Knowledge Centre

Our Knowledge Centre provides a selection of informative articles and helpful guides that are intended to give an insight into heat exchanger design and heat transfer technology.

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Recovering waste heat from a Biogas fuelled gen-set

As a fuel, Biogas has much to recommend it. It’s a renewable fuel produced by breaking down organic matter through the Anaerobic Digestion (AD) process. It  reduces the amount of waste being sent to landfill, and helps control the emission of Methane gas to the atmosphere (Methane is significantly more damaging to the environment than…

How do I heat my pool faster?

Inviting as a beautiful blue swimming pool may be, if the water’s cold, no one’s going to use it! Which kind of scuppers the whole reason for having one! So, it’s no surprise that one of the most frequently asked questions on Google is ‘How do I heat my pool faster’? The answer may be…

Terminal Velocity

The velocity (or flow rate) of the fluid that circulates through a typical shell and tube heat exchanger is extremely important. Not only can it have a direct bearing on the heat transfer efficiency of the heat exchanger, in instances where the incorrect flow rate is used, it is often the cause of premature failure…

How to heat a hot tub faster…

Every hot tub installation is different in some way, so, the answer can depend a number of issues: The capacity of the hot tub? The outside air temperature? The heating system type? In many installations, where the hot tub is being heated via an electric heater, the answer is ‘a very long time’ – in…

Recovering Waste Heat From an Engine Powered Gen-Set

In this article we look at the benefits of converting a typical reciprocating engine driven generating set into a Combined Heat & Power (CHP) system, simply by recovering ‘waste heat’ from the engine and converting it into a valuable energy source. Why recover heat from a gen-set? Every engine powered gen-set produces heat. It’s a…

What is an Exhaust Gas Heat Exchanger?

An exhaust gas heat exchanger recovers heat energy from the exhaust gases of a reciprocating diesel, gas or bio gas fuelled engine and utilises this energy to heat water, which can then be used for space or process heating, cooling, via a chiller system or generating more electricity, via an ORC system. When added to…

Is stagnant water killing your heat exchanger?

Stagnant water – who needs it? It’s smelly and unsightly in fresh water ponds, but inside your heat exchanger, it’s potentially lethal! The problem is, this ‘silent killer’ does its worst out of sight, so, unless you’re aware of the danger and take appropriate action, you may not even realise there’s a problem – until…

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What is counter flow? Why is it more efficient?

In a shell and tube heat exchanger, coolant usually flows through the central ‘tube core’ to cool hot oil, water or air, which passes over and around the tubes. The direction in which the two fluids travel through the heat exchanger can be either ‘parallel flow’ or ‘counter flow’. In this article we are looking…

Single, double or triple pass cooling – what’s the difference?

Getting the right specification for your heat exchanger can make a significant difference to the performance and life expectancy of the unit. Here we discuss the importance of single, double and triple pass cooling. Every shell and tube heat exchanger carries a flow of cooling water through its central tube core. But depending on its…