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The thermal efficiency of a 2-stroke engine is generally low due to its design, which leads to incomplete combustion and significant unburned fuel escaping during the exhaust phase. In 2-stroke engines, the intake and exhaust processes occur simultaneously, resulting in a loss of fuel and energy as fresh fuel can mix with exhaust gases. Additionally, the lack of a dedicated stroke for exhaust and intake reduces the time for proper combustion, further diminishing efficiency. These factors contribute to lower thermal efficiency compared to 4-stroke engines.
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What is the rate of heat output of a Carnot engine?
The rate of heat output of a Carnot engine depends on the temperature of the hot reservoir and the temperature of the cold reservoir. It can be calculated using the Carnot efficiency formula, which is the temperature difference between the hot and cold reservoir divided by the temperature of the hot reservoir.
Does a high-efficiency machine degrade a relatively high or low percentage of energy to thermal energy?
A high-efficiency machine degrades a relatively low percentage of energy to thermal energy. This means that a larger percentage of the energy input is converted into useful work or output, resulting in less wasted energy in the form of heat.
99 Chevy lumina check engine code is p0420 what does it mean?
Low catalytic converter efficiency.
The Structure of Rotary RTO?
Generally speaking, the more regenerative chambers, the higher the purification and thermal efficiency. With the development of technology, the third generation OF RTO, namely rotary RTO, was born. It has 12 circular regenerators and has the advantages of compact structure, small heat dissipation area, low energy consumption, high thermal efficiency, its purification efficiency can be up to 99.5%.
Why would Engine temperature increase at idling?
Because the efficiency of the fan and the water pump degrades at low RPM.
In a heat engine what happens to thermal energy that is converted from chemical energy?
When the heat energy is produced, either internally or externally to the engine, it produces a sudden expansion in the gas in the cylinder which drives the piston down, so transforming to mechanical energy. Not all the thermal energy can be used though, and some is lost to the engine's exhaust and cooling system. In a stationary engine some of this heat could be recovered and used, but it is at relatively low temperature so only suitable for low temperature processes like heating a building. In a moving vehicle this heat is just lost to the environment, which places a limit to the efficiency of the engine.
What are the advantages and disadvantages of a high horsepower, low torque engine in terms of performance and efficiency?
A high horsepower, low torque engine typically offers better top speed and acceleration, making it ideal for high-performance vehicles. However, it may lack low-end power and torque for tasks like towing or off-roading. This can lead to decreased efficiency and potential strain on the engine when under heavy load.
What qualifications do you need to be a thermal insulator?
Low thermal conductivity!
What are the advantages of long stroke engine?
It means Stroke is longer than the Bore. Due to the longer stroke, the engine makes good torque at relatively low rpms. more time available for combustion so low quality fuel can be burned. improved thermal efficiency{heat converted into useful work / total heat supplied} Reduction in nox due to higher compression ratios and reduced combustion chamber temperatures.
Why low efficiency bulbs are called energy savers?
They are not. Low E bulbs are low ENERGY, not low efficiency. They are actually highly efficient.
How does the thermostat affect fuel efficiency?
Your engine will get the best mileage at full operating temperature. If the thermostat is removed or too low a temperature unit the engine will use more fuel.
Why is a high efficiency machine is more desirable than a low efficiency machine?
A high efficiency machine will produce more of what is it that you want with the same power as the low efficiency one. In other words, for a low efficiency machine do as much as a high efficiency one, you have to give it more power (energy).
