Academy Offers

AIChE members receive complimentary, unlimited access to live and on-demand AIChE webinars by purchasing them with their newly increased number of credits. See more resources.

Intensified Heat Transfer Technology – CFD Analysis to Explain How and Why IHT Increases Runlength in Commercial Furnaces

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    March 23, 2010
  • Duration:
    30 minutes
  • Skill Level:
  • PDHs:

Share This Post:

Intensified Heat Transfer Technology (IHT) is the use of radiant coil inserts that have a twisted baffle integrated with their inner surface. The inserts have the same diameter and metallurgy as the radiant coil, and are placed strategically in the coil to create turbulence in the process fluid, thus reducing the boundary layer and increasing runlength by achieving improved heat transfer. Commercial experience in more than 50 heaters – most of them cracking naphtha – has shown that runlength can be extended by a factor of 1.2 to two times the runlength of a bare coil. The main advantage of the inserts, aside from their competitive cost, is that they can be installed into new or existing heater tubes. In this paper, data from units operating with IHT will be presented. We will discuss a computational fluid dynamics (CFD) analysis that was applied to a heater coil to explain the benefit of installing IHT. The velocity and temperature profiles in the coil with and without IHT were studied and the optimum location of the inserts was evaluated. A kinetic scheme was devised to estimate the coke rate formation at the tube surface, which ultimately explains the reduction in tube metal temperature (TMT) when using IHT.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.



Do you already own this?



AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
Non-Members $25.00