CFD use in HVAC Sandvika, Norway June 8, 2017
CFD use in HVAC
Sandvika, Norway
June 8, 2017
Independent marine HVAC Specialist
Heating Ventilation Air Conditioning
Established in 2008
Based in Amsterdam
Working international
Over 20 years experience in offshore and marine
by Patrick
Black box
HVAC System
System integration
Fit for use?
Tailored to customer needs?
Can it be improved?
Price ok?
Etc.
Consultancy
System integration
Project management
Engineering support
Basic engineering
HVAC Integration Management System
Domains of expertise
MECHINALENGINEERING
HVACIMS
INTERIORARCHITECT
COMMISSIONING
EXTERIORDESIGN
OWNERSTEAM
INTERIOR ENGINEERING
HVACDESIGN
Used from start engineering till commissioning
Cruise vessels
Offshore
Ferries
RoRo
RoPax
Yachts
Vessel types
Today’s topics
Air flow simulation
Accommodation
Differences summer/winter
Ducting (flow and pressure)
Engine room ventilation
Flow main ducting
Air flow accommodation
Execution air flow
Air volumeAir velocityAir throw lengthLocation slots
ResultDraught on bed
Air flow summer
35°C outside temperature
11°C supply air temperature
Air flow winter
0°C outside temperature
28°C supply air temperature
Air flow difference
Results summer
Cold air has higher weightQuick mixingHigher risk on draughtChoose right position ventilation slots
Results winter
Warm air has less weightDifficult mixingHigher risk on dry air (use humidification)Choose right position ventilation slots
Air flow ducting velocity
Risks during design
Air velocity
Pressure
Noise
Energy loss
Air flow ducting velocityOption A Option B Option C
Air flow ducting velocity
366m³/h 164m³/h 265m³/h
v=4,4m/s v=1,9m/s v=3,1m/s
46% 21% 33%
307m³/h 278m³/h 210m³/h
v=3,6m/s v=3,3m/s v=2,5m/s
39% 35% 26%
280m³/h 212m³/h 303m³/h
v=3,3m/s v=2,4m/s v=3,5m/s
35% 27% 38%
Option A Option B Option C
Air flow ducting pressure
Option A
Air flow ducting pressure
Option B Option C
Add pressure regulating valves
Air flow engine room
Function supply air
Combustion air
Ventilation
Transmission cooling
Risks
Hotspots
Pressure