Heat Pipe Vacuum Tube

Product Description

Structure and Principle

The heat pipe is hollow with the space inside evacuated, much the same as the solar tube. In this case insulation is not the goal, but rather to alter the state of the liquid inside. Inside the heat pipe is a small quantity of purified water and some special additives. At sea level water boils at 100oC, but if you climb to the top of a mountain the boiling temperature will be less that 100oC. This is due to the difference in air pressure.

Based on this principle of water boiling at a lower temperature with decreased air pressure, by evacuating the heat pipe, we can achieve the same result. The heat pipes used in solar collectors have a boiling point of only 30oC. So when the heat pipe is heated above 30oC the water vaporizes. This vapour rapidly rises to the top of the heat pipe transferring heat. As the heat is lost at the condenser (top), the vapour condenses to form a liquid (water) and returns to the bottom of the heat pipe to once again repeat the process.

At room temperature the water forms a small ball, much like mercury does when poured out on a flat surface at room temperature. When the heat pipe is shaken, the ball of water can be heard rattling inside. Although it is just water, it sounds like a piece of metal rattling inside.

This explanation makes heat pipes sound very simple. A hollow copper pipe with a little bit of water inside, and the air sucked out! Correct, but in order to achieve this result more than 20 manufacturing procedures are required and with strict quality control.


HS Code:	8419191000
Productivity:	300, 000sets/Year
Unit Price:	US $ 0/ Piece
Shipment Terms:	FOB
Payment Terms:	L/C,T/T
Price Valid Time:	From Jul 15,2011 To Jan 15,2012
Use:	Bathroom
Pressure:	Pressurized
Circulation Type:	Indirect / Closed Loop (Active)
Heating System:	Thermosyphon (Passive)
Certification:	CE
Connection Type:	Direct-Plug
Application:	Solar Thermal
Type:	Pressurized
Pipe Material:	Copper
Export Markets:	North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Company:	Zhejiang Gaodele New Energy Co., Ltd.