Hvac

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Hvac

  1. 1. HVAC Heating Ventilating Air Conditioning
  2. 2. Applications of Air Conditioning Department stores Coliseums Grocery warehouses Commercial Complex Theaters Offices Food processing industries Semicon industries Hospitals Etc...
  3. 3. Tons of Refrigeration (TR) 1 TR is the amount of heat to be removed from the atmosphere to melt one metric ton of ice in 24 hours. 1 TR = 12000 Btu/hr = 3025 kcal/hr
  4. 4. Functions of Air Conditioning Control air temperature to provide thermal comfort Control air moisture content Maintain proper air movement Control air contamination and odor within acceptable limits
  5. 5. Basic Cycle and Components of Air Conditioning
  6. 6. Types of AC Systems
  7. 7. Window Type AC Units
  8. 8. Ductable Split AC Units
  9. 9. Package Type AC Units
  10. 10. DX System
  11. 11. Chilled Water AC System
  12. 12. Things to consider in AC system selection Heating load requirement Air distribution system or ducting system Efficiency of the AC System Noise level Water distribution system Economic viability of the system Space requirement
  13. 13. Things to consider in calculating heating load Outside and indoor conditions Room dimensions and height Construction materials Sunlight heat gain Glass transmission heat gain Infiltration heat gain Heat from occupancies Cubic feet of fresh air required Heat load from outside sources Room sensible heat Room latent heat Outside heat

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