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 external combustion engines used for?
An external combustion engine burns fuel externally, or outside the engine. An external combustion engine burns fuel to heat water and produce steam. The steam is under pressure and is used to push a piston back and forth inside a cylinder.
What are the advantages of internal combustion engine over 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.
What are the advantages of internal combustion engine?
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.
Which is external combustion engine?
An external combustion engine (EC engine) is a heat engine where a working fluid, contained internally, is heated by combustion in an external source, through the engine wall or a heat exchanger. The fluid then, by expanding and acting on the mechanism of the engine, produces motion and usable work.
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 are the two types of external combustion engines?
- CANDU reactor (a type of nuclear power plant)
- coal-fired power plant.
- natural gas power plant.
- steam locomotive (although there are very few operational examples left)
- Solar thermal power plant.
- Stirling engine.
What are the disadvantages of external combustion engine?
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 is the meaning of combustion engine?
A combustion engine is an engine which generates mechanical power by combustion of a fuel. Combustion engines are of two general types: Internal combustion engine.
What is the main problem with internal combustion engines?
Petrol internal combustion engines do notable harm to environment. Transfer of ICE to the liquefied and natural gas restrains need of creation of the necessary number of gas-filling stations.
What is the most important difference between an internal and external combustion engine?
According to the book’s definitions of the two engines, the main difference between the external and internal combustion engine is that the external combustion engine burns fuel outside the engine, and the internal combustion engine burns fuel inside the engine.
What are the advantages of combustion?
Due to the increased combustion provided, the overall efficiency of the engine also improves and fouling and corrosion is reduced. These advantages then help improve heat transfer, reduce maintenance costs and equipment life interruptions and increase overall equipment life.
How does combustion engine work?
The engine consists of a fixed cylinder and a moving piston. The expanding combustion gases push the piston, which in turn rotates the crankshaft. … After the piston compresses the fuel-air mixture, the spark ignites it, causing combustion. The expansion of the combustion gases pushes the piston during the power stroke.
What are the main parts of external combustion engine?
In its simplest form the Stirling engine comprises cylinder, regenerator, piston and displacer as shown in the Fig. 8.1. Fuel is burned continuously outside the engine to maintain one end of the cylinder at high temperature while the opposite end is cooled by circulating water around it.
Are rockets external combustion engines?
Rocket engines are reaction engines, producing thrust by ejecting mass rearward, in accordance with Newton’s third law. … Rocket vehicles carry their own oxidizer, unlike most combustion engines, so rocket engines can be used in a vacuum to propel spacecraft and ballistic missiles.
What is meant by external combustion?
adjective. noting or pertaining to an engine, as a steam engine, in which fuel ignition takes place outside the cylinder, turbine, or the like, in which heat energy is transformed into mechanical force.