Mikael BörjessonProduct manager

Commercial air handling units

Ventilation functionality

Building management system integration

Topics

• Presentation of the new generation of compact air handling units, when standardization meets adaptation

• What performance will you have if you integrate the production of heating and cooling inside an air handling unit?

• How to ventilate with minimal risk of contamination from extract air?

Background and purpose

Purpose

GOLD PX

Fresh air

Impurities

Several tasks:• Transport

• Impurities

• Over/under-temperature

• Provide fresh air

• Balance pressure in building

• Recover heat and cold

As energy effective as possible!

Characteristics

GOLD PX

GOLD SD

Different components and combinations of…• Fans

• Energy exchangers

• Casing

• Controls

• Modularity/flexibility

…will make products suited for different applications

Air handlig units (AHU)

GOLD PX

GOLD SD

• Different combinations gives different product categories• One piece units

• Modular units

• Supply- and extract air units

• Residential units

• Room units

Todays focus: One piece unit

GOLD PX

GOLD SD

Key components and controls in one casing

• Benefits:• Compact sizing

• Integrated functionality and controls

• Serie produced & quality tested

• Energy effective

• Optimized costs

• Easy to configure

Performance – hard facts

• What are included in “high performance”?• Two main aspects:

1. Ability to recover energy from air

streams

2. Ability to transfer air in an

effective manner:

- Air pressure in system

- Pressure drop in unit

- Air flow

- Fan performance

- Unit size

Performance – Energy recovery

• Target: Find an optimal balance between energy recovery and internal pressure drop

Effective energy exchanger

High temperature recovery

between supply- and extract air

demands high density which

means more material that can

transfer energy

Increases pressure drop

Low pressure drop

The air streams will pass the

exchanger easily, which will

decrease the needed fan energy

Decreases the energy recovery

Recommendation!

Compare different annual energy

calculations

Performance – Effective air movement

• Low electrical consuming per unit transported air• Index key:

• SFPv: Ventilation units specific fan effect, kW/(m3/s)

• Depending of:

Fan efficiency

Low pressure drop internally

Performance – Effective air transport

• The unit is not everything – it has to match the system

Airflow that matches fan

capacity/unit size

Low duct pressure

Performance

To consider:

10% airflow increase

20% increase of duct pressure

40% increase of motor effect

Try to plan for future changes when dimensioning the unit/system

Performance

• Important to balance all this aspects!• Low SFPv-number for normal condition

• High annual energy efficiency for energy exchangers

• Low duct pressure

• Correct size for the ventilation unit

• Presentation of the new generation of compact air handling units, when standardization meets adaptation

The new GOLD air handling unit crosses the border for what we know about One piece units with compact design

The formula behind a good indoor climate

16

Hardware Software PerformanceKnowledge

94 96 98 00 02 04 06 08 10 12 14 16 18

More then 20 years…

GOLD ventilation + controls

Eco Design

Economy

Comfort

Flexibility

Intelligence

Safety

New generation GOLD

Constant development

New challenges

More freedom

• Modularity

• Adaptability

1994

3 sizes

1 cover

2017

New platform

ANIMATION MODULARITY

The best of two worlds

Serial produced compact unit

=Extended flexibility

+

Everyday benefits

Casing performance

• Excellent casing

• Improved design for outdoor installation

Composite hinges

Recessed doors

New sheet metal quality

Handles & connection hood adapted for outdoor use

Casing performance

• Outstanding performance data

• What performance will you have if you integrate the production of heating and cooling inside an air handling unit?

Presentation of the new GOLD air handling unit with integrated reversible heat pump.

An unbeatable combination for ventilation, heating and cooling

ANIMATION RX/HC

GOLD RX/HC

• Performance• Air flow up to 23400 m3/h

• Cooling output up to 110 kW

• Heating output up to 44 kW

• Operation down to -25°C and +35°C

• Energy efficient• Sorption rotor

• Inverter controlled compressor

• High COP/EER

Performance

Functionality

• Cost efficient• Defrosting options according to climate zone

• Simple system design• Ventilation, cooling and heating in a single package

• Simple installation and operation• Unbeatable compact dimensions

• Prefilled

• One common GOLD control interface

• How to ventilate with minimal risk of contamination from extract air?

Introducing the GOLD air handling unit with rotary exchanger and counter flow exchanger for different applications.

How to choose the right solution…

• Minimize contamination risk

• Keep or increase efficiency

Rotary heat exchanger

Optimized space

RECOnomic rotary exchanger

• Temperature efficiency above 85%

• No need for defrosting

• Patented solution

Conventional solution

Swegon’s turbulent solution

Patented

Contamination control

• Purging sector separates supply and extract air

Without purging sector

renblåsningssektor

With purging sector

Contamination control

Through…

• Pressure measurements

• Adjustments plates

• Purging sector

• Carry-over control

• Secured airflow

Reliable for VAV/DCV!

Extreme low internal leakage, only 0,45%

P

GOLD RX - Rotary heat exchanger

• High annual temperature efficiency

• No need of defrost

• Small footprint

• Most contamination is reduced

RECOflow Counter flow heat exchanger

• Temperature efficiency above 85%

• Demand controlled adaptive defrosting

• Compact design

• Internal leakage L2

ANIMATION GOLD PX

RECOfrost

• High temperature efficiency when defrosting

• Less need for post heating

• Unique demand control of defrosting

• Handles cold climates without pre heating

Exchanger/damper

Bypass

Exchanger/damper

Spring and autumn optimization

• Automatic pressure reduction

• Reduces pressure up to 64%

• Energy savings

RECOflow and RECOfrost

• Compact footprint

• Temp efficiency up to 88%

• High annual energy efficiency

• Tight – fulfil class L2

• Reduces pressure drop

How to choose the right solution…

• Minimize contamination risk

• Keep or increase efficiency

• Depending of odour you can choose both solutions

• Each solution has its advantage and disadvantage

Advantage:

• Annual energy efficiency

• Needed space

Advantage:

• High tightness class

• Demand controlled

defrosting

GOLD air handling unit

GOLD PX

GOLD SD

Key components and controls in one casing

• Adaptable

• Integrated cooling and heating production

• Energy efficient exchangers with solutions to handle contamination between air streams