The steam heater uses steel-aluminum composite finned tubes as the main heat exchanger component. Due to the use of advanced composite technology, there is basically no contact thermal resistance at temperatures below 210 degrees inside the tube. The steam heater combines the pressure resistance of steel pipes with the high thermal conductivity of aluminum, resulting in excellent heat transfer performance, while also avoiding direct contact between the steel pipe and air, effectively improving corrosion resistance. Since the fins are wrinkle-free, the air resistance is lower than that of coiled types. The steam heater products also have advantages such as being less prone to water accumulation, easy to clean, compact structure, and large unit heat transfer area.
The shell-and-tube heat exchanger consists of components such as the shell, heat transfer tube bundle, tube sheets, baffles, and tube boxes. The shell is usually cylindrical, with the tube bundle installed inside, and the ends of the tube bundle fixed to the tube sheets. The two fluids involved in heat exchange are the hot and cold fluids, with one flowing inside the tubes, referred to as the tube-side fluid, and the other flowing outside the tubes, referred to as the shell-side fluid. To enhance the heat transfer coefficient of the shell-side fluid, several baffles are typically installed inside the shell. The baffles can increase the velocity of the shell-side fluid, forcing it to pass transversely through the tube bundle multiple times along a specified path, thereby enhancing the turbulence of the fluid. The heat transfer tubes can be arranged in an equilateral triangle or square pattern on the tube sheets. The equilateral triangle arrangement is more compact, resulting in higher turbulence of the shell-side fluid and a greater heat transfer coefficient; the square arrangement, on the other hand, facilitates easier cleaning of the shell-side and is suitable for fluids that are prone to scaling.
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