Dual Cycle

Dual cycle process

1. Dual Cycle Emmerson Millian Micah Thompson Irvin Ruiz

2. INTRODUCTION

3. INTERNAL COMBUSTION ENGINE Is an engine that generates motive power by the burning of gasoline, oil or other fuel with air inside the engine, the hot gases being used to drive a piston or do other work as they expand.

4. INTRODUCTION Dual cycle was first introduced by an engineer named Gustav Trinkler . In this cycle , part of the heat addition is at constant volume( Isochoric ) and at constant pressure ( Isobaric ) . The name Dual cycle is derived from the fact that if is an integration of both the Otto and Diesel cycle.

5. INTRODUCTION The Otto cycle and the Diesel cycle they differ in the manner in which heat is added to the cycle either at constant volume or at constant pressure and in which the Dual cycle combines the advantages of both types of cycles .

6. CHARACTERISTICS It is a four stroke engine Improved and modern form of old Diesel engine’s cycles. Its one stroke is divided into 2 parts allowing it to carry out more work. Have increased efficiency

7. MARINE ENGINES APPLICATION

8. CYCLE ANALYSIS

9. Process 1  2 Isentropic compression (Reversible Adiabatic) Process 2  2.5 Constant volume heat addition Process 2.5  3 Constant pressure heat addition Process 3  4 Isentropic expansion (Reversible Adiabatic) Process 4  1 Constant volume heat rejection (Cooling) Q in Q in Q out 1 1 2 2 2.5 2.5 3 3 4 4 Figure 12 CYCLE PROCESS

10. Comparison Between Otto, Diesel & Dual Cycle

11. Note, the Otto cycle (r c =1) and the Diesel cycle ( a =1) are special cases: Based on Figure 12 THERMAL EFFICIENCY

12. Work Example 1

13. Work Example 2

14. Thank you !!!