25% An air standard Otto cycle has a compression ratio of 7.5. At the beginning of compression, P1=85kPa and T1=32C. The

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25 An Air Standard Otto Cycle Has A Compression Ratio Of 7 5 At The Beginning Of Compression P1 85kpa And T1 32c The 1 (59.74 KiB) Viewed 61 times

25% An air standard Otto cycle has a compression ratio of 7.5. At the beginning of compression, P1=85kPa and T1=32C. The mass flow of air is 2g/s, and the maximum temperature in the cycle is 960K. Use constant specific heats at room temperature and pressure. Determine: 1. Draw a graph of the cycle on a T-s plot starting with point 1 as the start of the compression stroke, then point 2 is the end of that and the start of the combustion of the air/fuel mixture and so on till you complete the cycle. 2. Form a table that lists the temperatures in K for all the states using the numbering system suggested above. 3. The heat rejection, in KJ/s 4. The net work, in KJ/s 5. The thermal efficiency