Boiler mountings and accessories: water level indicator, feed check valve, blow-off cock, steam separator, safety valves, feed pump, air preheater, super heater and economizer
Water conditioning: water problems and benefits of water conditioning, types and causes of scale and deposits, scale deposit prevention methods
Air Compressor (4 hours)
Classification and applications
Reciprocating air compressors: types, construction, working principle and performance
Centrifugal air compressors: types, construction, working principle and performance
Construction and working of rotary, vane and roots compressors
Multi stage compression and its advantages, inter-cooling, work done of multi-stage compression
Condensers (3 hours)
Classification of condenser, elements of a condensing plant
Condenser performance parameters
Comparison of jet and surface condenser
Condenser vacuum and its efficiencies
Refrigeration Systems (8 hours)
Definition and applications of refrigeration
Simple and modified vapor compression refrigeration cycles: ideal and actual cycles, representation on P-h and T-s diagrams, work done and coefficient of performance, vapor absorption refrigeration system, basic and practical vapor absorption, Electrolux vapor absorption and air refrigeration system
Refrigerants: introduction, classifications, desirable properties of an ideal refrigerant, properties and uses of common refrigerants, ozone depletion potential and global warming potential
Air-Conditioning (9 hours)
Definition and scope of air-conditioning
Psychometrics and properties of air
Psychometric chart and various processes: sensible heating, sensible cooling, cooling with dehumidification, cooling with humidification, heating with dehumidification, heating with humidification, adiabatic mixing of two streams of moist air
Types of air-conditioning systems: direct expansion, split type, central A/C, variable air flow and variable refrigerant volume system, all air, all water, air-water systems, merits and demerits
Components of air-conditioning systems: ducts, fans, grills, registers, diffusers, balancing dampers, air filters, air handling units, fan coil units, humidifiers and dehumidifiers
Heating and cooling load calculation
Vapour Power Cycles (5 hours)
Rankine cycle: ideal and real cycle, components, working mechanism, efficiency calculation, operational parameters affecting efficiency, reheat cycle and regenerative cycle
Combined Rankine cycles: working mechanism and component diagram
Co-generation cycle: types, working mechanism and component diagram
Working mechanism and classification of steam engines
Essential components of steam power plant
Layout of steam power plant
Other Power Cycles (8 hours)
Air standard cycles
Brayton cycle: working principle, component diagram and efficiency; analysis of closed and open cycles; cycle with intercooling, reheating and regeneration; gas turbine power plant layout and components
Otto cycle: working principle, component diagram and efficiency
Diesel cycle: working principle, component diagram and efficiency; essential components and plant layout of diesel power plant
Dual cycle
Practicals
Study on performance of boiler and its mountings and accessories, energy and mass balancing
Performance analysis of air-compressor
Performance of vapor compression refrigeration system and Electrolux type refrigerator
Air-conditioning processes: cooling with dehumidification and cooling with humidification; heating with dehumidification and heating with humidification
Air-conditioning process: mixing of two streams of moist air
Performance of cooling tower
Study of components of central air-conditioning systems
Evaluation
Final exam questions cover all chapters. Approximate marks distribution (total 60 marks over 45 hours):
