What is Carnot engine explain its working?
Carnot engine is a theoretical thermodynamic cycle proposed by Nicolas Léonard Sadi Carnot in 1824. Carnot states that a hot body is required that generates heat and a cold body to which the caloric is conveyed, which produces mechanical work in the process.
What is QH and QC?
To get rid of the entropy, every heat engine must dump some waste heat into its environment. We use the symbol Qh for the heat absorbed from the hot reservoir in some given period, and Qc for the heat expelled to the cold reservoir.
What is Carnot engine in simple words?
Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It estimates the maximum possible efficiency that a heat engine during the conversion process of heat into work and, conversely, working between two reservoirs can possess.
What is Carnot heat engine explain its various parts & the working also find the expression for its efficiency?
The efficiency of a Carnot engine is defined as ratio. of net mechanical work done per cycle by the gas to. the amount of heat energy absorbed per cycle from. the source.
What is Th and Tc thermodynamics?
The thermodynamic temperature scale (absolute T) Efficiency of a Carnot engine is: η = 1 – (Qc / Qh) = 1 – (Tc / Th) The zero point of the thermodynamic scale is fixed as the T of the cold reservoir Tc at which η = 1 and hence Qc = 0 and W = Qh.
What is TC and TH in Carnot engine?
TH and TC represent the temperatures of the hot and cold thermal reservoirs; Smin and Smax represent the minimum and maximum entropy reached by the working fluid in the Carnot cycle.
Why is the Carnot engine the most efficient?
Carnot engine is an engine which undergoes a thermodynamic reversible cycle in which four processes take place. It is called the most efficient engine just because it is reversible. It is an ideal engine.
Is Carnot engine exist?
Carnots engine cannot be real because 100% efficiency cannot be obtained in real life. This is because, to achieve 100% efficiency in Carnot’s engine the temperature of the sink must be as least as possible.
What is a Carnot cycle find the expression for the work done by a Carnot engine find its efficiency?
efficiency =WQH=1−TCTH. These temperatures are of course in degrees Kelvin, so for example the efficiency of a Carnot engine having a hot reservoir of boiling water and a cold reservoir ice cold water will be 1−(273/373)=0.27, just over a quarter of the heat energy is transformed into useful work.
Why 100 efficient engine is not possible?
A heat engine is considered to be 100% efficient if only all the heat is converted into useful work or mechanical energy. Since heat engines cannot convert all the heat energy into mechanical energy, their efficiency can never be 100%.