What are the advantages and disadvantages of a 4 stroke engine?
More fuel efficiency :- 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes. Less pollution :- As power is generated once every 4 strokes & also as no oil or lubricant is added to the fuel; 4 stroke engine produces less pollution.
Is a diesel engine a heat engine?
A diesel engine is a type of internal combustion heat engine, powered by diesel. These engines run small electric generators called diesel generators, often in remote areas as well as the engines of cars and trucks (both large and small).
Why is the heat engine not 100% efficient?
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%.
Why are heat engines inefficient in general?
Why are heat engines inefficient, in general? … Heat engines attempt to convert the worst source of energy into the best.
Which engine has highest efficiency?
The steam turbine is the most efficient steam engine and for this reason is universally used for electrical generation. Steam expansion in a turbine is nearly continuous, which makes a turbine comparable to a very large number of expansion stages.
What is the end goal of all the heat engine?
Depending on the type of engine, different processes are employed, like igniting fuel through combustion (gasoline and coal), or using energy from nuclear processes to produce heat (uranium), but the end goal is the same: to turn the heat into work.
Is a refrigerator a heat engine?
As we know, a heat engine is something that converts heat into mechanical work. … But according to the second law of thermodynamics, a refrigerator is a device which is used to turn mechanical work into heat. Therefore, we can say that a refrigerator is a heat engine that works in a backward direction.