Answer :
It is claimed that the efficiency of a completely reversible heat engine can be doubled by doubling the temperature of the energy source. The claim is invalid.
What is energy source?
The traditional definition of energy is the capacity of a system to perform work, but because energy can take many different forms, it is challenging to give a single, all-encompassing definition. It is a property of an object that can be changed or transferred from one object to another but cannot be created or destroyed. There are numerous sources of energy. Let's go into more detail about the various energy sources in the following sections.
Energy sources can be divided into the following categories:
- Renewable sources
- Non-Renewable Sources
Natural sources for renewable energy are plentiful and sustainable.
Natural sources that are found underground are referred to as non-renewable sources .
The efficiency in the first case is:
⇒ η1 = [tex]1 - \frac{T_L}{T_H}[/tex]
= [tex]\frac{T_H-T_L}{T_H}[/tex]
The efficiency in the first case is:
⇒ η2 = [tex]1 - \frac{T_L}{2T_H}[/tex]
= [tex]\frac{2T_H-T_L}{2T_H}[/tex]
Making a comparison we obtain:
[tex]\frac{2T_H-T_L}{2T_H}[/tex] < [tex]2 (\frac{T_H-T_L}{T_H})[/tex]
η2 < 2η1
Thus, the claim is invalid.
Learn more about energy sources
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