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. |
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. |
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. |