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How to choose a radiator

start our today's conversation about choosing water heating unit, we decided to stating two facts.

        The fact of the first. statistics firm " Time ", on the market of thermal units since 1993 and offers a wide range of radiators of all types , different sizes and capacities, says - for every 600-1000 heating devices when operating in urban environments there is a failure due to the mismatch between the characteristics of the operation of the device (pressure, corrosion, poor water treatment, etc.). It seems that it's not much, think of one unit of a thousand. If we consider that an average of five radiators bought an apartment, the same stats dramatically change its appearance - one of the 120, and, at best, in one of the 200 apartments, which are installed recently purchased radiators possible flood. Moreover, the radiator can fail both immediately and during the first three years of operation.
        The fact of the second. In the market of water heaters (radiators) is now present products of different designs and systems for at least 20 production plants in Europe, Asia and America. In most cases - are devices from recognized manufacturers. They differ mainly in the field of application. Accordingly, they are made of different materials with different technical and operational characteristics.

        Here's to you and the reason - to get lost in the present abundance is much easier than to understand. And it all is that the features are in each design, and heating system has a number of « national characteristics ». Let's start with the features of the heating system. Worldwide accepted two-pipe heating system - one tube coolant is supplied at the second tap. It implies a parallel connection of heating appliances. We are perhaps the only country in the world in which the coolant supply system remained one pipe. This system involves the use of large-diameter pipes in series connection of heating appliances. This requires the system to pump the largest possible amount of coolant for heating per unit of time, which entails a high performance heating both pressure and temperature. Which whatsoever regulate this system lends itself very bad, because as soon as you began to regulate one of Teplopribor changes immediately begin to happen in the rest of the heater. Two-pipe system is devoid of this shortcoming.

                Second, the West does not drain the heating system, it is constantly full. And this is a very important point, because corrosion processes in the system filled with air, are much faster than in the system filled with water. Third, the zealous owners in the west, bereguschie own heating system, start-up of the system (including recirculation pump circulates the water in the system) is carried out mainly through special converters. When this acceleration occurs smoothly and the pressure rises gradually. As for us it is much easier. It enables the switch, and the circulation pump delivers coolant at once at full capacity. Such a process leads to the inclusion of the so-called water hammer, that a « ramshackle » radiator.

        Consider the main types of heaters used.

       

                                        

            

Aluminium radiators. are made of a material having high thermal conductivity, but also places high demands on the chemical composition of the coolant. Great design execution majority radiator port must be installed on each device automatic valve for venting, as during operation there is an active release of hydrogen. Currently, the market offers a range of aluminum radiators as a working pressure up to 6 atm., And the operating pressure of 10-30 atm., Which implies the possibility of their use in urban areas.

The price of aluminum radiators range from 50 to 70 USD per kW.
 

            

                                        

            

Steel panel radiators - it is highly thermal units are designed in most cases the operating pressure 8,7atm., crimping 13atm. They are recommended for use in individual, low-rise buildings, and in the presence of an individual substation - in buildings of any height. And do not try to experience them at work in a system with multiple high pressures, especially where there is a possibility of water hammer (urban multi-storey building with a central heating system). Their term of office at the same time can be reduced to one year and even up to several months. In addition to the leaders of the production of steel panel radiators, such as the company « DeLonghi ». « KERMI »., « KORADO » and others. All the more common panel radiators Plant « DEMIR DOKUM » (Turkey) Series « DEMRAD ». Radiators « DEMRAD » characterized by high capacity, relatively low price and good quality.

The price of steel panel radiators range from 40 to 60 USD per kW.

Steel tubular radiators - this classic design radiators, organically fit in almost any interior space: the operating pressure of 10 atm., test pressure of 15 atm. wall thickness of tubular elements 1.2 (1.5 mm). In our market are mainly represented by brands « ARBONIA ». - Germany-Switzerland, « KERMI » - Germany). Complement the range of imported Radiators « PC ». and « PC-P ». Production: working pressure of 15 atm., test pressure of 22.5 atm. wall thickness of tubular elements 2.0 mm, 2.8 mm collector. Radiators " PC " and " PC-F " no restrictions on installing them in different heating systems of buildings of any height. The prototype of these is one of the last models produced by « KERMI ». Design changes to adapt the new radiators in the toughest conditions. Through the use of high-quality domestic polymer coating, it is practically the only ones in the world today heaters with robust internal corrosion protection ,.

The price of steel tubular radiators ranges from 100 to 160 USD kW - for imports and from 70 to 90 USD kW - for domestic.

Sectional bimetal radiator « SIRA ». (Italy) has a special place among all types of radiators. The combination of steel conducting channels and aluminum fins gave very good results. Radiators have a working pressure 15atm., Test pressure of 22.5 atm. and have no restrictions on installing heating systems in various buildings of any height. Bimetallic radiators " SIRA " and confirmed its high performance properties. (According to the statistics of the company " Time " the release of their system of radiators in real operation in real operation for 5 years, sales have been reported.)

The price of bimetallic sectional radiators « SIRA » It varies from 70 to 80 USD per kW.

Cast iron radiators are familiar to consumers. A classic example of this is the model of radiator « MC-140 » (working pressure of 9 atm., test pressure of 15 atm.), has been used for many years. Iron - a material with good thermal conductivity, neutral with respect to almost all of the coolant. That is why the cast iron radiators can be used in heating systems with poor preparation of the coolant (increased aggressiveness, pollution and so on.). In the domestic market can meet the production of radiators, the Czech Republic, Italy, Spain, as well as their counterparts.

In the past year in one of the factories of the CIS was held development and serial production of modern cast iron sectional radiators « 2K and 2K-60-6OP ». 2K and 2K-60-60P with a spacing of 500 and 300 mm. These radiators are taken from European analogues fine appearance and high quality, but deprived of their shortcomings and can withstand virtually any actually existing conditions.

The main advantages of radiators 2K and 2K-60-60P:

Working pressure is increased up to 12 atm., test pressure - 18 atm., which removes virtually all restrictions on the pressure in actual use;
Small container sections can effectively use thermostatic elements that confirmed the tests thermostats RTD-G, RTD-N firm Danfoss. Today it is the only domestic iron radiators, which allow you to effectively apply the automatic temperature control;
The high corrosion resistance allows you to use radiators in open systems with a high content of oxygen in the coolant;
The increased thickness of the walls, well resisting abrasion, allows the use of radiators with high content of solid particles in the coolant;
Increase the size of the connection of up to 1 1/4 " extends the application of radiators. The price of such radiators, ranges from 700 to 900 rubles. per kW.

A novelty of the season are cast iron radiators « RIDEM » production plant « Demir DOKYUM », Turkey. The company that produces these radiators built recently and that called for « the latest technology » - Automated production by almost 90%, workmanship is guaranteed by a process based on the latest achievements of science. Radiators « RIDEM » designed for a working pressure of 9 atm., test pressure of 15 atm., the maximum temperature of the carrier 110C. The radiator is characterized by high corrosion resistance, wide range of application, durability, strength, high heat dissipation, low flow resistance and, most importantly, the beautiful contemporary design. They are certified in Germany (DIN), British (BSI), France (NF). It is worth noting also the fact that up to 70% of the products sold in Europe (England, Germany, France). The price of these radiators varies from 55 to 70 USD per kW.
 

            

                                        

            

Summary. for cottage building and houses with individual heating units can use all types of heating devices, provided that you have correctly taken into account in the design of operating and test pressure to which calculated the selected radiator type, and, do not forget a small technical nuances peculiar to each type of radiators, for example, such as high gas emission in aluminum radiators or high thermal inertia of the cast iron radiators. The determining factors when choosing to be - the price, design, hygiene, compactness, etc.
 

            

                                        

            

For the urban areas (in heating old type) the choice will be determined mainly by the « vitality » heater in actual use.

The absolute leader here is the cast iron radiator. Good casting quality, high technical parameters and modern design of new domestic and foreign radiators further strengthen this leadership. Well in operation Bimetallic radiators « SIRA », which can be safely put in the second place.

stands out are more than three years in operation, steel tubular radiators domestic production « RS » and « BITERMO-RS-P ». Increased wall thickness, internal anti-corrosion treatment, the current level of production with the automation of basic technological processes allow these radiators called one of the most promising heaters.

And finally a little advice. When choosing a heater is required to consult with experts. s heat, and with these experts in heating technology.

            
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