Complete Otto Cycle Problem (3 of 3) | Thermodynamics

Welcome to Engineering Hack! In today's video we are solving a part 3 video of thermodynamics on cycles. The problem tells us that An ideal Otto cycle is being compressed and heat is transferred to air during the constant-volume heat-addition process, and we want to determine maximum temperature and pressure that occur during the cycle, the net work output, the thermal efficiency, and the mean effective pressure for the cycle. The problem requires you to know the first law of thermodynamics, have an understanding of interpolation, Otto cycle, thermal efficiency and mean effective pressure, all these subjects have already been addressed in previous videos. Everything else comes by analyzing the problem and the system at hand.
Problem statement: An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 100 kPa and 17°C, and 800 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine.
(a) the maximum temperature and pressure that occur during the cycle
(b) the net work output
(c) the thermal efficiency, and
(d ) the mean effective pressure for the cycle.

Answer
c) 52.3%
d) 495 kPa
In this video:
00:09 Answer in watts?
00:53 thermal efficiency
01:41 mean effective pressure for the cycle
07:26 final thoughts

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