#1. Air at 300oK and 101 kPa is compressed in an engine modeled using the cold air-standard Diesel cycle. The engine has a compression ratio of 10 and a cutoff ratio of 1.4. Determine:
#2. Repeat problem 1 on an air-standard basis and compare the results to those obtained in problem 1.
#3 Derive an expression for the efficiency of a cold air-standard dual cycle as a function of the the specific heat ratio (k), compression ratio (r), the pressure ratio (rp), and the cutoff ratio (rc) only.
#4 An engine is modeled as a cold air-standard dual cycle (k=1.4). At the beginning of compression process the temperature is 300 K and the pressure is 100 kPa. The compression ratio is 10, the pressure ratio for constant volume heat addition is 1.2, and the cutoff ratio is 1.3. Sketch a P-v diagram for the cycle, complete the table below, and determine the thermal efficiency. Note: R=0.287 kJ/kg-K.
Worked out examples (tutorials).
See if you can find the mistake in my movie. :) The efficiency of the cold air-standard Otto cycle is
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