A heat engine operating between 2 temperatures, Thot, the heat source, and Tcold, the heat sink, can be 100% efficient only when Tcold is absolute zero.
Carnot worked out the equation to determine the best possible efficiency of a heat engine designed to produce mechanical energy ("Work") from heat energy:
Wout = (Heat Energy in at Thot) x (Thot - Tcold)/(Thot)
Note that (Thot - Tcold)/(Thot) is 1 only if Tcold is zero. In every other case, the ratio is less than 1.
The amount of heat energy discharged to the heat sink at Tcold is:
(Heat Energy in at Thot) - Wout.
(You can work this out from the equation. It reflects the law of conservation of energy. )
This just means that all the heat energy absorbed by the heat engine is converted into either mechanical energy or heat energy at a lower temperature. No energy is lost and no extra energy is created.
"Efficiency" according to Carnot's equation tells us the best possible ratio between these two energy outputs that nature allows a heat engine to achieve.
You can think of a heat engine as a device that splits an amount of heat energy at some high temperature into mechanical energy and heat energy at some lower temperature.
Kind Regards,
Colin Dunstan
Author: "cyclic heat to work conversion systems"
It is not.
1) The Carnot efficiency, 1 - Tc/Th, with Tc being the colder temperature and Th the hotter temperature (in Kelvin), gives a theoretical maximum for the efficiency of a heat engine. This efficiency is always less than 1 (that is, less than 100%).
2) Due to different real-life losses, real heat engines don't even achieve the theoretical Carnot efficiency.
The ideal reversible heat engine would follow or be equivalent to the Carnot cycle - but even that cycle is not 100% efficient - a manifestation of the second law of thermodynamics.
A heat engine of 100 percent efficiency violates the second law of thermodynamics and is impossible even in theory.
Yes. If all of the effects and factors that prevent 100% efficiency are ignored,
then the efficiency is 100% .
Because unavoidably there would be a loss of energy during the process
Some of the force used in a lever will be to overcome friction, this means that not 100% of the force can be used to lever as some of it will be used to overcome friction as well as an multitude of other forces.
i think its velocity is min n its try to attain max. velocity which is terminal velocity...what say?
The boiling point of water is just 100 deg celcius. But the ignition temperature for paper would be higher than 200 deg celcius. So when paper cup filled with water it cannot attain temperature higher than 100 deg. Hence no burning becomes possible
extreme tornadoes can attain wind speeds of more than 300 mph (480 km/h)
Because unavoidably there would be a loss of energy during the process
Some of the force used in a lever will be to overcome friction, this means that not 100% of the force can be used to lever as some of it will be used to overcome friction as well as an multitude of other forces.
Yes, it is possible and normal.
Yes, smiling is possible in each phase of life. It gives you positivity and helps you attain peace.
If one has a bad driving record, it is still possible to attain car insurance in the state of Virginia. The main problem is that you will end up paying a much higher premium.
Energy efficiency is a major concern in the Middle East. In the KSA, companies aim to attain energy conservation targets through energy audits, retrofitting, and remote monitoring to reduce the energy and water consumption of both public and private buildings.
attain means accomplish.EXAMPLE:I want to attain knowledge.
Yes, it is still possible for a male to enter puberty at 16 or 17 years of age. It is unlikely, buy possible, as all guys develop at different ages.
No.To explain requires many years of education
Only if you are a photon. In that case, you always move at the speed of light. If you're not a photon, and have any mass while you're sitting still, and are not moving at the speed of light right now, then you can never attain light speed.
When Ben Franklin first devised his project to attain moral perfection it suggested that Franklin possessed self confidence. Franklin thought it would be difficult but possible to achieve moral perfection.
When Ben Franklin first devised his project to attain moral perfection it suggested that Franklin possessed self confidence. Franklin thought it would be difficult but possible to achieve moral perfection.