Vipertex® & HTRI®

Vipertex® and HTRI® have developed a design interface for members' use that allows HTRI® Xchanger Suite software to perform designs utilizing Vipertex® tubes. HTRI® software products are widely recognized as the industry standard for the design, rating, and simulation of heat transfer equipment. Using the Vipertex® design interface with the HTRI® software, several manufacturers have been able to calculate a significant reduct in the number of tubes used as well as increased efficiency using Vipertex® tubes.

HTRI® members can access the Vipertex® HTRI® Xchanger Suite interface upon request. The Vipertex® HTRI® interface is currently available by calling 877.360.9716.

HTRI® Test Data

Vipertex® model 1EHT tubes provide a more than 500% increase in heat transfer, which is accompanied by only a small increase in the friction factor (Fig 1).

Fig. 1

Vipertex® Model 1EHT - Two Phase Bundle Data - Outside

Vipertex® model 1EHT tubes produce combined overall bundle performance increasing shellside and tubeside heat transfer. Enhanced surfaces with cavities on the surface promote nucleate boiling and reduce the required wall superheat for nucleate boiling to occur (Fig 2).

Fig. 2

Tubeside Evaporation Results for Smooth, Vipertex® Model 1EHT and Vipertex® Model HB/EHT Tubes

Evaporation performance has been evaluated for a variety of tube sizes with several different refrigerants. In this example, the Vipertex® model 1EHT tube produced 1.4 times the performance of smooth tubes (Fig 3).

Fig. 3

Tubeside Condensation Results for Smooth, Vipertex® Model 1EHT and Vipertex® Model HB/EHT Tubes

Condensation performance has been evaluated for a variety of tube sizes with several different refrigerants. In this example, the Vipertex® model 1EHT tube is twice the performance of smooth tubes (Fig 4).

Fig. 4

Evaporation of R22 and R410a on the Outside of Vipertex® Model 1EHT Tube

Evaporation performance has been evaluated for a variety of tube sizes with several different refrigerants. In this example, the Vipertex® model 1EHT tube is up to 4.4 times the performance of smooth tubes (Fig 5).

Fig. 5

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