Terminal velocity ….…. Don’t let it kill your heat exchanger!

Ensuring the correct velocity of cooling medium through the heat exchanger is vital to the long term health of the unit. Get it wrong and results could be terminal.

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…

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…

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…