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Principle: coaxial tube heat exchanger is a concentric tube with two different sizes of standard pipes. The uneven surface of the threaded tube can limit the heat.Threaded pipe can improve the efficiency of heat transfer is his uneven surface can make water and cooling medium quality at high flow state, circulating thermal resistance is overcome effectively, both inside and outside heat transfer reinforcement at the same time, and improve the heat transfer coefficient;At the same time the flow of fluid, the particles of the fluid are difficult to deposit.This structure can be characterized by compact structure, high heat transfer efficiency and anti-scale capability.Features: titanium self-contained grain tube exchanger main features: 1, high heat transfer efficiency: because of the heat exchange tube using pipe thread tube, pipe flow channel section continuous mutation, makes the fluid even in the case of low velocity is always in a highly turbulent state, it is difficult to form laminar flow, make the main thermal resistance of convection heat transfer is overcome effectively, the tube inside and outside heat transfer was enhanced at the same time, high coefficient of heat transfer, thus is often traditional titanium light tube exchanger from 2 to 3 times.2, anti-fouling ability: because of the height of the fluid turbulent flow in the runner, the fluid of the particles to deposit scale, even if there is a small amount of scale formation, due to the turbulent medium in both internal and external pipes, pipe wall, scouring anti-fouling ability enhancement.In addition, the threaded pipe inside and outside temperature difference stress and strain, the curvature of the pipe with elastic characteristics of thread microscopic changes, so that the thread tube heat exchanger has the ability of descaling and anti-scaling.3, stress compensation ability: because the thread tube because of its shape and characteristics of the thin-wall structure, inner tube and outer tube temperature and pressure is bigger, the curvature of the elastic characteristics of microscopic changes the curvature of the threaded pipe, used to compensate, to eliminate the thermal stress, effectively prevent the traditional tube heat exchanger heat transfer pipe is easy to crack.4, with compact structure, small volume, light weight, because the thread tube heat exchanger heat transfer coefficient is very high, the required heat exchange area is small, and the wall thickness is very thin thread, so the titanium threaded pipe heat exchanger in compact structure, small volume, light weight.