How do you find the maximum theoretical efficiency?
The maximum theoretical efficiency of a heat engine (which no engine ever attains) is equal to the temperature difference between the hot and cold ends divided by the temperature at the hot end, each expressed in absolute temperature (Kelvin).
What is the theoretical maximum efficiency?
The Carnot Efficiency is the theoretical maximum efficiency one can get when the heat engine is operating between two temperatures: The temperature at which the high temperature reservoir operates ( THot ). The temperature at which the low temperature reservoir operates ( TCold ).
What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water?
Answer Expert Verified The maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water is greater than 0 but less than 50.
What is unusual about the behavior of water below the temperature of 4 C?
A: 4 degrees C turns out to be the temperature at which liquid water has the highest density. If you heat it or cool it, it will expand. The expansion of water when you cool it to lower temperatures is unusual, since most liquids contract when they’re cooled.
Why is no system 100% efficient?
A system can never be 100% efficient. The reason behind this is because of heat and sound energy are lost in some amount in every system. No matter they are waste or not. So a system doesn’t exist, with 100% efficiency.
Which statement is incorrect a all reversible cycles have same efficiency B reversible cycle has more efficiency than an irreversible one C Carnot cycle is a reversible one D Carnot cycle has the maximum efficiency in all cycles?
Explanation: Efficiency of all reversible cycles depends upon temperature of source and sink which will be different. Rest of the statements are correct.
Which cycle is more efficient Otto or Diesel?
3. 6 Diesel Cycle. Although for a given compression ratio the Otto cycle has higher efficiency, because the Diesel engine can be operated to higher compression ratio, the engine can actually have higher efficiency than an Otto cycle when both are operated at compression ratios that might be achieved in practice.
Why is Carnot cycle ideal?
Efficiency. The Carnot cycle is the most efficient engine possible based on the assumption of the absence of incidental wasteful processes such as friction, and the assumption of no conduction of heat between different parts of the engine at different temperatures.
What is reverse Carnot cycle?
Reversing the Carnot cycle does reverse the directions of heat and work interactions. A refrigerator or heat pump that operates on the reversed Carnot cycle is called a Carnot refrigerator or a Carnot heat pump.
What is reverse Brayton cycle?
As its name implies, a reverse Brayton cycle achieves a cooling effect by reversing the gas turbine Brayton cycle: a gas is compressed, cooled, and then expanded (Figure below).