Dual cycle

The dual cycle is an important part of I mechanical engineering.

here I have to try to derive some of the rules and important parts.
such as,

1.History
2.Comparison Between Otto, Diesel and Dual Cycle
3.Dual Combustion Engine
4.Characteristics
5.Parts Of Engine
6.Stroke
7.Sequence of Operations
8.Expression For Efficiency
9.Applications
10.Automobile
11.Generators/Aircrafts
12.Marine Engines

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1. Dual Cycle Presented By: ITM UNIVERSE Name Enrollment No. Harshal Bhatt 150950119504 Chintan Dave 150950119507 Vaibhavraj Chavda 150950119508 Smeet Gandhi 150950119511

2. Oil Engine 1888. Ackroyd Staurt (Automatic Ignition). Rudolf Diesel Used This Principle And Developed Basis Of Dual Combustion Engine. History

3. 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. History

4. Comparison Between Otto, Diesel and Dual Cycle

5. Air TC BC Compression Process Const pressure heat addition Process Expansion Process Const volume heat rejection Process Const volume heat addition Process Q in Q out Q in Dual Cycle

6. Process 1  2 Isentropic compression Process 2  X Constant volume heat addition Process X  3 Constant pressure heat addition Process 3  4 Isentropic expansion Process 4  1 Constant volume heat rejection Q in Q in Q out Dual Cycle

7. It is an internal combustion four stroke engine. “Dual” Because Combustion Takes Place In Two Parts First At Constant Pressure And Second At Constant Volume . This makes it better than diesel engine’s cycle. Dual Combustion Engine

8. Also Known As The Limited Pressure Or Mixed Cycle, Seiliger Cycle Or Sabathe Cycle. Thermal Cycle That Is A Combination Of The Otto Cycle And The Diesel Cycle. Dual Combustion Cycle

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

10. Parts Of Engine

11. Each Cycle Of Piston Consists Of Two Opposite Motions: There Is A Motion In One Direction, And Then A Motion Back In The Opposite Direction. Each Of These Is Called A Stroke Stroke Is The Action Of A Piston Travelling The Full Length Of Its Locomotive Cylinder Or Engine Cylinder In One Direction.   Stroke

12. The dual cycle consists of following operations: Adiabatic compression Addition of heat at constant volume. Addition of heat at constant pressure. Adiabatic expansion. Rejection of heat at constant volume. Sequence of Operations

13. Engine efficiency  of thermal engines is the relationship between the total energy contained in the  fuel, and the amount of energy used to perform useful work . Efficiency

14. From first law of thermodynamics Q = ∆ U + W And.. ∆ W = Q1 – Q2 The efficiency of engine is defined as ƞ = Output / input Expression For Efficiency

15. Continued.. The efficiency of engine is defined as useful work done to the heat provided. Where , Q1 is the heat absorbed Q1 – Q2 is work done.

16. The analysis of cycle is as follows : The heat is supplied In two stages. hence Qin = mcp(T4 – T3) + mcv(T3 – T2 ) The heat rejected is Qout = mcv(T5 – T1) Efficiency of dual combustion engine

17. The thermal efficiency may be found as follows : ƞ = 1 – Qout/ Qin = 1 – mcv(T5 – T1)/ mcv(T3 - T2)+mcp(T4 – T3) = 1 – (T5 – T1)/ (T3 – T2) + ϒ (T4 – T3) Simplification

18. Dual combustion engines are most commonly used for mobile propulsion in vehicles and portable machinery. In mobile equipment, dual combustion is advantageous since it can provide high power-to-weight ratios. Applications

19. Generally using fossil fuel(mainly petroleum), these engines have appeared in transport in almost all vehicles (automobiles, trucks, motorcycles, boats, and in a wide variety of aircraft and locomotives). Automobile

20. Very high power-to-weight ratios are required, dual combustion engines appear in the form of gas turbines. These applications include jet aircraft, helicopters, large ships and electric generators . Generators/Aircrafts

21. Marine Engines

22. There is a role for Dual Combustion engines for future energy use, because – Dual combustion engine has high power to weigh ratio. – Relatively low cost. – Flexible fuel use. – Established manufacturing investment. Future Energy Use

23. Work Example 1

24. SOLUTION

25. The End

26. Thank you for your time....