Help to Calculate Efficency of 16v/8000 Amps Rectifier

The thermal efficiency is the total power flowing downstream of it divided by the total power flowing upstream of it. The above data don't contain sufficient information to be able to do the calculation.

However, it does state that it is from a short circuit test. As no useful power would be dissipated to the load in this condition, it could be said that the efficiency was 0%.

"Calculating efficiency of 16V/8000Amps electroplating rectifier"

% efficiency = output/input x 100%

Well you could try measuring the volt drop across the rectifier and use ohms law to calculate the power dissipation across it and hence efficiency (assuming the load is mostly resistive).

If the volt drop is too low to measure you may find it in the datasheets or manual. Don't bother trying to measure its resistance to figure out the dissipation as this won't give you an accurate figure.

I would be surprised if the fwd diode drop was not between .7 to 2 volts - again, need data sheets and currents through devices.

thank you all for your replies.

i want to know if there is some formula to calculate killowatt required to rise the temp of transformer oil from 29ºC to 76ºC from 2.00pm to 4.30pm

Have you asked the transformer oil supplier for specifications on the oil?

You'll need that before anything else.

You'll also need all the specs of all the other parts and pieces.

I'd ask for some help from a transformer supplier, if I were you.

No.

Such a formula would need to embrace the mass of the oil, its thermal capacity and the losses from the structure.

Sorry no, you would need to refer to detailed temperature rise graphs relating to current or power dissipation (etc) and these are not commonly available with this type of product.