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