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…

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…

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…