International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 01 | Jan 2025
p-ISSN: 2395-0072
www.irjet.net
Availability Analysis and Impact of Equivalence ratio on Spark Ignition Engine with Alternative Fuels Santosh kumar Gupta1 1Department of Mechanical Engineering, Madan Mohan Malviya University of Technology, Gorakhpur, Uttar
Pradesh -273010, India 1Mechanical Engineering, Department of Technical Education, Uttar Pradesh-India
---------------------------------------------------------------------***--------------------------------------------------------------------The objective of the current study was to examine in Abstract - A constant volume, adiabatic system was used
detail the destruction of availability due to the compression process. The compression process in adiabatic, constant volume combustion system was studied.
to study the exergy loss during the cycle. This analysis was conducted without any experimental measurements. The percentage of fuel available for methanol-air mixtures that was used up in irreversible processes was computed as a function of temperature, pressure, and equivalency ratio. The quantity of accessible energy destroyed by combustion generally decreases as temperature rises. Because methanol and ethanol include some oxygen, they don't ignite with sparks. This study examines a fuel-air real cycle and performs equivalency ratio-dependent calculations for exergy destruction during compression, combustion, expansion, and exhaust. The methanol and ethanol analyses were conducted using equivalency ratios of 0.8, 0.9, 1.1, and 1.2. Varying the equivalence ratio is novelty of research. As the equivalency ratio varied, calculations were also made for the destruction and availability of energy during compression for methanol and ethanol. Additionally, depending on the particular operating conditions, the equivalency ratio has a significant impact on availability and destruction. Discussion is held regarding the implications of these discoveries for the combustion processes of internal combustion engines. The impact of altering the equivalency ratio on the maximum temperature and combustion efficiency is evaluated.
Ethanol, methanol, and propane are the alternative fuels under consideration. An engineer is interested in determining the most useful work that can be obtained from a system in a given state.[27][28] Obviously, the maximum work will be obtained only when the system's final state is in equilibrium with its surroundings. In other words, until the system's interaction with the environment reaches a point where it can no longer function in any way. A system's availability is determined by the maximum amount of useful work that may be obtained throughout a process that ends when the system reaches a state of inactivity or equilibrium with its surroundings.[4] It is obvious that a system's availability is dependent upon both its internal and external conditions. The second law of thermodynamics, a comprehensive and potent statement of related physical observations with numerous implications for the engineering design and operation of energy conversion systems, directly leads to availability. [5].
2 Availability
Key Words: Spark ignition engine, Exergy, Equivalent ratio, compression, combustion
A thermodynamic property of a system, availability is also known as exergy or exergy (essence of energy) by various authors. It measures the maximum useful work that a system can achieve when it is permitted to reversibly transition to a thermodynamic state that is in equilibrium with its surroundings.[23][24]
1.INTRODUCTION It is well known that combustion processes result in an irreversible loss of energy or availability. One direct outcome is the availability of energy conversion systems. A powerful exposition of relevant physical facts, the second law of thermodynamics has numerous applications in engineering and energy conversion system operation. As an illustration, the second law determines the direction of processes, establishes equilibrium conditions, calculates the maximum performance of thermal systems, and identifies the elements of processes that are harmful to overall performance. The second law of thermodynamics offers a framework for a more comprehensive understanding of combustion processes. deep comprehension of the energy conversion mechanism. [1,2,3]
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2 Methodology 2.1 Restricted Dead State The restricted dead state is used to characterize the conditions of the local environment. This was selected because, when a system reaches perfect balance with its immediate surroundings, it can no longer generate any more valuable work and is deemed to be "dead." This dead state is incomplete and called "restricted" because the contents of the system cannot mix or react with the surroundings.[24][25]
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