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Why do all engines operate at less than 100 percent efficiency?
Wiki User
∙ 11y ago
According to the Kalvin - Plank statement:-
It is impossible to construct a device operating in a thermodynamic cycle. which produce no effect other than work output and exchange heat with a single reservoir
and if it will be possible then it will called the PMM-2 (Perpetual motion machine of second kind).
because if the engine exchange heat only with one thermal reservoir then the entire heat is converted into an equivelnt account of work and efficiency become 100%.
Wiki User
∙ 13y ago
Engines cannot operate at 100% efficiency due to unavoidable energy losses, such as friction, heat transfer, and incomplete combustion. These losses result in some energy being converted to waste heat instead of useful work, limiting the overall efficiency of the engine.
Wiki User
∙ 11y agoA absorb heat
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If the output work of a simple machine is than input work the machine is said to have less than 100 percent efficiency?
No, a simple machine with less output work than input work is said to have less than 100 percent efficiency. Efficiency is a measure of how well a machine converts input work into output work, with 100 percent efficiency meaning that all input work is converted to useful output work.
If the output work of a simple machine is than the input work the machine is said to have less than 100 percent efficiency?
input
Why don't modern fossil fuel power plants operate at or near 100 percent efficiency?
Modern fossil fuel power plants cannot operate at or near 100 percent efficiency due to various energy losses during the conversion process. Energy losses occur through heat dissipation, frictional losses, and incomplete combustion, resulting in lower overall efficiency. Additionally, energy is lost in the transmission and distribution of electricity from power plants to end-users.
The efficiency of a machine is always less than 100 percent because?
some energy is always lost to factors like friction, heat, and sound during the operation of a machine, reducing its efficiency below 100%.
How does reducing friction increase the mechanical efficiency of a compound machine?
Reducing friction in a compound machine helps minimize energy loss due to heat and wear, improving the overall mechanical efficiency. With less friction, there is less resistance to the movement of parts within the machine, allowing it to operate more smoothly and with less effort. This results in increased performance and reduced energy consumption.
Is it possible that in an engine there will be an 100 percent efficiency without the presence of friction and other irreversibility?
No. No engine can be 100% efficient. The Carnot cycle is mathematically proven to provide an upper bound for efficiency. The efficiency of the Carnot cycle can be calculated from the formula:eta = 1 - Tc/THwhereis eta is efficiencyTc is the temperature of the heat sinkTH is the temperature of the heat source.The only way to make the (theoretical) efficiency 100% would be to have a heat sink at absolute zero (which is impossible due to the 2nd law of thermodynamics) or to have the heat source at a temperature of infinity (which is impossible due to the 1st law). Real engines always operate at an efficiency less than the theoretical because they operate on a less efficient cycle and/or posses real irreversibility in their operation. Consequently no engine - real or theoretical - can operate at 100% efficiency.
What would cause the calorimeter efficiency to be less than 100 percent?
why is the efficiency of a calorimeter less than 100%
How fast can a jet aircraft go?
conventional jet engines (using a compressor) will operate at speeds up to slightly less than Mach 1using an afterburner a conventional jet engine can operate at speeds slightly above Mach 3ramjet engines will operate at speeds up to about Mach 5scramjet engines can operate at speeds well above Mach 6However the maximum speed of of an actual airplane is usually less than the capability of the engines it uses.
Why a normal machine could not have the mechanical efficiency of 100?
Because there is always going to be friction, the efficiency of any machine will always be less then 100 percent.
Why do most very small engines operate on 2 stroke?
Most small engines are two stroke because you can get more power from a smaller engine with two stroke rather than a four stroke engine. It takes less to cool and to operate the engine.
Thermal efficiency in a coal fired power plant?
It can be up to 40 percent in modern plants, less in old ones
Who is better gasoline engine or diesel engine?
diesel. Diesel engines tend to have better efficiency especially at less than full load. Gasoline/Petrol and LPG engines tend to have better power weight ratios.
What is the efficiency is the output work is 12000 and the input work is 15000?
Efficiency as a percent is output/input * 100%12000/15000 * 100% = 80% efficiency which makes sense, because it takes more work (input) than it give out (output). So the efficiency should be less than 100%.
Why is mechanical efficiency always less than 100 percent?
That simply means that some energy is lost, due to friction and other causes.
Why jet engines are flown on high altitudes?
Reasons of efficiency. not the least of which is that the pressure generated in the combustion chamber has to fight less "back pressure" (think of it as pressure resistance) at high altitude because the air-pressure is less.
Why don't modern fossil fuel power plants operate at or near 100 percent efficiency?
Modern fossil fuel power plants cannot operate at or near 100 percent efficiency due to various energy losses during the conversion process. Energy losses occur through heat dissipation, frictional losses, and incomplete combustion, resulting in lower overall efficiency. Additionally, energy is lost in the transmission and distribution of electricity from power plants to end-users.
What are the main features and benefits of a jaw crusher?
1. Jaw plates are reversible. 2. Broken particle size uniformity, crushing ratio of high efficiency. 3. Less noise, dust, easy to operate. 4. Well-designed, easy to operate.
