Ventilation Flashcards
Uses of a vent system
- Cooling equipment
- CBRN
- Living spaces
- Machinery space cooling
- Galley Ventilation
What are the different types of ventilation?
- Fan supply & Fan exhaust
- Fan supply & Natural exhaust
- Natural supply & Fan exhaust
- Natural supply & Natural exhaust
Describe Fan Supply & Fan exhaust
- Sucks air in then out
- used in machinery spaces,galleys,laundries
Describe Fan supply & Natural exhaust
- Sucks air in then lets its naturally dissipate
- used in store rooms, workshops
Describe Natural supply & Fan exhaust
- Air drifts in & is drawn out
- Fitted in paint stores & inflam stores
Natural supply & Natural exhaust
- Air drifts in & out
- Only used in unoccupied compartments
What are the 6 common filters for Ventilation?
- Panel
- Supply
- Grease
- Lint
- Dust
- Flameproof Gauzes
Which spaces require special filters?
- Galley
- Store room
- Auxiliary machinery space
- Magazines
- Paint stores
Ventilation
What are the special requirements for Sewage treatment spaces?
- 15 air changes per hour
Ventilation
What are the special requirements for Magazines?
100% treated air
Ventilation
What are the special requirements for auxiliary machinery spaces?
50% of exhaust fans at deck level
Which compartments require Fire Flaps
- Galleys
- Main machinery spaces
- Magazines
What is the basic Air conditioning cycle?
- 33% fresh air in
- 67% Recirc
When are Citadel tests done?
- Anually
- Prior to DED
- During harbour acceptance trails
- During sea acceptance trails
- During FOST
What are the steps for citadel testing
- Close citadel
- Open AFU inlets & start AFU
- Restrict access
- Serach for leaks, 2 inch vacuum required
- Record results