Radiators, aluminum specifications

Radiators technical characteristics which may differ significantly from each other in a variety of manufacturers, are becoming increasingly popular among private property owners.These heat transfer devices nowadays are made using the most modern technologies and materials.They have high performance, are lightweight, compact and fit perfectly into any interior.

interest in aluminum radiators is constantly growing, but be aware that they are by no means universal.To avoid mistakes in the choice of batteries for the specific conditions of installation and operation, it is necessary to pass a small "educational program" for these instruments, to get acquainted with the peculiarities of their devices with the proposed models in the market.

What primarily take into account when choosing aluminum panels?

Each of the manufacturers, advertising their products certainly asserts its reliability and durability.However, in fact, experts in one voice is not recommended to install aluminum radiators for heating circuits connected to the central system.Her work is often characterized by instability - possible or just hammering sharp pressure drops with a large amplitude can damage the internal channels and the fittings of the heating device.Additionally, the coolant at the central heating can be quite low purity and quality, containing acidic or alkaline conditions, which is also not benefit the aluminum surfaces, since this metal is difficult to attribute to chemically inert.

Therefore, it is reasonable to assert that the aluminum radiators are suitable mostly for autonomous systems of private houses and apartments, where the owner is able to independently control the pressure and temperature in the pressure circuit, as well as chemical composition and quality of the coolant.

What you should know about coolants for heating systems?

excellent heat capacity of water is different, but not necessarily its use in the heating circuit is completely permissible or justified.In some cases it is necessary to resort to the use of special coolant for heating - about this in detail in a special publication of our portal.

sure to constantly keep in mind about an extremely large number of fakes, presented in a spontaneous sale at markets and even in some stores.In the manufacture of counterfeit trademark is generally used well-known brands in the "pure form" or invisible at first glance, the changes in the name or logo, but the quality of these radiators does not correspond to the original products of leading manufacturers.Traced regularity - the authoritative manufacturer, the more done imitations of its products.

therefore acquire aluminum radiators makes sense only in specialized shops, where the seller may present, and the buyer - carefully examine the quality certificates and technical documentation on the product purchased from the manufacturer's warranty.

types of aluminum radiators and their production technology

For the production of aluminum radiators are used alloys, which are special silicon supplements.Such metal becomes the raw material for the manufacture of individual sections, and whole future collectors radiators.Today used two primary aluminum battery technology - this extrusion and molding.

manufacturing extrusion heatsinks

Extrusion (from the Latin "push") is in the process of forcing molten metal softened through a special molding extruder in order to obtain the details of the desired profile.

This manufacturing method does not allow you to instantly receive radiator elements with a closed volume, so their production of the individual parts are formed at the beginning - front and back, which are then connected to each other by thermal compression.

extrusion method is used for the manufacture of individual sections, and whole collectors, who also initially are separate blanks, and fastened together by the already mentioned procedure.Collectors do immediately to size for future battery, so shorten or lengthen it during installation or operation will not succeed.

A similar technology is used in the production of radiators of brands such as "the Swing", "Olimp" and domestic - "RS-500".Performance

aluminum panels manufactured by extrusion, is significantly lower than other types of radiators, because they have less surface area and, accordingly, have a low emissivity.

The weakest point of aluminum radiators, produced by extrusion are Pressing joints, which often can not withstand loads from high blood pressure, first of all subject to corrosion from aggressive coolant medium.

second distinct disadvantage extrusion of aluminum radiators is considered to be susceptibility to corrosion.The fact that their secondary aluminum production is most commonly used, and feedstock for extrusion may comprise a plurality impurities activating oxidative processes in the alloy.

However, this is not always the case.Some manufacturers, such as, for example, the company «ROVALL», made of extruded alloy radiators, consisting of 98% of the purified aluminum, which significantly reduces the risk of gas formation within the instrument.But the subsequent chemical treatment of products makes the internal surfaces of virtually immune to corrosion processes.

production of aluminum radiators for casting technology

Aluminium radiators manufactured by casting technology, are made of aluminum alloy with silicon additives, the total silicon content of not more than 12% of the total composition.This is enough to make the strength of the product and preserve the unique qualities of thermally conductive aluminum.

manufacturing process looks like this:

• form casting radiator section consists of two parts.Before pouring the molten part of the joint under pressure in the injection unit.
• Then, the alloy through special channels is sent to the plunger ready form.
• molten mass fills all the channels form, and in it, cooled, crystallized.
• Then, the mold is opened and the workpiece is left to the final cooling.
• castings removed from the molds and made their treatment - stump fin.
• Thereafter, the procurement sections welded neck.
• Then go to the section on leak tests, which are conducted in a special bath at high pressure.
• next step is carried out etching corrosion preventive compounds of aluminum walls inside and outside.
• after anti-corrosion treatment is cooled and dried sections.
• Further, the section comes to painting with epoxy resin powder enamel.
• next stage of the section going into the radiators and sent for testing - for strength and tightness.

Of course, the manufacturing process in this case is depicted only in general terms, since different manufacturers technological nuances may differ slightly.

Foreign, mostly European manufacturers produce aluminum radiators is mainly injection method, because such products in practice perform better safety and product durability.

Some companies, for example, the same Italian company «ROVALL», used in the manufacture of aluminum radiators hybrid technology, molding not one, but two - three block section, which later joined with electro-welded collector.Thereafter, the blocks consisting of several sections, connected with silicone gaskets nipples, which allows, if necessary, adjust the design dimensions.For example, in the case of damage to one of the battery blocks do not have to replace it completely - just be enough to dismantle the damaged part and install a new one.

other manufacturers developed and put into production two-channel section of the radiator.Such batteries are, for example, the model number of the company «Faral Trio».They are characterized by a high resistance to stress baric (pressure to atmospheres) and have an enviable heat - about 210 watts from the section.For the production of such radiators used special alloy cast billet in a special process and canals with special milling cutters having a circular cross section.

sure to be said about the radiator fins, as the amount of heat exchange fins, heat transfer depends directly.Thus, the company "Alterplast" produces battery «Radena» with sections equipped with six ribs.

This device design promotes intensive heat exchange, we get not only because of the high heat transfer from the fins themselves, but also a directed flow of heated air convection.In addition, the multi-rib pattern radiator convection component predominates over the direct radiation and heated air directional flow provides a kind of curtain for window apertures, thus blocking the penetration of cold air into the room.

Video: the process of production of aluminum radiators «Global»

Anodized aluminum radiators

anodized battery, as mentioned above, made of an alloy in which the highest purification aluminum covers about 98% of the totalcomposition.These products are subject to anodic oxidation of all surfaces, both internal and external.

Anodizing - is anodic oxidation or electrochemical.It is one of several existing technologies for creating an oxide protective or decorative film.A similar process is carried out in solid or liquid electrolytes, and at its end aluminum surfaces become highly resistant to corrosion and other destructive chemicals.

Standard process of anodizing aluminum radiators is as follows:

• Preparation products to the main process called flushing.This process operation is carried out by placing the radiators or sections in a bath with an alkaline solution, which removes from the metal surface oil stains and other contamination.
• The next step is the "chemical milling" or etching.This step is to remove aluminum from the surface of the natural oxide film and an upper metal layer very thin.Usually used for this operation on the basis of the compositions of caustic soda - NaOH.
• neutralization or bleaching - the removal from the surface of aluminum present in the alloy of heavy metals.
• Anodizing is done by immersing the radiator in a bath of electrolyte.Aluminium is in this case positively charged electrode - the anode, electrolyte and - a negative, and under the influence of an electrochemical reaction occurs, and as a result of which is formed a protective oxide film Al2O3.
• Further, if the assumed adsorption staining occurs, that is, the pigment ink penetration into the pores of the protective film formed previously.
• The final stage is a seal layers - clogging pores.For

radiator connection elements are used instead of anodized exterior nipples dry clutch, so the inner surface at the joints and no restriction is smooth.With this connection, the battery is formed within the stagnant processes, and the coolant circulated with minimal flow resistance.

Anodized radiators have high heat dissipation, greater than that of conventional aluminum panels, and able to withstand pressure up to 50 ÷ 70 atmospheres.Of all the aluminum panels only they can fully comply with the terms of central heating systems.

Today the Russian market represented anodized heat sinks the Italian company «Aluwork», which have different sizes and color gamut.

only significant "minus" of the variety of aluminum radiators you can call them a high enough price.

nuances of selection and installation of aluminum radiators

General characteristics of aluminum radiators, except the anodised, have roughly the same parameters, in addition to the operating pressure.

General settings aluminum panels

General settings aluminum radiators are as follows:

• Operating pressure - 6 ÷ 16 at.
• heat dissipation (power section) - 80 ÷ 212 watts.
• Weight of one section - 0,8 ÷ 1,47 kg.Capacity
• one section varies from 250 to 450 ml.
• maximum coolant temperature - 110 degrees.
• service life in compliance with the operating conditions - up to 25 years.
• warranty from the manufacturer - from 10 to 15 years.

Standard battery spacing (distance between the upper and lower horizontal channel) is generally 200, 350 and 500 mm.However, if desired, can be found or ordered radiators with this option, reaching up to 900 and even 2000 mm.

Not to be mistaken with the size of the acquired unit, it is necessary to fathom the place where the battery will be installed.It should be borne in mind that the radiator must not rest against the window sill, if it is installed under the window opening, as is necessary to enable the free convection, ie hot air going up, should rise freely, preventing the penetration of cold air coming from the window.

Recommended distance from surrounding heat sink surfaces comprise:

• Above the sink space to be not less than 100 mm from the window sill or shelf (niche).