What are the typical applications of a heat pipe in heat exchangers?
Heat pipes were first developed for use by Los Alamos National Laboratory to supply heat to and remove waste heat from energy conversion systems. Today, heat pipes are used in a variety of cooling applications from space to medical devices and power electronics cooling to aircraft and more!
What are the advantages of heat pipe?
Advantages of heat pipe The effective thermal conductivity is very high since the heat pipe operates on a closed two-phase cycle. Therefore, it can transport large quantity of heat with very small temperature difference between evaporator and condenser sections.
What is heat pipe system?
A heat pipe is a two-phase heat transfer device with a very high effective thermal conductivity. It is a vacuum-tight device consisting of an envelope, a working fluid, and a wick structure. As shown in the video below, the heat input vaporizes the liquid working fluid inside the wick in the evaporator section.
What material is used for heating pipes?
Modern CPU heat pipes are typically made of copper and use water as the working fluid. They are common in many consumer electronics like desktops, laptops, tablets, and high-end smartphones.
What is the application of heat pipe?
Nowadays heat pipes are used in several applications, where one has limited space and the necessity of a high heat flux. Of course it is still in use in space applications, but it is also used in heat transfer systems, cooling of computers, cell phones and cooling of solar collectors.
What is a heat pipe PDF?
A heat pipe heat exchanger is a simple device which is. made use of to transfer heat from one location to another, using an evaporation-condensation cycle. Heat pipes are referred to as the “superconductors” of heat. due to their fast transfer capability with low heat loss[1].
Where are pipes used?
Uses
- Plumbing.
- Tap water.
- Irrigation.
- Pipelines transporting gas or liquid over long distances.
- Compressed air systems.
- Casing for concrete pilings used in construction projects.
- High-temperature or high-pressure manufacturing processes.
- The petroleum industry: Oil well casing. Oil refinery equipment.
Who invented heat pipes?
The history of the heat pipe can be traced back to Angier March “AM” Perkins |1| who in 1831 took out a patent on a “hermetic boiler tube”. He dabbled with the idea of a working fluid, but only in the sense of a single phase device at a high pressure.
What is the applications of heat pipe?
What is the pressure inside heat pipe?
A copper-water heat pipe at 100C (212F) will show an internal pressure of 1 ATM (14.69 psi). The critical point of water is about 374 C. A copper pipe can’t stand the related pressure. Therefore, for most Copper-Water heat pipes, the maximum safe operating temperature is between 130 and 165C (>9 ATM, 130 psi).
What are different types of pipes and their uses?
There are five main types of plumbing pipe materials that are still in use today: copper, galvanized steel, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), and cross-linked polyethylene (PEX). Chlorinated polyvinyl chloride (CPVC) is also used.
How do you calculate pipe size?
The equation for pipe diameter is the square root of 4 times the flow rate divided by pi times velocity. For example, given a flow rate of 1,000 inches per second and a velocity of 40 cubic inches per second, the diameter would be the square root of 1000 times 4 divided by 3.14 times 40 or 5.64 inches.
What is wick in heat pipe?
A capillary structure (wick) can be placed inside the heat pipe body to allow the condensed liquid phase of the working fluid wicking against the vapor flow due the capillary action. Such a heat pipe is called a wick heat pipe.
What is the main characteristics of heat pipe?
A heat pipe has an effective thermal conductivity much larger than that of a very good metal conductor, such as copper. Figure 4 shows a copper-water heat pipe and a copper pipe dipped into an 80°C water bath. Both pipes were initially at 20°C temperature.