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304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

Product Details:

Place of Origin: CHINA
Brand Name: QIYAO
Certification: ISO
Model Number: QYT series

Payment & Shipping Terms:

Minimum Order Quantity: 1 unit
Price: Customized Product, Quoted Case By Case
Packaging Details: Seaworthy packing
Delivery Time: 4~6 months
Payment Terms: L/C, T/T
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Detailed Product Description
Structure: Twisted Tube Core Inside A Steel Casing Material: 304, 316L, SMO, Ti
Function: Improved Efficiency Of Heat Exchange Advantage: Low Foulding, No Dead Zone, Hard To Block
Warranty: 12 Months Since Operation Or 18 Months Since Delivery
High Light:

twisted tube heat exchanger

,

multi tube heat exchanger

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

 

Twisted tube heat exchanger

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. 

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

Fig. 1-1 Cross section of twisted tube

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

Fig. 1-2 Core of twisted tube heat exchanger

 

II 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.

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

Fig. 2-1 Flow mechanism in tube

Owing to the centrifugal force, the fluid at shell side changes the velocity & direction periodically so as to enhance the longitudinal mixing. In addition, the shell-side fluid flowing through the contact point at the spiral line of neighboring tube produces wake flow detaching from the tube, which enhances the turbulence, destructs the fluid boundary layer on the tube wall and improves the heat transfer at shell side.

304 316L Oval Twisted Shell Tube Heat Exchanger With Enhanced Turbulence

Fig. 2-2 Flow mechanism in shell side

 

III Specification

Model

QYT16, QYT20, QYT25, QYT32

Material

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

Flange

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

 

IV Advantages

---Low pressure drop.

---High heat transfer efficiency.

---Reduced fouling.

---No dead zone of flow, hard to block up.

---Capable of overcoming induced vibration, improved reliability.

---Advanced calculation software for reliable and reasonable design.

---Rich fabrication experience for safe and reliable product.

---Sufficient stock for quick delivery.

---Efficient management for lower cost.

Contact Details
Shanghai Marine Diesel Engine Research Institute

Contact Person: Mrs. Tan Ling

Tel: 86-21-51151156

Fax: 86-21-51711742

Send your inquiry directly to us (0 / 3000)

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