Efficiency of Machines #2

Question	Answer
Why are somethings called wasted heat?	Because they can't be used for anything useful
What is useful energy?	Concentrated energy
Can 'waste' energy ever be useful?	Yes
What happens when a device produces inefficient heat energy?	The heat is transferred to cooler surroundings, which then become warmer. As the heat is transferred the energy becomes less concentrated
What do heat exchangers do?	Reduce the amount of heat energy that is 'lost'
Can waste energy ever be useful?	Yes
How do heat exchangers work?	By pumping a cool fluid through the escaping heat. The temperature of this fluid rises as it gets heat energy.
What is the end result of a heat exchanger?	The heat energy ion the fluid can be converted into a form of useful energy- either in the original device or in another

Resource summary

	Created by Adam Collinge about 10 years ago