An engine working on air-standard dual cycle has compression ratio 9.the pressure and temperature at the beginning of the cycle are 1 bar and 90 degrees * C . the maximum pressure of the cycle is limited to 68 bar and total heat supplied during the cycle is 1750 kj/kg. Determine a) pressure and temperature at the end of the expansion (b) thermal efficiency (c) MEP Assume cp, cv = 1.007, 0.7 kj/kg.

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IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.