In which of the following air standard cycle, heat is added partly at constant volume and partly at constant pressure?

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JKSSB JE Mechanical 02 Nov 2021 Shift 1 Official Paper
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  1. Lenoir Cycle
  2. Dual Cycle
  3. Diesel Cycle 
  4. Otto Cycle 

Answer (Detailed Solution Below)

Option 2 : Dual Cycle
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Detailed Solution

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Explanation:

The Dual Cycle, also called a mixed cycle or limited pressure cycle, is a compromise between Otto and Diesel cycles.

Dual cycle is a thermodynamic cycle that combines the Otto cycle and the Diesel cycle. In this cycle the heat addition occurs partly at constant volume and partly at constant pressure.

Different processes in the dual cycles are given below:

Process 1-2: Reversible adiabatic compression.

Process 2-3: Constant volume heat addition.

Process 3-4: Constant pressure heat addition.

Process 4-5: Reversible adiabatic expansion.

Process 5-1: Constant volume heat rejection.

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