Asteam engine (assume a carnot engine ) has an efficiency of 50.8%. if the waste heat has a temperature of 72.4 ◦c, what is the temperature of the boiler? answer in units of ◦c.

The temperature of the boiler is approximately 147.1 °C

Explanation:

A Carnot engine is an ideal engine that has the highest efficiency among all the engines because the second law of thermodynamics.That efficiency  is:

with the temperature of the hot reservoir (the boiler temperature) and the temperature of the cold reservoir (the steam temperature). Solving for :

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current