HVAC SYSTEM in Bangla::Chiller-AHU-Cooling Tower::Heating, Ventilation & Air-Conditioning. 

HVAC SYSTEM in Bangla::Chiller - AHU - Cooling Tower::Heating,Ventilation & Air-Conditioning । 61।- iEEE SCHOOL
Basic of HVAC System
Mainly chiller two types:
1. Vapour Compression Type Chiller.
2. Vapour Absorption Type Chiller.
Condenser এর উপর ভিত্তি করে Chiller 2 ধরনের হয়ে থাকেঃ
1. Air-Cooled Chiller
2. Water-Cooled Chiller
আবার Compressor এর উপর ভিত্তি করে Chiller কয়েক প্রকার হয়ে থাকেঃ
1. Centrifugal Chiller
2. Reciprocating Chiller
3. Scroll Chiller
4. Frictionless Centrifugal Chiller
5. Oil free or Magnetic bearing Chiller etc.
There are 4 cycle of Water-Cooled chiller:
1. Refrigeration Cycle or Vapor Compression Cycle
2. Chilled Water Cycle
3. Condenser Water Cycle
4. Air Cycle
Main parts of Chiller:
Compressor
Condenser
Thermal Expansion Valve( TEXV)
Evaporator
R-134a refrigerant (Gas)
R-123 refrigerant(Gas)
R-410a refrigerant(Gas)
R-407c refrigerant(Gas)
R-22 refrigerant(Gas)
Heating, Ventilation and Air-Conditioning
HEAT :Heat is a flow of energy due to temperature differences
TWO TYPES
1. SENSIBLE HEAT
2. LATENT HEAT
SENSIBLE HEAT: The heat you can sense by Thermometer is called Sensible Heat
LATENT HEAT: Latent heat is hidden or invisible heat. It is the amount of heat added or removed from a body to change its state without changing the temperature
TEMPERATURE: How Hot or Cold an object is called Temperature
Humidity: Humidity is the amount of water vapor in the air. Too much or too little humidity can be dangerous.
AIR-CONDITIONING: The control of temperature, humidity, purity, and motion of air in an enclosed space, independent of outside conditions.
AHU-FCU-COOLING TOWER
1. Refrigeration cycle or vapor compression cycle
2. Chilled water Cooled cycle
3. Condenser water cycle
4. Air cycle
Compressor, condenser, Thermal Expansion valve, Evaporator
Refrigerant, R-22, R-410a, R-134a, R-600a
Air-Conditioning system, Fresh air intake, duct, diffuser, grille, supply air duct, return air duct, Exhaust air duct, humidity.
For better listening, use headphones. Pardon any mistakes.
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