Efficiency of a heat engine can’t be greater than efficiency of Carnot’s engine .
Why is it not possible to have an efficiency greater than 1?
It is not possible to have an efficiency of greater than 1 or an efficiency percentage greater than 100%. This would mean that more energy is being transferred than is being supplied , which would mean that energy is being created. This would break the law of conservation of energy.
Can you have an efficiency greater than 1?
Since a machine does not contain a source of energy, nor can it store energy, from conservation of energy the power output of a machine can never be greater than its input, so the efficiency can never be greater than 1 .
Can you have an efficiency over 100?
Is there anything in nature more than 100% efficient? No, it is impossible; it comes from the energy conservation law . It stems from this law, that it is impossible to produce more energy than You put in the imput for any device and by any physical proccess.
Is there any machine that is 100% efficient?
No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). ... That is why 100% efficiency in machines shall not be possible .
Why is the efficiency of a machine never 100 %?
Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). The output work is always less than the input work because some of the input work is used to overcome friction . Therefore, efficiency is always less than 100 percent.
Is there any real machine where its efficiency is 100% why?
Answer: In practice no machine can achieve 100% efficiency . When you mean 100% efficiency it means your input energy should be completely transformed to output energy. ... Various mechanical and electrical losses like friction and eddy current losses are the reasons behind the energy dissipation.
Why is it impossible to get an efficiency of 100% or greater?
It is impossible for heat engines to achieve 100% thermal efficiency () according to the Second law of thermodynamics. This is impossible because some waste heat is always produced produced in a heat engine , shown in Figure 1 by the term.
Which machine has efficiency less than 100%?
However, if you measure a machine’s input force and output force, you will find the efficiency is always less than 100%. A machine’s measured mechanical advantage is called actual mechanical advantage.
Why the efficiency of a machine is less than 1?
Since a machine does not contain a source of energy, nor can it store energy, from conservation of energy the power output of a machine can never be greater than its input, so the efficiency can never be greater than 1.
How can you increase the efficiency of a machine?
For a lever, you can increase the machine’s efficiency by reducing the friction .
Is it possible to design a machine that has an efficiency greater than 100 %?
All machines are subject to energy conservation in that no machine can output more energy (do more work) than the energy put into it. ... In other words, no machine can be more than 100% efficient . Machines cannot multiply energy or work input.
What is impossible for a machine?
By the principle of conservation of energy , energy can never be created or destroyed. To do more work by a machine than the amount of work done on the machine is impossible because to do so machine will have to create energy within itself which violates the principle of conservation of energy.
Can a perfectly efficient system ever be created?
The fact is, you can’t make a super-efficient system without any waste . No matter how good of an engineer you are, you can’t invent a perfect engine. ... Simply put, a heat engine
What is the most efficient machine?
“ The bicycle is the most efficient machine ever created. Converting calories into gas, a bicycle gets the equivalent of 3,000 miles per gallon.” —Bill Strickland Chart by Kirkpatrick Sale ranks energy efficiency from low end (mouse, plane, car) to supreme (human on bicycle).
How do we calculate efficiency?
We can calculate the efficiency of anything by dividing the energy input and the energy output by 100% . We use this equation generally to represent the energy in the form of heat or power.
