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Igor C. Croiset

GIZ Proklima

Senior consultant

Factors which influence the choice of alternatives

Workshop on HFC management:Session 4: Challenges and opportunities in addressing high-GWP

HFCs in the foam sector

Bangkok21st April

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Foam performance sequence of requirements

• Foam performance depends in the following order on:

1. Machinery

2. Operator knowledge

3. Product and design

4. Chemicals

The gap between theory and practical application can be substantial therefore selection needs to comprehend the above.

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Insulation requirements are determined according to the design requirements, foam performance and energy efficiency standards.

Status quo  Thickness insulation walls (mm) 50Thickness insulation roof (mm) 75Insulation material PUThermal conductivity (mW/m.K) 22Size cold room (LxWxH m) 6x4x2.5Cold room real temperature °C -10.00Stored food A FishStored food B BeerStored food A required temp. °C -8Stored food B required temp. °C 0Mass of stored food A 4788Mass of stored food B 470.4Cold room real temperature °C -10Ambient temperature °C 25Daily stock renewal 10%New stock temperature °C 10.00

• E.g take a cold room 6x4 m which has the purpose of preserving food

• The kind of food stored, temperature conditions and logistics together with the insulation properties determine the cooling power and overall energy efficiency

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Cold room – Impact design and good practices parameters

Increase of insulation

100%

Improvement insulation per-

formance 2 mW

Outside under the sun

placed room

Increase of ambient tem-perature to 32°C due to

outside placement

Stock replen-ishment

cooled down to 0°C

Opening clos-ing doors 5x times more than usual

Lights left on instead of

switching off everytime the room is left

Increase of food tempera-

ture by 2°C due to electri-cal shortage

Series1 -13.4% -2.4% 3.0% 7.2% -7.2% 6.1% 4.9% 3.8%

-12.5%

-7.5%

-2.5%

2.5%

7.5%

-13.4%

-2.4%

3.0%

7.2%

-7.2%

6.1%

4.9%3.8%

Par

amet

ers

infl

uen

ce

The best insulation provides substantial improvement but for highest efficiency good practices need to go along!

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Extract main applications

Sector Application Drivers Alternatives

Construction/Industrial

Sandwich panels Constructive soundness HC's, H2O

Boards (PU,XPS,EPS) Cheap, easy application HC's

Spray foaming Easy and cheap H2O

Transport Refrigerated trucks, containers ATP-energy HC's, (HFO's)

Commercial refr. Cold rooms, supermarket utilities

Energy, consumer appeal HC's, H2O

Domestic refr. Home appliance Energy HC's, (HFO's)

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Selection?

• The selection of a foam system is dependant on the application together with the manufacturing method

• Secondly, whether you need additional insulation performance through high performance blowing agents and if it is worthwhile needs to be assessed?

• Increase of foam thickness to improve energy efficiency is a viable solution where possible?

Insulation is a must, 50% of energy consumption is from private housing for heating/ cooling!

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Thank you for your attention!

For further info feel free to contact:

bernhard.siegele@giz.deigor.croiset@proklima.net