ACTIVE LEARNING PROCESS

1. ACTIVE LEARNING PROCESS Branch: Computer Engineering Guided By : Prof. JugalPanchal Prepared By : DishantPanchal13BECEG112 NeeshitKaushik13BECEG122 Neel Panchal13BECEG116

2. Training Agenda: Refrigeration & Air Conditioning Introduction Type of refrigeration Refrigeration & AC

3. High Temperature Reservoir Heat Rejected R Work Input Heat Absorbed Low Temperature Reservoir Introduction How does it work? Refrigeration and air conditioning is used to cool products or a building environment. Refrigeration & AC

4. Introduction How does it work? Thermal energy moves from left to right through five loops of heat transfer: 1) Indoor air loop 2) Chilled water loop 3) Refrigerant loop 4) Condenser water loop 5) Cooling water loop Refrigeration & AC (Bureau of Energy Efficiency, 2004)

5. Introduction Refrigeration systems for industrial processes • Small capacity modular units of direct expansion type (50 Tons of Refrigeration) • Centralized chilled water plants with chilled water as a secondary coolant (50 – 250 TR) • Brine plants with brines as lower temperature, secondary coolant (>250 TR) Refrigeration & AC

6. Training Agenda: Refrigeration & Air Conditioning Introduction Type of refrigeration Types Of Air Conditioner Refrigeration & AC

7. Types of Refrigeration Refrigeration systems • Vapour Compression Refrigeration (VCR): uses mechanical energy • Vapour Absorption Refrigeration (VAR): uses thermal energy Refrigeration & AC

8. Type of Refrigeration Vapour Compression Refrigeration • Highly compressed fluids tend to get colder when allowed to expand • If pressure high enough • Compressed air hotter than source of cooling • Expanded gas cooler than desired cold temperature Refrigeration & AC

9. Type of Refrigeration Vapour Compression Refrigeration • Two advantages • Lot of heat can be removed (lot of thermal energy to change liquid to vapour) • Heat transfer rate remains high (temperature of working fluid much lower than what is being cooled) Refrigeration & AC

10. 3 Condenser High Pressure Side 4 Expansion Device Compressor 2 Low Pressure Side 1 Evaporator Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle Refrigeration & AC

11. 3 Condenser High Pressure Side 4 Expansion Device Compressor 2 Low Pressure Side 1 Evaporator Type of Refrigeration Low pressure liquid refrigerant in evaporator absorbs heat and changes to a gas Vapour Compression Refrigeration Refrigeration cycle /Refrigeration & AC

12. 3 Condenser High Pressure Side 4 Expansion Device Compressor 2 Low Pressure Side 1 Evaporator Type of Refrigeration The superheated vapour enters the compressor where its pressure is raised Vapour Compression Refrigeration Refrigeration cycle Refrigeration & AC

13. 3 Condenser High Pressure Side 4 Expansion Device Compressor 2 Low Pressure Side 1 Evaporator Type of Refrigeration The high pressure superheated gas is cooled in several stages in the condenser Vapour Compression Refrigeration Refrigeration cycle Refrigeration & AC

14. 3 Condenser High Pressure Side 4 Expansion Device Compressor 2 Low Pressure Side 1 Evaporator Type of Refrigeration Liquid passes through expansion device, which reduces its pressure and controls the flow into the evaporator Vapour Compression Refrigeration Refrigeration cycle Refrigeration & AC

15. Type of Refrigeration Vapour Compression Refrigeration Type of refrigerant • Refrigerant determined by the required cooling temperature • Chlorinated fluorocarbons (CFCs) or freons: R-11, R-12, R-21, R-22 and R-502 Refrigeration & AC

16. Type of Refrigeration Vapour Compression Refrigeration Choice of compressor, design of condenser, evaporator determined by • Refrigerant • Required cooling • Load • Ease of maintenance • Physical space requirements • Availability of utilities (water, power) Refrigeration & AC

17. Generator Condenser Hot Side Evaporator Cold Side Absorber Type of Refrigeration Vapour Absorption Refrigeration Refrigeration & AC

18. Type of Refrigeration Vapour Absorption Refrigeration Evaporator Refrigeration & AC

19. Type of Refrigeration Vapour Absorption Refrigeration Absorber Refrigeration & AC

20. Type of Refrigeration Vapour Absorption Refrigeration High pressure generator Refrigeration & AC

21. Type of Refrigeration Vapour Absorption Refrigeration Condenser Refrigeration & AC

22. Training Agenda: Refrigeration & Air Conditioning Introduction Type of refrigeration Type Of Air Conditioner Refrigeration & AC

23. Types Of Air Conditioner Air Conditioning System Refrigeration & AC • An air conditioning system is an assembly of different part of the system used produce a specified condition of air within a require space or building. • The basic elements of air conditioning system:-- • Fans : For circulation of air • Filters : For cleaning air • Heating Elements : Heating of air(It may be electric heater , steam , hot water. • Control System : It regulates automatically the amount of cooling or heating. • Grill : It adjust the direction of the conditioned air to the room. • Tray : It collects condensed water. • Refrigerating Plant : provide cooling . It consist of compressor/generator and absorber,eveporator,condensor,expansion device(capallary tube).

24. Types Of Air Conditioner • Window Air Conditioner • Split Air Conditioners Refrigeration & AC

25. Types Of Air Conditioner Window Air Conditioner Refrigeration & AC

26. Types Of Air Conditioner Window Air Conditioner • Working:--The air circulation system of the window air conditioner comprises of the following parts (please refer fig 4 & 5). • 1) Blower: This is the small blower that is fitted behind the evaporator or cooling coil inside the assembly of the window air conditioner system. The blower sucks the air from the room which first passes over the air filter and gets filtered. The air then passes over the cooling coil and gets chilled. The blower then blows this filtered and chilled air, which passes through the supply air compartment inside the window air conditioner assembly. This air is then delivered into the room from the supply air grill of the front panel. • 2) Propeller fan or the condenser fan: The condenser fan is the forced draft type of propeller fan that sucks the atmospheric air and blows it over the condenser. The hot refrigerant inside the condenser gives up the heat to the atmospheric air and its temperature reduces. • 3) Fan motor: The motor inside the window air conditioner assembly is located between the condenser and the evaporator coil. It has double shaft on one side of which the blower is fitted and on the other side the condenser fan is fitted. This makes the whole assembly of the blower, the condenser fan and the motor highly compact. Refrigeration & AC

27. Types Of Air Conditioner Split Air Conditioner Refrigeration & AC

28. Split Air Conditioner • The Split Air Conditioner divided in two parts:-- • (1)First part:-Include the evaporator,filter,evaporator fan and grill. They placed inside the room. • (2)Second part:-Include Condensor ,fan,compressor.This placed out side the room.diameter tubes.therefore,small hole rquired in wall of installation of split air condition.The split air conditioning units are available in capacity range of 1 to 3 tons.

29. Training Session on Energy Equipment Refrigeration & Air Conditioning Systems THANK YOU FOR YOUR ATTENTION Refrigeration & AC