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Webinar Abstracts

We are proud to have broadcast a very well-received range of heat transfer related webinars since 2016

Debottlenecking Underperforming Heat Exchangers

Presented by Tom Higley

This webinar will look at understanding how to increase plant throughput with minimal capital expenditure.

It will explore the challenges, how to troubleshoot, the solutions and the results through a detailed case study on a viscous product heater. It also looks at debottlenecking with two phase applications.

Principles of Single Phase Heat Transfer in Round Tubes

Presented by Dr Peter Drögemüller

This webinar will cover the different mechanism of single phase heat transfer associated with the different flow regimes inside round tubes. The discussion will focus on heat transfer in laminar and transitional flow, which can be governed by forced or so called mixed convection. Mixed convection heat transfer, where natural convection effects are superimposed to forced convection flow, are highly complex and difficult to be correlated. Under those conditions thermal flow stratification with possible in-tube temperature pinch are observed.

Measurement results, backed up with computational flow simulations (CFD) will be presented and will give a good understanding about the underlying mechanisms and uncertainties in such flow conditions.

This webinar will form the basis for subsequent webinars on the use of hiTRAN® tube side enhancement technologies.

Part 2: Principles of Single Phase Heat Transfer in Round Tubes: Applications and Flow Maps

Presented by Dr Peter Drögemüller

In part one of this webinar topic we discussed the fundamentals of single phase heat transfer in round tubes, with focus on laminar flow. In the upcoming webinar we want to apply this knowledge to discuss different case studies. The case studies will reflect exchangers operating in forced or mixed convection regime. Laminar flow conditions evaluated will range from high viscous polymer exchanger in forced convection flow to slow flowing low viscous fluids in temperature cross situations. Using flow maps, the characteristics are identified and explained with the help of CFD simulations. We will also discuss different reasons, which drives the heat exchanger design towards laminar fluid allocations on the tube side.

hiTRAN® Heat Transfer Enhancement in Single Phase Flow

Presented by Dr Peter Drögemüller

In this webinar we will explain how hiTRAN Thermal Systems changes the hydrodynamics in tube flow. This is demonstrated using dye stream and sophisticated laser measurement techniques. The change in hydrodynamic has profound implications on the tube side heat transfer. Especially in laminar flow double figure increases in tube side heat transfer are possible. Measured data and CFD simulations are used to back up the findings.

During the webinar we will explain how to design hiTRAN enhanced exchangers without pressure drop penalty, but much increased heat transfer.

Cooling Viscous Liquids

Presented by Ian Gibbard

Panelist: Peter Ellerby - Engineering Manager

The challenges involved in the cooling of viscous liquids will be addressed. Achieving turbulent flow is unrealistic with fluids of even moderate viscosity, and this leads to a range of practical problems in heat exchanger design. Where the viscous fluid is being cooled these challenges are particularly difficult.

The webinar will examine these limitations and evaluate the various strategies available to overcome them. Practical examples will be used to compare the effectiveness of these strategies for typical applications.

Cooling Near a Pour Point

Presented by Ian Gibbard

Panelist: Peter Ellerby - Engineering Manager

In this webinar the challenges involved in the cooling of liquids near to their pour points will be addressed. This issue typically arises when cooling hydrocarbon mixtures containing high-molecular weight components. If the mixture is cooled too aggressively, solid material may form on the heat transfer surface and the flow resistance will increase significantly. Flow through the heat exchanger may cease altogether. In order to avoid operational difficulties, heat exchangers must be specifically designed to address this issue. The webinar will define the problem, discuss possible solutions and use examples to compare the results of the various strategies available.

Heat Recovery

Presented by Ian Gibbard

Panelists: Peter Ellerby - Engineerting Manager & Tom Higley - Sales & Business Development Manager

In this webinar the challenges involved in the design of heat exchangers for heat recovery duties will be addressed. Many processes depend on heat recovery to minimise fuel consumption and therefore be competitive. The successful design of heat exchangers for heat recovery duties requires the effective use of the available temperature and pressure driving forces, which must be balanced against practical issues such as mechanical design and maintenance. The webinar will define the problem, discuss possible solutions and use examples to compare the results of the various strategies available.

Total Vaporisation

Presented by Ian Gibbard

Panelists: Peter Ellerby - Engineering Manager & Dr Peter Drögemüller - R&D Manager

In this webinar, the challenges involved in the design of vaporisers will be addressed. A vaporiser is typically required to take a sub-cooled liquid feed and covert it to a superheated vapour. There are a number of potential difficulties associated with such a process, and many heat exchangers of this type fail to perform as expected. The webinar will define the problem, discuss possible solutions and use examples to compare the results of the various strategies available.

Boiling with a Low Delta T

Presented by Ian Gibbard

Panelist: Dr Peter Drögemüller - R&D Manager

In this webinar, the challenges involved in boiling fluids at low temperature driving forces will be addressed. Boiling heat transfer is complex and strongly affected by the temperature of the heat transfer surface. Opportunities exist to use enhancement to obtain efficient and reliable heat exchanger designs.

The webinar will define the problem, discuss possible solutions and use examples to compare the results of the various strategies available.

hiTRAN®.SP Software Integration in HTRI Xchanger Suite®

Presented by Dr Peter Drögemüller

In this webinar the integration from our hiTRAN.SP software into HTRI Xchanger Suite is demonstrated. We will show how to identify suitable applications for hiTRAN Thermal Systems using the hiTRAN optimisation panel. Starting from an empty tube design we will be demonstrating, step by step, how the exchanger size can be reduced using hiTRAN enhancement. It is also shown in a HTRI / hiTRAN.SP case study how the technology can be used to retrofit existing exchangers to improve the performance. The difference between hiTRAN insert optimisation in rating mode and simulation calculations are explained.

Advanced Software Tools to Capture Heat Exchanger Cost Savings

Presented by Nathan Hill

In this webinar, we will discuss the process of designing of a heat exchanger to use heat transfer enhancement technology.

We will then look at the estimation and comparison of the costs between a normal & enhanced design to justify considering enhancement.

hiTRAN® Thermal Systems in tube side condensing processes

Presented by Dr Peter Drögemüller

In this webinar, we explain in detail the changes in hydrodynamic in vertical and also horizontal condensers when applying hiTRAN. With the use of flow maps we will show in detail how the flow and therefore also the heat and mass transfer is altered when use hiTRAN technology. During the webinar we will give guidelines which variables are important to determine whether hiTRAN installation will be beneficial. Industrial case studies are presented where hiTRAN Thermal Systems was used to increase the performance.

Using the Power of CFD to Solve Engineering Problems

Presented by William Osley

We will be covering the following topics in this webinar. First, we will look at an overview of how CFD works, where we have used it and what information you can get out of it. Then we will look at a CFD investigate we carried out into Air Cooled heat exchangers.

And finally, a case study about an underperforming ACHE that builds on the observations we found from our ACHE investigation.

Heat Exchangers for Batch Reactors

Presented by Ian Gibbard

Panelist: Tom Higley - Sales & Business Development Manager

In this session, the challenges involved in the heating and cooling of batch reactors will be explained. Most reactors require the facility to add and/or remove heat during the batch cycle, and the more efficiently this can be achieved the better.

External jackets or internal coils may be sufficient for small reactors or modest heat loads, but in many cases, an external heat exchanger will be required. Although such heat exchangers are relatively simple, the geometric constraints placed on the layout can make their design challenging. An example will be used to demonstrate how effective design can be achieved.

A Comparison of hiTRAN® Thermal Systems and Twisted Tapes

Presented by Peter Ellerby

hiTRAN Thermal Systems and Twisted Tapes are both tube side established heat transfer enhancement devices, which are often specified for similar services. This webinar will look at each device’s geometry and how it produces its enhancement effect.

From this fundamental understanding, and a comparison of performance data, the results from the application of this data in practical cases, across a range of flow regimes, will follow.

From the explanations in the case studies, we will answer the question of which type is most suitable for selected flow regimes or applications, and discuss the practical differences relating to the installation of the chosen device type.

Heat Exchanger Reactors

Presented by Ian Gibbard

Panelist: Dr Peter Drögemüller - R&D Manager

In this session the challenges involved in the design of heat exchanger reactors will be addressed. Simultaneous heat transfer and chemical reaction is often desirable when the reaction is exothermic, in order to maintain the optimal temperature of the reaction mixture. However, designing a heat exchanger for chemical reaction service is far more complex than for heat transfer alone. The webinar will identify the additional factors to be considered and discuss some potential solutions.

Single Phase Flow Maldistribution in Heat Exchangers

Presented by Ian Gibbard

In this session, the challenges dealing with single phase maldistribution in heat exchangers will be investigated. The topics covered include the general effects of maldistribution (heat transfer coefficient, temperature driving force, fouling etc.), manifold maldistribution, the effect of maldistribution by exchanger type (ACHE, STHE and PFHE) and common problems and their solutions.

Improved Economics & Plant Operability by Enhancing Heat Exchanger Performance

Presented by Tom Higley & Martin Gough

De-bottlenecking activities where operators of plants can process more product through units within the same plot space and existing heat exchangers, save both capital and operating costs, improving plant economics with short payback times. Secondly, an equally important benefit gained from improved heat exchanger performance is reduced energy consumption when heating or cooling of process streams contributing to greener production.

Examples of retrofits and the corresponding detailed analysis will be shown, supported by the focussed research behind CALGAVIN’s products and process warranties.

Peter Ellerby - Engineering Manager

CFD & Single Phase Maldistribution in Heat Exchangers

Presented by Peter Ellerby & Will Osley

This session is a follow on from the previous webinar about single phase maldistribution in heat exchangers. Some of the issues raised relating to shell and tube exchangers will be looked at in greater detail by focusing on a single example. In particular, the cause of poor distribution will be investigated, looking at the effect of certain geometry options. The effect of distribution on performance will be investigated, and options for improving distribution will be assessed. As an integral part of the presentation, CFD will be used to analyse and illustrate the distribution.