The results show that γ-type Stirling engine is being able to produce the highest power output and the highest thermal efficiency (9.223 W and 9.8%). It is followed by β-type Stirling engine (8.634 W and 7.5%). In contrast, the lowest performance is achieved by α-type Stirling engine (0.908 W and 1.8%).
What is the best type of Stirling engine?
One of the most efficient Stirling engines ever made was the MOD II automotive engine, produced in the 1980′s. It reached a peak thermal efficiency of 38.5%. Compare this to a modern spark-ignition (gasoline) engine, which has a peak efficiency of 20-25%.
What is the most efficient engine type?
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 efficiency of a Stirling engine?
The thermal efficiency of Stirling engines is 40% while the efficiency of similar Otto and Diesel engines are 25 and 35%, respectively. The Stirling engine cycle is a closed regenerative thermodynamic cycle, with cyclic expansion and compression of the working fluid at various temperatures [7–11].
Is a Stirling engine more efficient?
Compared to an internal combustion engine of the same power rating, Stirling engines currently have a higher capital cost and are usually larger and heavier. However, they are more efficient than most internal combustion engines. Their lower maintenance requirements make the overall energy cost comparable.
Which one is more efficient between Stirling gasoline and diesel engine?
The Stirling engine uses the Stirling cycle, which is unlike the cycles used in internal combustion engines and has the potential to be much more efficient than a gasoline or diesel engine.
What is the most fuel-efficient marine engine?
Wärtsilä 31 is recognised by Guinness World Records as the world’s most efficient 4-stroke diesel engine
- Technical data.
What is the most fuel-efficient boat engine?
Many trawlers operate on diesel engines, which tend to be among the most fuel efficient boat motors. In addition, trawlers are constructed with slow-speed, semi-displacement hulls that help contribute to better boat gas mileage.
What is the most fuel-efficient marine diesel engine?
The Wärtsilä 31 engine has been recognised by Guinness World Records as being the world’s most efficient 4-stroke diesel engine.
What is the most efficient heat engine?
The most efficient heat engine cycle is the Carnot cycle, consisting of two isothermal processes and two adiabatic processes. The Carnot cycle can be thought of as the most efficient heat engine cycle allowed by physical laws.
Why are Stirling engines so inefficient?
Stirling’s original design involved a rather complicated double-piston mechanism that caused friction losses. Furthermore, the necessary heat exchangers reduce the efficiency in comparison to internal combustion engines.
Why don’t we use Stirling engines?
Stirling engines are rarely used for generating electricity. They are basically reciprocating engines and require fairly exotic alloys in their heat exchangers. Although in theory they are fairly efficient they are expensive and bulky.
Are Stirling engines more efficient than steam engines?
The biggest advantage of Stirling engines is that they’re much more efficient than steam engines (largely because of the closed cycle and regenerative heat exchanger).
What is the advantage of Stirling engine?
The main advantages of Stirling engines are the ability to use various heat sources and combustion chambers meeting environmental requirements, a low level of noise and vibration; favorable characteristics for both vehicles and stationary electric generators, and good consistency with a linear electric machine.
What is the difference between alpha beta and gamma type Stirling engines?
Alpha engines have two pistons in separate cylinders which are connected in series by a heater, regenerator and cooler. Both Beta and Gamma engines use displacer-piston arrangements, the Beta engine having both the displacer and the piston in an in-line cylinder system, whilst the Gamma engine uses separate cylinders.