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Testing radiators for heat dissipation

chris@highpowermedia.com

There are a number of ways to evaluate the heat dissipation performance of a radiator. Some might prefer a computational approach using one of the many CFD codes available to model heat fluxes and fluid flows. However, since the geometry of a radiator is complex, requiring large amounts of computing power and detailed knowledge of how to use the software, this might be the least preferred approach, except by the CFD specialist with a suitable budget and the desire to get down into the...

Aerodynamics and the cooling system

chris@highpowermedia.com
The number one requirement of any cooling system is that it should be effective. By that I mean keeping the engine operating at its optimum working temperature for best overall performance, aligned to acceptable durability. At one time this was considered all that was needed, but vehicle manufacturers soon realised that while the pump used to circulate the coolant through the system absorbed useful engine power, the aerodynamic drag associated with the vehicle radiator (positioned as it...

The plastic intercooler

chris@highpowermedia.com
Modern engine intake air intercoolers are almost exclusively made from aluminium alloy. However, although aluminium has been chosen for its ability to dissipate heat efficiently rather than any other quality, this apparently unassailable characteristic is now being challenged. Strangely enough, this challenge is coming from the solar panel industry, where not only is the efficiency of heat transfer critical but also components have to last for 25 years or more. In the automotive world the...

Hosing for posing

chris@highpowermedia.com
Over the years, many automotive parts have been made from rubber. Initially made from the latex of the rubber tree, the security of supply and the vast amounts needed during the 1920s and ’30s encouraged the development of synthetic alternatives. So while cooling system hoses may once have been made from any number of synthetic rubbers, these days they are restricted to more or less only two – ethylene propylene diene monomer (EPDM) and silicone. EPDM is the product preferred for...

Back to basics

chris@highpowermedia.com
When it comes to competition cars, more cases of overheating are caused by the installation of the vehicle heat exchanger than the choice of the heat exchanger itself. In such cases the cause of the problem is not in the selection of the matrix core or its size but in the way the unit is installed in the vehicle and the efficiency at which it gives up its heat to the passing air. It’s easy to determine the heat rejection of an engine: simply measure the temperature of the coolant going...
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