Hey guys(adsbygoogle = window.adsbygoogle || []).push({});

I'm BRAND SPANKING new to posting anything an any forum ever...this is a last resort at the end of much research, brainstorming and desperate googling...

My problem:

We've built a transformer tank to house the core and this will be filled with oil, a radiator was built as well - I have to do thermal prediction calculations and am at a complete loss...

I now have to calculate:

At a known flow-rate of forced oil through the radiator, and a known volume of air forced over the radiator - What delta T can be expected between oil entering the radiator and oil leaving the radiator

I can measure/obtain the following parameters:

1. Surface area of radiator fins - individual and cumulative.

2. Thermal conductivity of fin material, air and oil.

3. Specific heat capacity of fin material, air and oil.

4. Ambient temperature of forced air.

5. Flow-rates of both oil and air.

6. kVA Output of the transformer

7. I^{2}R Losses of transformer

8. Desired steady state temperature of oil therefore also the maximum allowable delta-T

Is there a way by using these parameters as well as others needed that I may not have thought of to calculate the Delta-T of oil through the radiator ?

Help would be GREATLY appreciated

Greetings from South Africa

Izak Nel

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# Transformer Radiator Design and Calculations

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