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Six Common Questions About Heat Exchanger Knowledge!
How does the heat exchanger work?
Answer: on the basis of Zhcooler Heat Exchangers Co., LTD main products, aluminum plate-fin Heat exchanger, its working principle is a partition, fin, and seals and other components of a unit cell, these in series with the unit cell can according to customer demand, complexes of different sizes, let medium through combination of imported into, and then from exports. For example, the air and water of the compressor go all the way, and the water absorbs some of the heat from the hot air, reducing it to cool.
What is the effect of dielectric velocity on heat exchange?
Answer:the higher the velocity of the medium in the heat exchanger, the greater the heat transfer coefficient. So increase the flow rate of the medium inside the heat exchanger can greatly improve the effect of heat transfer, but the negative effects of increased flow velocity is increased pressure drop through the heat exchanger, increased the energy consumption of the pump, so it is certain to should have the appropriate range.
What is the effect of heat transfer on the surface structure of the heat exchange tube?
Answer: the use of special design of the surface of the heat exchange tube structure, such as fin tube, nail head pipe, threaded pipe, etc, on the one hand, increase the heat transfer area, on the other hand disturbed flow on the surface of the special role greatly increases the fluid turbulence level outside the tube, both can improve the effect of the overall heat transfer in a heat exchanger, so the surface structure than the light tube surface performance.
What are the common methods used to remove dirt from heat transfer tubes?
Answer: the common method of descaling surface of heat exchanger tube is:
Mechanical descaling: the steel brazing, the pressure water and the chemical removal.
What are the methods for surface protection of heat exchanger tube?
Answer: (1) nickel phosphorus plating
(2) chemical coating, 847 coatings
What are the common methods for strengthening heat transfer equipment?
Answer: the main method of strengthening heat transfer of heat transfer equipment is to adopt the structure of increasing heat transfer surface, such as:
(1) finned tube, head tube, thread pipe, corrugated pipe etc
(2) the surface of the tube is machined: the spiral tube, spiral tube, thread pipe and so on
(3) using small tube diameter pipe, it can increase the number of tubes in the same tube area and increase the heat transfer area
The second is to increase the flow rate of the fluid in the heat exchanger, which can greatly improve the heat transfer coefficient, such as:
(1) the addition of the disturbance flow, such as inserting a spiral belt in the tube, the outside of the tube, and the false pipe, etc.
(2) increase the number of tubes or shells.
In addition, with good performance of thermal conductivity of materials to make heat exchanger, heat exchanger anticorrosion anti-scaling measures, timely cleaning scales are means to improve the effect of heat transfer.