Thermal Engineering - 1
ME8493 THERMAL ENGINEERING - I
UNIT I GAS AND STEAM POWER CYCLES
Air Standard Cycles - Otto, Diesel, Dual, Brayton – Cycle
Analysis, Performance and Comparison – Rankine, reheat and regenerative cycle.
UNIT II RECIPROCATING AIR COMPRESSOR
Classification and comparison, working principle, work of
compression - with and without clearance, Volumetric efficiency, Isothermal
efficiency and Isentropic efficiency. Multistage air compressor with
Intercooling. Working principle and comparison of Rotary compressors with
reciprocating air compressors.
UNIT III INTERNAL COMBUSTION ENGINES AND COMBUSTION
IC engine – Classification, working, components and their
functions. Ideal and actual : Valve and port timing diagrams, p-v diagrams- two
stroke & four stroke, and SI & CI engines – comparison. Geometric,
operating, and performance comparison of SI and CI engines. Desirable
properties and qualities of fuels. Air-fuel ratio calculation – lean and rich
mixtures. Combustion in SI & CI Engines – Knocking – phenomena and control.
UNIT IV INTERNAL COMBUSTION ENGINE PERFORMANCE AND SYSTEMS
Performance parameters and calculations. Morse and Heat Balance
tests. Multipoint Fuel Injection system and Common Rail Direct lnjection
systems. Ignition systems – Magneto, Battery and Electronic. Lubrication and
Cooling systems. Concepts of Supercharging and Turbocharging – Emission Norms.
UNIT V GAS TURBINES
Gas turbine cycle analysis – open and closed cycle. Performance
and its improvement - Regenerative, Intercooled, Reheated cycles and their
combinations. Materials for Turbines.
