How Does Cold Room Sandwich Panel Work?

Description

The Cold Storage Panels, is designed to maintain controlled temperatures in very specific rooms. For example, food handling, cutting rooms, temperature-controlled cold warehouses, anteroom of freezing chambers, and large logistics centers for handling cold products, etc. It is also used in other industries such as pharmaceuticals or laboratories that require low temperature rooms, no freezing conditions, to optimized the maintenance of pharmaceutical products.

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Our Cold Storage Insulated Panels comes in various polyurethane foam sizes, these are between 40 mm to 100 mm.  The sizes that are common in the United States are 50 mm, 60 mm, and 80 mm.  This inner layer, like the rest of the panels, is protected by two steel sheets, one on the upper surface and the other on the lower part. Its upper outline is very resistant. It is very simple to assemble, its union joints are composed of one side a rail, and the other a ridge, that when installed creates an airtight seal, which detains any exterior low temperature while maintaining in the interior part of the room, temperatures from 20 to 0 degrees Celsius. In this way, thanks to the Cold Storage Insulation Panels, it is posible to create a completly seal room, avoiding the termique leaks and allowing you to get a controlled temperature.

The main advantage of the Cold Storage Sandwich Panels is its price which is more competitive than ever, while having a low price, the panel maintains its quality, which characterizes us as selling a high-quality product.  When choosing to build a cold room with a sandwich panel, covering the inside portion of the warehouse, you can use the frigorific panel that is used for siding on the roof top, without any problem since it will not be exposed to meteorological aggressions. The mecanical resistance of the Cold Room Insulation Panel is given by its unique profile. The frets create an stronger surface protecting the interior for any external aggression

With our panel, you can get high insulation due to its polyurethane foam and great resistance, from its steel sheets. With all these characteristics combine we have the best Cold Storage Insulation Panels, which will withstand all kinds of temperatures, even below 0 degrees.

Characteristics

The Cold Room Insulation Panel is the most popular material among professionals in the food, agricultural and commercial sectors. When you need to keep food products at a constant temperature, Cold Storage Panels will be your best choice. Composed of two sheets of pe-lacquered steel, galvanized and profiled in white exterior and interior that protects inside an insulating layer of injected polyurethane of high density (40kg / m3). Responsible for providing levels of thermal insulation much higher than other traditional materials.

This Cold Storage Panels comes in thicknesses side 40 to 100 mm, selecting the correct thickness depends on the temperature you need to maintain inside the cold chamber and also depends on the recommendations that the United States Department of Health and Human Services (HHS). Hence, this will obtain the optimal insulation and operation ratio of the freezer generator. As an example, handling fruits that requires temperatures from 8 to 12 degrees.  It is recommended in this example to choose a panel that has a thickness between 60 and 80 mm thick, but taking into account the outside conditions and if the panel will be installed on the exterior or interior, and how large will the freezing chamber will be.

The installation of the Sandwich Panel for cold rooms is by means of a tongue and groove system, similar to that of standard polyurethane facades. But it is characterized by having an EPDM gasket with double ridges to prevent leaks. You don't need anything else to place the sandwich panel and seal its joint. It already incorporates a watertight EPDM joint that seals the union between panel and panel across the width being able to make chambers or rooms of any size in addition to any height. Only, from Panel Sandwich Group we always recommend completing the work with the health profiles, PVC pieces that are placed at the junction between panel and panel to improve the cleaning and hygiene of the cold rooms and cold rooms.

The installation for the Cold Storage Panels is through a tongue-and-groove system, similar to the standard panels used for siding, the difference is of having an EPDM gasket with double ridges that prevent thermal leakage. There aren´t any additional accessories need it to seal the joints, since it already incorporates a watertight EPDM system that seals the union between panels across the width, ideal for cool rooms of any size and high. When utilizing Frigorific Panels, in a cool storage room, where high hygiene is required, is recommended by Panel Sandwich Group, to use the sanitary PVC outline pieces that are placed at the junction between panels to improve cleaning and sanitariness.

In this article, you will learn the specifics of choosing sandwich panels for refrigerating chambers made of polyurethane foam (PUR), and where to buy sandwich panels you will find on our directory of refrigeration companies or post a tender on the website.

Please attention safety regulations in your country.

Most of the sandwich panels on the market are insulated with polyurethane foam (abbreviated as polyurethane foam or PUR) and metal sheathing on both sides. Also recently, polyisocyanurate foam (PIR) has become widespread. It has thermal insulation characteristics similar to polyurethane foam, but at the same time a higher degree of fire resistance, as a rule, EI30. It is possible to build fireproof partitions from PIR panels.

• Selection of panel thickness;
• Comparison of panels from different manufacturers.

Some manufacturers offer panels with expanded polystyrene insulation (EPS), which is also acceptable for thermal insulation of cold rooms, but since the thermal conductivity of the foam is about 1.5-2 times higher, then the panel thickness must be selected at least 20-30% more than for polyurethane foam sandwiches -panels. 

Please note that mineral wool; basalt sandwich panels widely used in construction are not suitable for thermal insulation of refrigerating and freezing chambers due to their high moisture absorption. This leads to a rapid loss of the thermal insulation properties of the material because of moisture impregnation. In addition, the thermal insulation characteristics of mineral wool are significantly inferior to polyurethane foam.

When ordering heat-insulating sandwich panels, keep in mind that with small purchase volumes, you will be offered panels of standard length and, accordingly, you will need to buy sandwich panels, taking into account waste for cutting the panel for the dimensions of your chamber. When purchasing panels from several hundred sq.m. you can count on custom-made panels in the size you need, but the delivery time will be longer than when buying ready-made panels from a warehouse.

Selection of panel thickness

When choosing a panel thickness, it is important to consider several parameters:

• temperature difference - the maximum possible delta between the temperature inside and outside the chamber during operation;

• indoor humidity. In rooms with high humidity, the thickness of the thermal insulation must also be increased to prevent condensation on the surface of the panel.

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• the presence or absence of solar radiation, i.e. direct sunlight, such as outdoor installations, or direct sunlight through an indoor window.

A specialist, taking into account several more parameters, can do an accurate calculation of the required panel thickness for the refrigerating chamber but for ordinary, typical cases of storing products in a restaurant or store, you can focus on the following recommendations:

• 80mm panel is sufficient for cold storage (medium temperature storage range + 10 / -5C),

• panel 100mm for the freezer (low temperature storage range -15 / -20C).

Please attention: there is needed more thickness of the insulation about 20-50% in hot regions.

As we have already noted above, for thermal insulation made of foam plastic, non-standard operating conditions, as well as for freezing chambers, the thickness of the thermal insulation is required more. In these cases, for the selection of the thickness of the sandwich panel, it is advisable to contact specialized refrigeration companies selling cold stores or sandwich panels.

Comparison of panels from different manufacturers

What you should pay attention to when buying sandwich panels:

• The type and thickness of the metal sheathing.

To reduce the cost of production, meeting the wishes of consumers, manufacturers offer panels with various types of cladding and metal thicknesses.

If price is a priority for you when choosing, then you can opt for a metal sheathing with a thickness of 0.5 mm. Manufacturers offer even less, but such products, as a result, have less rigidity and dents easily appear on them during installation and operation. Moreover, ceiling panels can bend. A good thickness for "work" with the panel during installation and long-term operation is the thickness of the metal 0.55-0.7 mm. Some, usually foreign manufacturers, offer panels with a thickness of 0.8mm, but as a result, they are noticeably more expensive than the average price on the market.

In addition, the price of PPU panels depends on the quality of the metal. All panels are made of galvanized sheathing with various paints and varnishes, plasticizing and other types of coatings, on which the corrosion resistance and service life of the material depend.

Check the thickness of the metal and the type of panel coating when buying and comparing prices from different manufacturers in order to make an informed choice.

For additional savings, you can buy galvanized unpainted steel panels with metal sheathing. However, this is acceptable only for external cladding and only for installation inside dry rooms, the internal paneling of the panel must necessarily have a protective coating, since the humidity in the refrigerator is high, as a rule, at least 70%. This saving option is more suitable for "covering" a small room with sandwich panels. Nevertheless, the amount of savings will be insignificant.

• The quality of thermal insulation.

As we have already noted, the vast majority of sandwich panels for cold rooms, warehouses. They used with thermal insulation made of polyurethane foam or, a new material, polyisocyanurate, which has a high degree of fire resistance.

The quality of thermal insulation can be determined by the characteristic of its thermal conductivity, which fluctuates around 0.019-0.025 W * K / m for PUR. Accordingly, the lower this figure, the better the thermal insulation. For comparison, a cheaper material, expanded polystyrene insulation (EPS), has a thermal conductivity of 0.038 * K / m.

The structure of the polyurethane foam must be porous, uniform throughout the entire volume of the panel, without air bubbles.

Qualitative characteristics of the thermal insulation layer, which we recommend to pay attention to when purchasing moisture absorption, strength under mechanical loads and others, which you can clarify by requesting a test report from the product manufacturer or his dealer.

When installing a small chamber of an economy version on your own, these parameters may not be so important, but when ordering a medium-sized chamber (from 100 cubic meters), and even more so when building a cold storage, it is reasonable to approach the choice of sandwich panels with all care and attract specialists for consultations.

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