Use of Finite Time Thermodynamic Simulation of Performance of an Otto Cycle with Variable Specific Heats of Working Fluid

Abstract 

A finite time thermodynamic modelling and simulation of irreversible Otto cycle engines has been developed taking into account the variability of specific heats for working fluid due to temperature variation. The effect of three different parameters on the engine was discussed, which are: the internal irreversibility, the heat losses and the friction losses. A program was developed by using MATLAB software to perform the necessary calculations of thermodynamic model. According to the results obtained, it was found that the results obtained from the thermodynamic model compared with the results obtained from experiments are convergent, and may be used in actual engine designs and applications.

Table of contents

Dedication -----------------------------------------------------------------------

Acknowledgement -------------------------------------------------------------

Abstract ------------------------------------------------------------------------

List of Symbols ---------------------------------------------------------------

List of tables --------------------------------------------------------------------

List of figures -------------------------------------------------------------------

1. Introduction

1.1 Research overview ----------------------------------------------

1.2 Research problem -----------------------------------------------

1.3 Research objectives ---------------------------------------------

1.4 Research approach ----------------------------------------------

1.5 Methodology ------------------------------------------------------

1.6 Thesis layout ------------------------------------------------------

2. Literature Review

2.1 Introduction -------------------------------------------------------

2.2 Historical background ------------------------------------------

2.3 Literature review -------------------------------------------------

3. Theoretical Framework

3.1 Equilibrium thermodynamics---------------------------------

3.2 First law efficiency ---------------------------------------------

3.3 Second law efficiency-------------------------------------------

3.4 Non-equilibrium theory----------------------------------------

3.5 Reversibility and irreversibility ------------------------------

3.6 Irreversibilities ---------------------------------------------------

3.7 Endoreversible thermodynamics ----------------------------

3.8 Endoreversible system (Novicov engine) ------------------

4. Thermodynamic Modeling

4.1 Introduction ------------------------------------------------------

4.2 Diesel engine thermodynamic cycle model ----------------

4.3 Thermodynamic model analysis ----------------------------

4.4 Solving methodology------------------------------------------

4.4 Program flow chart--------------------------------------------

5. Results and Discussion

5.1 Introduction -----------------------------------------------------

5.2 Thermodynamic model input data details ---------------

5.3 Effect of internal irreversibility ----------------------------

5.4 Effect of heat loss ---------------------------------------------

5.5 Effect of friction loss ----------------------------------------

5.6 Effect of cut-off ratio ----------------------------------------

6. Conclusion and Recommendations

6.1 Conclusion -----------------------------------------------------

6.2 Recommendations --------------------------------------------

References --------------------------------------------------------------------

Appendix: Program code