Now two rules for supplying the movement of the coolant through the pipes “Heating system with forced circulation and a design with a natural convective movement of network water.
How they differ and which scheme is more successful in a certain situation, we will try to tell.
The principles of heating in the schemes in question:
In the heating system of heat transfer from its generating installation (very often the boiler) to devices that guarantee the transfer of its air heated room (heat exchangers, convectors) is a consequence of the movement of the coolant through the structural pipes. To encourage circulation, two approaches are used:
The flow is formed due to the movement of its masses, which have different temperatures, and therefore, different density, hotter water seeks to take the largest point, giving way below the cooled (natural convection);
By creating the movement of the coolant with circulation (network) pumps.
Distinctive characteristics of the heating system with natural circulation and the conditions for its structure paying attention to the fact that heating without the use of network pumps seems easier constructively, when designing and editing, it is necessary to take into account a number of special recommendations, which are not significant for the scheme with unreliable motivation:
Naturally, it is necessary to provide for hydraulic counteraction of pipeline pipelines and take measures to reduce them (increase the diameters of the pipes);
When installing, slopes for the manufacture of stable flows should be strictly observed;
The boiler must be at the lowest point of the structure.
Tip: if it is impossible to heating and free placement of units, it will be better not to consider the design option with natural circulation at all at all.
The pluses of the structure with a compulsive motivation:
Due to the presence of the pump, heating has a more steady increase in resistance and the hydraulic regime in individual sections of the pipeline pipelines is not scary;
Because of this, when installing and designing a structure with compulsory circulation, pipes of smaller diameters are used, which makes less cost and metal consumption;
Due to the fact that they use pipes of smaller diameters, the volume of the circulating coolant and the inertia of the structure are smaller (heating is quickly heated and better regulated);
There is no need to execute marks and slopes of height, if there is a need, you can lay pipes along the free path;
Tip: with significant changes in the height of the heating components, it is naturally necessary to worry about the possibility of emptying the pipes and light filling, mounting the taps for fragmentation at the upper points, and in the lower for draining.
5. The design with compulsory circulation can work at very large pressure. This guarantees a large efficiency, which with excess reimburses energy expenditures to the operation of the network pump; 6. Heating with fake motivation makes it possible to fit a boiler or other thermal source in every comfortable place, including at the very top point, which is often used (roof boiler houses of high -rise buildings).The main thing: often, in the form of a argument against the selection of heating with compulsive circulation, the fact that when electrical supplies fails, it cannot work. Now this is a long time already resolved by the designers the question, there are energy-dependent boilers with an integrated network pump, which the current receives either from mounted acumulators, or from a generator included as a component of a heat-generating device.
The design with natural circulation is minuses and also disadvantages
