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Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Shanghai Marine Diesel Engine Research Institute

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Brand Name : QIYAO

Model Number : QYT series

Certification : ISO, ASME

Place of Origin : China

MOQ : 1 unit

Price : Customized Product, Quoted Case By Case

Payment Terms : T/T, L/C

Supply Ability : 100 units per month

Delivery Time : 30-45 days after T/T or L/C

Packaging Details : Seaworthy wooden case

Material : Stainless Steel, SMO, Titanium, etc.

Core structure of heat transfer : Oval twisted tubes arranged properly

High design pressure : up to 20Mpa

Wide temperature range : -20 C up to 900 C

Customised design : Available

After-sale service : Available

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Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Based on the traditional tube & shell heat exchanger, the Twisted Tube Heat Exchanger replaces the plain straight tubes with oval twisted tubes as the heat transfer components. The cross section along the length direction forms an oval spiral channel so that complicated flow featured by rotation of the fluid is caused to produce strong rotating turbulence. Tubes at shell side of the heat exchanger are supported by contacts at long axis of neighboring tubes (as fig.1-1), which eliminates the necessity of baffle plate and enables compact arrangement of tubes in the shell. In this way, it reduces the size and weight of heat exchanger and overcome the vibration of heat transfer tubes.

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Work Principle / flow

The spiral channel causes longitudinal rotation and secondary swirl of fluid when the fluid flows through, and such swirl intensifies the turbulence, reduces the boundary layer of heat transfer and improves the mixing of fluid. Accordingly, the improved mixing maintains higher temperature gradient near the tube wall and results in higher Nu value and thus greatly increases coefficient of heat transfer.

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Fig. 2-1 Flow mechanism in tube

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Fig. 2-2 Flow mechanism at shell side

Specification

Equipment Twisted Tube Heat Exchanger
QYT16, QYT20, QYT25, QYT32
304, 316L, SMO, Ti
Manufacture code / standard NB/T47007. GB150
Design code / standard NB/T47007. GB150
Design pressure F.V. – 20Mpa
Design temperature -20 - 900℃
Main test point Fluid inlet / outlet temperature & pressure
Seal
Service life of critical component 15 years
Availability of spare parts Long term
Warranty period 12 months
Work / service scope Design, fabrication and installation supervision

Advantages

  1. Low pressure drop.
  2. High heat transfer efficiency.
  3. Reduced fouling.
  4. No dead zone of flow, hard to block up.
  5. Capable of overcoming induced vibration, improved reliability.
  6. Advanced calculation software for reliable and reasonable design.
  7. Rich fabrication experience for safe and reliable product.
  8. Sufficient stock for quick delivery.
  9. Efficient management for lower cost.

Workshop

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service

Customised Twisted Shell Tube Heat Exchanger Design With Excellent Service


Product Tags:

twisted tube heat exchanger

      

multi tube heat exchanger

      
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