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
Oval Twisted Shell Tube Heat Exchanger Customised Design -20 C Up To 900 C
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.
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.
Fig. 2-1 Flow mechanism in tube
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
Oval Twisted Shell Tube Heat Exchanger Customised Design -20 C Up To 900 C Images |