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What is the ideal efficiency of an engine if both its hot reservoir and exhaust are at 400K?
The ideal efficiency of an engine operating between two thermal reservoirs is determined by the Carnot efficiency formula: ( \eta = 1 - \frac{T_{cold}}{T_{hot}} ). If both the hot reservoir and the exhaust are at 400 K, then the temperature of the cold reservoir is also 400 K. This results in ( \eta = 1 - \frac{400}{400} = 0 ). Therefore, the ideal efficiency of the engine in this scenario is 0%, meaning no work can be extracted.
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What is the ideal efficiency of an automobile engine where fuel is heated to 2900 K and the outdoor air is at 285 K?
The ideal efficiency of a Carnot engine can be calculated using the formula: Efficiency = 1 - (T_cold / T_hot), where T_cold is the temperature of the cold reservoir (in this case, 285 K) and T_hot is the temperature of the hot reservoir (2900 K). Plugging in the values, the ideal efficiency would be 1 - (285/2900) = 0.902 or 90.2%.
What is the ideal efficiency of a heat engine that operates with its hot reservior at 500k and its sink at 300k?
The ideal efficiency of a heat engine operating between a hot reservoir at 500 K and a cold reservoir at 300 K is given by the Carnot efficiency formula: Eff = 1 - (Tc/Th) where Tc is the temperature of the cold reservoir (300 K) and Th is the temperature of the hot reservoir (500 K). Plugging in the values, the efficiency would be Eff = 1 - (300/500) = 1 - 0.6 = 0.4 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.
Does a motorcycle engine need back pressure?
Yes, a motorcycle engine does benefit from some degree of back pressure, which helps optimize exhaust flow and enhances engine performance. However, too much back pressure can hinder performance by restricting exhaust flow. The ideal exhaust system design balances back pressure to improve throttle response and overall efficiency while allowing for sufficient exhaust gas expulsion. Ultimately, the specific requirements can vary based on the engine design and intended use.
What factors reduce the efficiency of a heat engine from its ideal value.?
friction, imperfect insulation
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.
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.
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.
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!!!
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!!!
What is the purpose lambda sensor?
A lambda sensor, also known as an oxygen sensor, measures the amount of oxygen in the exhaust gases of an internal combustion engine. Its primary purpose is to optimize the air-fuel mixture for efficient combustion, which enhances engine performance and reduces emissions. By providing feedback to the engine control unit (ECU), it helps maintain the ideal stoichiometric ratio, improving fuel efficiency and minimizing pollutants released into the atmosphere.
