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HVAC | Slide 1 of 29 May 2006 Heating, Ventilation and Air- Conditioning (HVAC) Part 2: HVAC systems and components Supplementary Training Modules on Good.

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Presentation on theme: "HVAC | Slide 1 of 29 May 2006 Heating, Ventilation and Air- Conditioning (HVAC) Part 2: HVAC systems and components Supplementary Training Modules on Good."— Presentation transcript:

1 HVAC | Slide 1 of 29 May 2006 Heating, Ventilation and Air- Conditioning (HVAC) Part 2: HVAC systems and components Supplementary Training Modules on Good Manufacturing Practice Section 7

2 HVAC | Slide 2 of 29 May 2006 Objectives In the following slides, we will study the components of air- handling systems in order to: 1. Become familiar with the components 2. Know their functions 3. Become aware of possible problems HVAC

3 HVAC | Slide 3 of 29 May 2006 HVAC General Design of HVAC is dependent on required degree of air cleanliness Suitable components should be selected including: –fans, –driers, –filters, –ducts, grilles, etc. 7.

4 HVAC | Slide 4 of 29 May 2006 + Production Room Exhaust air treatment Central air handling unit Terminal air treatment at production room level Fresh air treatment (make-up air) HVAC Main subsystems

5 HVAC | Slide 5 of 29 May 2006 HVAC Components Components in HVAC may include, depending on need: Filters Fans –no fan failure; including supply air fans, return air fans, exhaust air fan, dust extract system fans Driers –Drying of air with chemical driers, e.g. rotating desiccant wheel Frost coils for preheating air 7.1.1 – 7.1.7

6 HVAC | Slide 6 of 29 May 2006 HVAC Components Components in HVAC may include, depending on need: Snow eliminators Dust eliminators Moisture eliminators Precooling coils Alarm systems, grilles/diffusers, etc. 7.1.1 – 7.1.7

7 HVAC | Slide 7 of 29 May 2006 FilterSilencer Terminal filter Weather louvre Control damper Fan Flow rate controller Humidifier Heating coil Cooling coil with droplet separator Production Room Overview components + Prefilter Exhaust Air Grille Heater Secondary Filter Recirculated air HVAC

8 HVAC | Slide 8 of 29 May 2006 Weather louvre Silencer Flow rate controller Control damper To prevent insects, leaves, dirt and rain from entering To reduce noise caused by air circulation Automated adjustment of volume of air (night and day, pressure control) Fixed adjustment of volume of air Components (1) HVAC

9 HVAC | Slide 9 of 29 May 2006 Heating unit Cooling unit/ dehumidifier Humidifier Filters Ducts To heat the air to the proper temperature To cool the air to the required temperature or to remove moisture from the air To bring the air to the proper humidity, if too low To eliminate particles of predetermined dimensions and/or microorganisms To transport the air Components (2) HVAC

10 HVAC | Slide 10 of 29 May 2006 Control damper for airflow De-humidification Filter Pressure Gauges AHU with fan Variable Speed Controller Humid room air Air heater Regeneration air Humid room air Adsorber wheel Dry air Air-handling unit HVAC

11 HVAC | Slide 11 of 29 May 2006 Humidifier Silencer Heating and cooling units HVAC

12 HVAC | Slide 12 of 29 May 2006 Filter classes Dust filters Standard Aerosol FineCoarseULPAHEPA 10 µ m > Dp > 1 µ m Dp > 10 µ m Dp < 1 µ m F5 - F9G1 - G4U 14- 17H 11 - 13 EN 1822 Standard EN 779 Standard HVAC

13 HVAC | Slide 13 of 29 May 2006 Primary panel filter Secondary filter HEPA or tertiary filter HVAC

14 HVAC | Slide 14 of 29 May 2006 HVAC

15 HVAC | Slide 15 of 29 May 2006 Positioning of filters (1) Filter in terminal position AHU mounted final filter Production Room + HEPA Filter HVAC

16 HVAC | Slide 16 of 29 May 2006 Prefilter AHU Main filter 1 23 Low level exhausts Ceiling exhausts Positioning of filters (2) HVAC

17 HVAC | Slide 17 of 29 May 2006 AHU Prefilter Final filter 21 Positioning of filters (3) HVAC

18 HVAC | Slide 18 of 29 May 2006 Swirl Type air diffusors with terminal filters 1 Filter 2 Tightening frame 3 Register outlet 4 Screw fixation for register 1 2 3 4 HVAC

19 HVAC | Slide 19 of 29 May 2006 Low induction swirl diffusor (preferred) High induction office type diffusor (avoid) HVAC

20 HVAC | Slide 20 of 29 May 2006 Regulation of room pressure – pressure differentials concept Room pressure gauges Room pressure indication panel HVAC

21 HVAC | Slide 21 of 29 May 2006 Flow rate controller Control damper Humidifier Cooling battery Filters Ducts Blocked Poorly adjusted, bad pressure differential system Bad water/steam quality/ poor drainage No elimination of condensed water/ poor drainage Incorrect retention rate/damaged/badly installed Inappropriate material/internal insulator leaking Problems with components HVAC

22 HVAC | Slide 22 of 29 May 2006 HVAC In the next slides Consider different air types, e.g.: Supply air Return air (recirculated air) Fresh air (make-up air) Exhaust air And: Concepts of air delivery to production areas: Recirculation systems Full fresh-air systems

23 HVAC | Slide 23 of 29 May 2006 + Production Room Exhaust air Return air (recirculated) Fresh air (make-up air) Supply air Air types HVAC

24 HVAC | Slide 24 of 29 May 2006 HVAC Recirculation systems There should be no risk of contamination and cross- contamination when air is recirculated Normally, HEPA filters (EN1822 H13) needed in supply air stream –Not required in single product facility with no risk of cross-contamination –Not required where no dust generation (e.g. secondary packaging) HEPA filters placed in AHU or terminally Dust from highly toxic processes should not be recirculated 7.2.1 – 7.2.6

25 HVAC | Slide 25 of 29 May 2006 Ventilation with recirculated air + make-up air Central Air-Handling Unit Return air Exhaust Unit HVAC

26 HVAC | Slide 26 of 29 May 2006 HVAC

27 HVAC | Slide 27 of 29 May 2006 HVAC Full fresh-air systems 100% fresh air - normally where toxic products are processed, and recirculation not recommended No contamination from fresh air – sufficient filtration needed Degree of filtration on exhaust dependent on exhaust air contaminants and environment regulations Energy-recovery wheels –Should not be source of contamination –Relative pressure between supply and exhaust air 7.3.1 – 7.3.3

28 HVAC | Slide 28 of 29 May 2006 Ventilation with 100% fresh air (no air recirculation) W Washer (optional) Central Air-Handling Unit Production Rooms Exhaust Unit HVAC

29 HVAC | Slide 29 of 29 May 2006 HVAC


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