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What is the ideal efficiency of an engine if both its hot reservoir and exhaust are at 400K?
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What is the ideal efficiency of a heat engine that operates with its hot reservior at 500k and its sink at 300k?
Using Carnot's equation of ideal efficiency, N= 1-C/H C is the temperature of the cold reservoir and H is the temperature of the hot reservoir. So it would be N= 1-300/500= .4 or 40%
What is propulsion efficiency?
It is efficiency of the propelling device in converting the applied torque into useful thrust. In an IDEAL propeller the freestream velocity and the slipstream velocity should be same. The higher the exhaust/slip stream velocity, higher is the wasted kinetic energy. Thus turbojet engine has lower propulsive efficiency and turbo-prop engine has higher propulsive efficiency.
What factors reduce the efficiency of a heat engine from its ideal value.?
friction, imperfect insulation
Does an ideal machine would have an efficiency greater than one?
No, an efficiency greater than one would not be possible, since that would violate a very fundamental law of physics: conservation of energy. The efficiency of an "ideal machine" would be one, in many cases; the efficiency of an ideal Carnot engine would be less than one.
What is the ideal efficiency of an automobile engine where fuel is heated to 2900 K and the outdoor air is at 285 K?
42
In what machine does work input equals work output?
In practical there is no machine which have efficiency 100%,i.e. output work = input work. But an ideal machine have efficiency of 100%, for an example a Carnot's heat engine. The efficiency of this engine is 100% but it is an ideal situation. As an expression of efficiency it is equal to W/Q, where W is work done by the system and Q is heat put into the system. For efficiency =1 ,i.e.100% if and only if W=Q and vice verse.
How does the thermal efficiency of an ideal Otto Cycle change with the compression ratio of the engine and the specific heat ratio of the working fluid?
The answer is 38.
Is it possible to attain an efficiency of 100 percent in heat engines?
The maximum efficiency of the carnot engine only depends on two factors: 1 - The temperature of the hot reservoir (TH) 2 - The temperature of the cold reservoir (TC) And is given by (TH - TC) / TH « or » 1 - TC / TH So by that we can see the maximum efficiency (100%) would be when the difference of temperatures between the two reservoirs is infinite.
How the efficiency of a ideal machine compares with the efficiency of a real machine?
In an ideal frictionless system, the work input equals the output and force. Your Welcome!!!
How the efficiency of an ideal machine compares with the efficiency of a real machines?
In an ideal frictionless system, the work input equals the output and force. Your Welcome!!!
What is the ideal exhaust temperature of a turbo petrol engine?
A pre-turbo exhaust temperature of between 1500-1650*f is optimal. Here is a link below, on using your EGT's to help you tune your car.
Is it bad to remove your o2 sensor?
Yes. Without it, the engine management system can no longer control the engine for ideal fuel and pollution efficiency. It'll burn more and dirtier. And this can damage the catalytic converter.
