Shell and tube heat exchangers consist of a series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required. A set of tubes is called the tube bundle and can be made up of several types of tubes: plain, longitudinally finned, etc. Shell and tube heat exchangers are typically used for high-pressure applications (with pressures greater than 30 bar and temperatures greater than 260°C). This is because the shell and tube heat exchangers are robust due to their shape.
Features
1. Tube diameter: Using a small tube diameter makes the heat exchanger both economical and compact. However, it is more likely for the heat exchanger to foul up faster and the small size makes mechanical cleaning of the fouling difficult.
2. Tube thickness: The thickness of the wall of the tubes is usually determined to ensure:
a. There is enough room for corrosion
b. That flow-induced vibration has resistance
c. Axial strength
d. Availability of spare parts
e. Hoop strength (to withstand internal tube pressure)
f. Buckling strength (to withstand overpressure in the shell)
3. Tube length: heat exchangers are usually cheaper when they have a smaller shell diameter and a long tube length. Thus, typically there is an aim to make the heat exchanger as long as physically possible whilst not exceeding production capabilities.
4. Tube pitch: when designing the tubes, it is practical to ensure that the tube pitch (i.e., the centre-centre distance of adjoining tubes) is not less than 1.25 times the tubes' outside diameter.
5. Tube corrugation: this type of tubes, mainly used for the inner tubes, increases the turbulence of the fluids and the effect is very important in the heat transfer giving a better performance
.
At present,floating coil heat exchanger is the new product improved on the basis of former products. Now it has been the Generation VI Product by our continued optimizing and improving. Because we use the smaller heat transfer component, it has tight structure and reasonable layout The moreover, the decrease of outer size has solved the problem short flow caused by uneven flow velocity on the circular cross-section of former shell side, therefore its potential functions of high heat transfer coefficient K and stable thermostatic water supply can be brought into to the full play.
The managerial principle of our company is “Quality First, User First”. We break constant policy, and constantly update the design plan to make the best better, we always try our best to win over the user and market by perfect quality and functions in order to expand and develop our company.
The floating coil heat exchanger can be widely used in the supply system of heating,air conditioning and domestic hot water in the industrial and civil buildings just like hotels,restaurants,organs,schools,hospitals,laundries,factories and so on.
Pressure vessel : storage tank for storing oil, fuel, diesel, nitrogen, natural gas tank, air tank, water tank , LPG tank , expansion tank/vessel.
The capacity is above 800L to 200 000L.
The pressure range is 0.1Mpa—10Mpa
The material is carbon steel and stainless steel 304,304L,316,316L.
The storage can store various medium like oil,gas,water…
The drawing is designed by us according to customers’ requirements.
Pressure vessel : storage tank for storing oil, fuel, diesel, nitrogen, natural gas tank, air tank, water tank , LPG tank , expansion tank/vessel.
The capacity is above 800L to 200 000L.
The pressure range is 0.1Mpa—10Mpa
The material is carbon steel and stainless steel 304,304L,316,316L.
The storage can store various medium like oil,gas,water…
The drawing is designed by us according to customers’ requirements.
