The radiator is the main component of the liquid cooling circuit of kart engines and is therefore an accessory that plays a crucial role both for the performance and reliability of engines. Precisely for this reason, in the articles "Technique - The radiator" and "Technique - Cylinder cooling" TKART revealed everything there is to know about its operation and which parameters and variables affect it the most. To try, however, to really dispel all the doubts that most kart drivers have on their minds, we turned to PWR (Paul Weel Radiators), an Australian company specialised in the production of cooling systems for motorsport, partner of Formula 1, Indycar and WEC. Our choice fell specifically on a company outside the world of karting in order to obtain "impartial" answers. PWR Europe's European technical team answered 6 questions/doubts that all kart drivers ask themselves sooner or later. Here they are:
1. THE FRONT AREA OF THE RADIATOR IS THE ONLY FACTOR THAT DETERMINES COOLING
2. ALUMINIUM IS THE BEST MATERIAL FOR RADIATORS BECAUSE IT EXCHANGES HEAT BETTER
3. AT THE SAME VOLUME, HAVING A THICK AND NARROW RADIANT MASS OR A THIN AND WIDE MASS IS THE SAME THING
4. THERE ARE FEWER FINS ON KART RADIATORS THAN CARS, BECAUSE THE SPEEDS ARE LOWER
5. THE HEAT EXCHANGE OF THE RADIATOR DECREASES IF THE CIRCUIT IS SLOW
6. WATER PRESSURE AFFECTS THE PERFORMANCE OF RADIATORS
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THE FRONT AREA OF THE RADIATOR IS THE ONLY FACTOR THAT DETERMINES COOLING
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Reply by
Technical team of PWR Europe
A company specialised in the supply of cooling systems for motorsport.
true
false
Well done!
Wrong!
The frontal area of the radiant mass is certainly a fundamental factor in thermal performance, but there are also other variables that can affect the dissipation of heat. In fact, the maximum possible heat dispersion can be affected both by the operating conditions of the radiator, i.e. the temperature and flow rate of the coolant, and by environmental factors, such as the air temperature, and, finally, by the different speeds that a kart reaches during its activity on the track. Therefore, there are many aspects to take into consideration to maximise the efficiency of a radiator in relation to the contingent conditions of use. A few examples? The geometry of the tubes and fins, the area of the radiant mass and its thickness, the design of the trays and the flow path of the coolant (water for karts). All these factors, and the way in which they interact with each other, play an important role in the performance of the radiator (precisely on these aspects TKART has focused in the article "Technical track test - Kart radiators: with the same surface, how important is the type of radiant mass? ", editor’s note).
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