermosyphons
are in use in the Alaskan oil pipeline, in order to keep the heat from the pipes from melting the permafrost.
For many years, heat pipe heat exchangers (HPHXs) with two-phase closed thermosyphons
have been widely applied as dehumidification enhancement and energy savings devices in HVAC systems in Western countries (Yau 2007), and the application of a double heat pipe heat exchanger system in the conventional air handler unit operating in a tropical climate is strongly recommended as an efficient method for humidity control and energy savings in order to maintain acceptable room conditions (Yau 2008).
The university researchers focused on the use of two-phase thermosyphons
to meet these requirements.
Buried almost 100 ft and rising to 30 ft aboveground, thermosyphons
allow ground heat to escape, thereby maintaining the dam's frozen core.
Water is stored in an insulated 150,000-gallon bolted steel tank located on an insulated gravel pad with buried thermosyphons
, which transfer heat from the pad to the atmosphere, keeping the underlying soils frozen.
In a step towards more energy efficiency and sustainability, physicists and engineers from all over the world--but with a hefty representation from Belarus--explain current adsorption research and technologies for relevant applications based on using the efficient heat transfer devices heat pipes and two-phase thermosyphons