The device of the heat pipe and the principle of its operation

Types of pipes for heating systems.

heat pipe is airtight structure capable of transmitting heat.The principle of its operation is closed cycle of evaporation and condensation of fluid and heat transfer process external sources.Those.a closed metal container, which has a high degree of conductivity and filled with water, by heating one side will evaporate.When you go to a cold surface, the vapor again becomes liquid and flows to its original location.This generates heat that is emitted from the surface of the metal container.

very heat pipe design consists of:

• metal body having a good thermal conductivity;
• filled with liquid;
• wick fluid movement

body is made of materials such as glass, ceramics and metal alloys.Inside, it is filled with a liquid having the physical ability to move their liquid to gaseous state.This fluid is a source of thermal energy.

wick is a porous material capable of moving fluid from the capillaries at its one end to the other device.

functionality of such a device depends on the materials, dimensions and operating specifications of parts and is in heat transfer efficiency.

addition to conventional heat pipes, there are its advanced counterparts - the contour of the pipe.

This product is an option bezfitilny pipe, where the wick function is performed by the contour of the tube, replacing the capillaries, but a larger diameter.

and have such a tube a number of advantages:

• sufficiently high degree of heat;
• Simple design;
• durability and reliability;
• resistance to the environment;
• High wear resistance due to the immobility of its constituent elements;

Today, the contour of the pipe can be attributed to one of the best conductors of thermal energy.

heat pipes where used?

This type of product as versatile that it is used in various fields:

• in microelectronics;
• When installing heating systems;
• in refrigeration systems;
• in the aerospace industry;
• pharmacology and medicine;
• When equipment greenhouses.

And this is not a complete list of industries, including nanotechnology, use pipe heating networks.

Heating heat pipes.

pipes, radiant heat may well be used to heat homes.Most suitable for this purpose, the construction of a zinc steel, sintered metal or asbestos.It is also possible metal alloy - bimetal.

most popular material is asbestos, which has many positive qualities:

• Resistance to corrosion damage;
• Ability to use at 130 0 C;
• acceptable cost;
• low percentage of heat loss;
• Easy installation.

But with all the presence of the positive aspects, there are also negative - namely, the fragility.

As for bimetallic tubes, they consist of steel coated with other metals having anti-corrosion properties.The thickness of this layer sometimes reaches up to 15-20% of the thickness of the pipe itself.The advantages of such pipes are:

• resistance to corrosion;
• durability;
• Low heat loss.

main disadvantage is a fairly high cost.

modern construction markets offer a huge selection of insulating materials to reduce heat losses in heating communications.

And two types of insulation used today:

• compacted into polymer fiberglass or mineral wool.Use this option more for outdoor heating systems;
• pipe with a polymer layer, yet embedded therein during manufacture.

The heating systems are also used tube of steel coated with zinc.But this is only possible if the water temperature rises above 70 degrees.

The most popular are cast iron pipes for the heating network equipment.Their unusual globular structure provides high durability and long service life.In addition, they are quite cheap.

However, their high coefficient of thermal conductivity was their great disadvantage.