Question

Using the law of thermodynamics and efficiency in energy conversions, describe in detail how to MEASURE THE EFFICIENCY OF A THERMAL DEVICE. pleaseee help :( the last and only question i dont get. ill appreciate the help

Answer 1

Efficiency is simply stated as "the ratio of what we get to what we pay for."\[\eta = {E_{out} \over E_{i n}}\]A thermal device can be considered to be anything that accepts thermal energy and produces work, ie a heat engine, or uses work to move thermal energy, ie a heat pump.


Let's consider a heat engine. A heat engine uses thermal energy (or heat) to produce work. If we could measure the heat input (or knew the heat input) and could measure the work output, the efficiency could be expressed as\[\eta = {W_{out} \over Q_{i n}}\]

Answer 2

OMG thankyou very much. thats what i thought as well but i wasnt very sure of it. thankyou

Answer 3

You're very welcome!