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A heat pipe consists of a sealed metal tube from which non-condensable gases have been removed, and it is filled with a certain amount of a working fluid. The working fluid absorbs heat at the hot end and boils to vaporize; the resulting steam flows to the cold end where it condenses, releasing latent heat. The condensed liquid returns to the hot end to boil and vaporize again. This cycle repeats continuously, with heat being transferred from the hot end to the cold end. The advantages of heat pipe exchangers are: ◆ Simple structure, long service life, and reliable operation ； ◆ Possesses extremely high thermal conductivity and good isothermality ； ◆ The heat transfer areas on the hot and cold sides can be adjusted arbitrarily, heat transfer can occur over long distances, and the temperature can be controlled. Its disadvantages are: ◆ Poor antioxidant and high-temperature resistance. Precautions for using heat exchangers: ◆ Keep the piping system clean. The pipeline network must be cleaned both before and after operation to prevent blockages in the heat exchangers. In addition, attention should be paid to cleaning the dirt removers and filters to ensure the smooth completion of the heat exchange process. ◆ Strictly control the softened water. Before treating the heating medium, it is necessary to check the water quality in the neutralization and softening tanks within the system; only after confirming that the water quality is satisfactory can it be introduced. ◆ Test the new system. For new systems, they cannot be used alternately with the heat exchanger right away; instead, the new system must operate for a specified period of time, and only after completion of the operational tests can the heat exchanger be integrated into the system. The purpose of doing this is to prevent impurities in the pipeline system from damaging the internal components of the heat exchanger.