Product Description:

The heat pipe waste heat boiler is a specialized energy-saving product designed specifically for the recovery of flue gas waste heat in power generation units. Due to the limited reserves of coal, oil, and natural gas resources in the world, there is a shortage of energy. Countries are committed to developing new energy and actively carrying out waste heat recovery and energy conservation work. Waste heat recovery is an important way to save energy and improve energy utilization efficiency. As a new type of heat exchanger, heat pipe heat exchanger has the advantages of high heat transfer efficiency, wide applicable heat transfer range, and reliable operation compared to conventional heat exchangers. It has attracted increasing attention in the field of waste heat utilization. The performance of heat pipes directly affects the operation of heat exchange equipment, and the study of heat pipe performance and manufacturing processes is of great significance.

Product features:

A typical heat pipe consists of a shell, a suction core, and an end cap. The inside of the heat pipe is drawn into a negative pressure of 1.3 × (10-1~10-4) Pa and filled with an appropriate amount of working liquid, so that the capillary porous material of the suction core tightly attached to the inner wall of the pipe is filled with liquid and sealed. One end of the tube is the evaporation section (heating section), and the other end is the condensation section (cooling section). According to application needs, an insulation section can be arranged in the middle of both ends. When the heating end of the heat pipe is heated, the liquid in the capillary core evaporates and vaporizes, and the steam flows towards the condensation section under a small pressure difference. The steam condenses into liquid when cooled, and the liquid flows back to the evaporation section by the capillary force or gravity of the porous material. This cycle continues endlessly, with heat transferred from one end of the heat pipe to the other.

Product advantages:

A heat pipe is a heat transfer element that relies on its internal working fluid to change and achieve heat transfer. It has the following basic characteristics:

(1) High thermal conductivity
The interior of the heat pipe mainly relies on the gas liquid phase change heat transfer of the working liquid, with low thermal resistance and high thermal conductivity.
(2) Excellent isothermal properties
The steam inside the heat pipe cavity is in a saturated state, and the pressure of saturated steam is determined by the saturation temperature. The pressure drop and temperature drop generated by the flow of saturated steam from the evaporation stage to the condensation stage are very small, so the heat pipe has excellent isothermal properties.
(3) The variability of heat flux density allows heat pipes to independently change the heating area of the evaporation or cooling section, that is, to input heat with a smaller heating area and output heat with a larger cooling area, or to input heat with a larger heat transfer area and output heat with a smaller cooling area. This can change the heat flux density and solve some heat transfer problems that are difficult to solve by other methods.
(4) The reversibility of heat flow direction: A horizontally placed core heat pipe, due to its internal circulation force being capillary force, can be used as an evaporation section at either end when heated, while the other end dissipates heat outward and becomes a condensation section.
(5) Thermal diode and thermal switch performance: Heat pipes can be made into thermal diodes or thermal switches. A thermal diode only allows heat flow in one direction and not in the opposite direction; A heat switch is used when the temperature of the heat source is higher than a certain temperature, and the heat pipe starts working. When the temperature of the heat source is lower than this temperature, the heat pipe does not transfer heat.
(6) Constant temperature characteristic (controllable heat pipe): The thermal resistance of each part of a regular heat pipe basically does not change with the amount of heat added, so when the amount of heat added changes, the temperature of each part of the heat pipe also changes accordingly. But people have developed another type of heat pipe - variable heat transfer pipe, which reduces the thermal resistance of the condensation section with the increase of heating amount and increases with the decrease of heating amount. This can make the steam temperature change extremely small in the case of significant changes in heating amount, achieving temperature control. This is the isothermal characteristic of heat pipes.
(7) The shape of the adaptive heat pipe for the environment can vary with the conditions of the heat source and cold source. The heat pipe can be made into the shaft of an electric motor, the blades of a gas turbine, a drill bit, a surgical knife, etc. The heat pipe can also be made into a separate type to adapt to heat transfer over long distances or when cold and hot fluids cannot be mixed; Heat pipes can be used both on the ground (gravity field) and in space (no gravity field).



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