What is the effect of increasing the cut-off ratio in a diesel?
When the cut-off ratio of diesel cycle increases, the air standard efficiency of the cycle is decreased when compression ratio is kept constant.
What is the significance of cut-off ratio in diesel cycle?
9-53C Cutoff ratio is the ratio of the cylinder volumes after and before the combustion process. As the cutoff ratio decreases, the efficiency of the diesel cycle increases.
What is cut-off ratio in diesel engine?
The cutoff ratio is the ratio of the volume after combustion to the volume before combustion. The Air standard efficiency of a diesel cycle is given as: η=1−1Rγ−10[γγc−1γ(γc−1)]
How the efficiency of diesel engine varies for different cutoff ratios and for which cutoff ratio the efficiencies of Otto and diesel cycles become identical?
A diesel engine is usually more efficient than a spark ignition engine because a. Diesel being a heavier hydrocarbon, release more heat per kg than gasoline b. The air standard efficiency of diesel cycle is higher than the Otto cycle, at a fixed compression ratio c.
What is relation between cut-off ratio and thermal efficiency for a diesel cycle?
The cutoff ratio severely reduces the thermal efficiency of the Diesel cycle as its value increases (Fig. 5).
Which is more efficient Otto or Diesel?
3. 6 Diesel Cycle. Although for a given compression ratio the Otto cycle has higher efficiency, because the Diesel engine can be operated to higher compression ratio, the engine can actually have higher efficiency than an Otto cycle when both are operated at compression ratios that might be achieved in practice.
What is relation between cut-off ratio and thermal efficiency for a Diesel cycle?
What is relation between cut off ratio and thermal efficiency for a Diesel cycle?
Which is more efficient Otto cycle or diesel cycle?
if u draw p-v diagram for the otto and diesel cycle for same compression ratio then you will easily find that otto cycle has more area than diesel cycle. It means that otto cycle gives more work than diesel cycle for same compression ratio. so, otto cycle has higher efficiency than diesel cycle.