Cooling technology

Are you overlooking this efficiency upgrade? – State of the art insulation from IglooDoors

Monday September 28th, 2020 01:07 PM Cooling technology

We have analyzed the operation and design of cold rooms from several practical aspects already, including the design of cold room doors. Energy efficiency and insulation go hand-in-hand. Since a large portion of heat or cold can be lost through doors and windows, they deserve special attention. This time, let’s dig into the importance of proper insulation of doors. 

Doors play such an important role in terms of energy efficiency that made us design our very own cold room doors under the IglooDoors brand. Our cold room door designs have been tested and fine tuned in use. The IglooDoors product line has undergone regular mechanical refinement and technical innovations with special attention to details such as sealing and insulation.

Thanks to continuous consultations with our suppliers, we have successfully developed a premium-quality EPDM rubber sealing for IglooDoors cold room doors with tripled lifespan, far exceeding the average insulation available on the market. Of course, we have paid equal amounts of attention to material quality and design, as well.

Why is thermal insulation a key factor in cold room design?

IglooDoors hinged and sliding doors differ both in their functionality and parameters and they can be further customized. However, the one thing that is common in both models is their exceptionally efficient insulation.

This is due to the thoughtful choice of materials. Door panels are made of individual insulation boards with a 40-42 kg / m3 PIR insulating core, which is entirely of freon and H-freon-free and made by a pentane foaming process. The result is a polyurethane rigid foam with almost 95% closed-cell layout.

Thickness of the thermal insulation layers vary between 60 and 150 mm, depending on the  storage and cooling needs. The entire insulation is fixed to the plate surface by shear-stable adhesion.

The specific temperature range of the cold room determines mainly what insulation thickness is recommended.

Panel thickness of various hinged and sliding cold room door models

Sliding doors:

IDH60 – Positive temperature range +12 -18 ° C – 60 mm

IDH80 – Positive temperature range 0 – 10 ° C – 80 mm

IDH100 – In the negative temperature range -18 to -22 ° C – 100 mm

IDH150 – Freezing and shocking equipment in the temperature range -25 to -40 ° C – 150 mm

Sliding doors:

IDS60 – Positive temperature range between +12 -18 ° C – 60 mm

IDS80 – Positive temperature range between 0 – 10 ° C – 80 mm

IDS100 – In the negative temperature range between -18 to -22 ° C – 100 mm

IDS150 – Freezer and blast-freezer in the temperature range of -25 to -40 ° C – 150 mm

Consequently, the lower the temperature range of the cold room, the thicker the insulation should be, in order to maximize heat retention. However,this does not mean that it is always advisable to choose the thickest possible door panel for energy saving purposes. Since weight of the door panel is directly proportional with the amount of insulation, we must always carefully choose the right size with the recommended thickness. Otherwise, a significant overload might damage the hinges. 

All in all, in order to optimize energy efficiency and heat retention in cold rooms, it is essential to choose the insulation carefully, taking into account both expert recommendations and the specific application. This way, you can minimize the cost of maintenance in the long run.