The Carnot efficiency depends only on the temperature of the hot source and the cold sink.
On what factors the efficiency of a Carnot engine depends?
The efficiency of a Carnot engine depends solely on the temperatures of the hot and cold reservoirs.
What are the two factors affecting the thermal efficiency of cycle?
The thermal efficiency of a heat engine is expressed as a product of the Carnot efficiency, the external irreversibility factor and the internal irreversibility factor, by which the three factors that affect the thermal efficiency can be clearly distinguished, and the influences of the external and internal …
On what factor does the efficiency of heat engine depend?
The efficiency of an ideal heat engine only depends on the temperature of source and sink.
What are the factors affecting thermal efficiency?
In theory, the factors that affect thermal efficiency (the performance of an engine or the work it has done in relation to the value of heat supplied to it) are the heat input and the heat output. Additionally, temperature variations also come in play, the amount and the rate of losing or gaining heat.
Are Carnot engines 100% efficient?
In order to achieve 100% efficiency (η=1), Q2 must be equal to 0 which means that all the heat form the source is converted to work. The temperature of sink means a negative temperature on the absolute scale at which the temperature is greater than unity.
Which of the following cycle has maximum efficiency?
Explanation : Only Carnot cycle is the one which the processes involved are reversible.
Is a Carnot cycle reversible?
The reversible Carnot cycle provides an upper limit for the heat engine. In the Carnot cycle, the greatest possible share of the heat produced by combustion is converted into work. The Carnot process consists of two isothermal and two isentropic steps.
What are two essential features of Carnot’s ideal heat engine?
1-It should have a source of infinite thermal capacity. 2-It should have a sink of infinite thermal capacity.
How can you improve thermal efficiency?
Lower compression ratios need higher degrees of constant volume to improve the thermal efficiency by cooling loss reductions. Therefore, a method that reduces cooling loss without lowering the degree of constant volume will be effective to improve the thermal efficiency of internal combustion engines.
How can I improve the thermal efficiency of my house?
Here are our 10 top ways for you to bring down your bills and reduce your carbon footprint at the same time.
- Insulate your loft. …
- Upgrade your boiler. …
- Hang thick curtains and insulate your doors. …
- Watch your energy consumption. …
- Switch to a cheaper energy tariff. …
- Use a water-saving showerhead. …
- Fit double glazing.
Which engine has higher thermal efficiency?
Real diesel engines are of course considered to be more efficient that Otto cycle engines; one reason being that diesel engines typically operate at higher compression ratio and the expansion ratio from even the later stages of heat release can still be considerably higher than that of most real Otto cycle engines.