External combustion engines are discussed as possible alternatives to the internal combustion engine for vehicle propulsion. Potential advantages are low levels of exhaust pollution, quiet operation, high starting torque, and possible lower costs during a vehicle lifetime.
What are the advantages of combustion engine?
Internal combustion engines have several advantages over external combustion engines. Because the fuel burns directly in the cylinder of the internal combustion engine, the heat loss is smaller, the thermal efficiency is higher, and fuel consumption is lower.
What are disadvantages of external combustion engines?
Disadvantages of external combustion engines
- Not suitable for low load requirements.
- Leakage of working fluid.
- Lubricant consumption.
- Size of engine is relatively big.
- Overall working temperature is high so great care and special building materials are required.
What are the applications of external combustion engine?
External combustion engine
External combustion engines are no longer used in transportation, as mobile designs are not efficient enough, but they continue to be used in power plants. For example, a natural gas power plant boils water into steam to turn a turbine, creating electricity.
Are external combustion engines more efficient?
As the combustion process is used to provide a continuous heat input to the working gas, it is more controllable and potentially more efficient, cleaner and quieter than internal combustion engines.
What are the advantages and disadvantages of internal combustion engines?
Advantages of internal combustion engines
- Size of engine is very less compared to external combustion engines.
- Power to weight ratio is high.
- Very suitable for small power requirement applications.
- Usually more portable than their counterpart external combustion engines.
- Safer to operate.
- Starting time is very less.
What are the advantages and disadvantages of electric motors as compared to internal combustion engines?
Electric engines have much less moving parts and require less maintenance than combustion engines. Electric cars are also cheaper to maintain than petrol cars and although not much is known yet about their longevity, it looks like they will surpass that of a combustion engine.
What are the two main types of external combustion engine?
External combustion engines can either be steam engines or Stirling engines. Steam engines turn liquid water into gaseous steam and runs steam locomotives and power plants and are very widely used.
What is the difference between SI and CI engine?
Difference Between Si engine and Ci engine
Si engine is internal combustion engine that operates on the principle of spark ignition. It uses petrol and utilizes the Otto cycle. The diesel (Ci) engine is also an internal combustion engine, which uses diesel fuel and operates on diesel cycle.
What is the difference between IC engine and EC engine?
An Internal combustion engine does not require a boiler or other components, thus it is light and compact. Whereas the external combustion engine requires a boiler and other components to transfer energy, thus it is heavy. The internal combustion engine has an efficiency of about 35-45 %.
Which is better internal or external combustion engine?
In IC engines, the combustion of fuel takes place inside, whereas in EC engines the fuel combustion takes place outside the cylinder. The advantages of IC engine are higher BTE, more horsepower developed per unit weight and low cost compared to that of external combustion engine.
Is diesel engine and external combustion engine?
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine).
Why is it called reciprocating engine?
A reciprocating engine is an engine that uses one or more pistons in order to convert pressure into rotational motion. They use the reciprocating (up-and-down) motion of the pistons to translate this energy.
What is the most efficient engine in the world?
Welcome to a brand-new generation of engines. The Wärtsilä 31 is setting a new standard for energy efficiency, delivering the lowest level of fuel consumption of any four-stroke engine worldwide.
Which engine is more efficient?
“Diesel engines are more fuel-efficient and have more low-end torque than similar-sized gasoline engines, and diesel fuel contains roughly 10% to 15% more energy than gasoline. So, diesel vehicles can often go about 20% to 35% farther on a gallon of fuel than their gasoline counterparts.