If you decide to equip the heating system for a cottage or a country house, then you need to think about efficiency, maximum reliability and ease of operation.
Features of arrangement
If we are talking about forced circulationthe heat carrier in the pipeline system, then in the course of the work it will be necessary to install a pump that should be located on the section of the heating main. Due to this interaction, it will be possible to provide faster and more constant movement of water. As a disadvantage in this case, you can allocate the cost of installing additional equipment. If you are interested in the heating scheme (with natural circulation) of a private house, then there will be no need to install the pump. This is because the density of hot water is much lower than that of cold. Due to this, the ejection of one fluid is another. The coolant, moving along the line, gives a certain part of the heat to the batteries, gradually cooling down. Returning back, cold liquid will force hot and light water back into the pipes. This cycle repeats constantly. The process can not be suspended until the boiler is heated. If there is a need, the heating circuit with natural circulation (for a private house in the first place) can be supplemented at any time by a pump that the owners can use if necessary for heating the dwelling quickly and evenly.
Main positive characteristics
The presence of a pump incurs additional costsfor electricity. On the contrary, its absence allows saving well. Such systems are completely silent and do not cause unnecessary vibrations. The heating system of a private house (with natural circulation) "Leningradka" has a lot of advantages, among them are the unique ability to self-regulation, a very long period of trouble-free operation, which is 30 years old, thermal stability and high maintainability.
Preparation for work
If you decide to make yourselfinstallation work, then you should consider the heating scheme (with natural circulation) of a private house. The contour will contain a specific set of elements. Among other things, it has: expansion tank, located at the highest point; pipeline, which can be single or double; heating radiators, as well as boiler equipment. The latter will heat the coolant. Before starting work, it is important to remember that the speed and power with which water will move through the heating system depends on the volume, weight, and density of the hot liquid. The inner diameter of the pipes plays an equally important role; the resistance coefficient and the height of the installation of heating radiators relative to the boiler depend on this parameter. The master must know that special requirements are imposed on horizontally oriented pipelines. They must be installed with a mandatory slope, which is 5 millimeters per meter, turning the pipe in the direction of movement. Only in this way the cooled water will tend to the boiler. The heating scheme (with natural circulation) of a private house involves the installation of a smaller number of elements in the path of the coolant, which would be able to increase the resistance.
Power calculation before installation
If you have chosen a private heating schemehouse with natural circulation, then before starting the system arrangement it is necessary to determine the power of the boiler equipment. To perform such calculations can be any of the following methods. The first involves the use of volume, the second - the area. The master should remember that each of these options allows you to get only approximate results under the most ideal conditions. If the building is not insulated, you should purchase equipment with a small margin. Whereas for energy-saving buildings, it will suffice to take as a power value per square meter a figure within 60 watts.
Determination of power by volume
If you will be implemented heating schemeprivate house with natural circulation, the most accurate will be the calculation of the volume of the heated room. Initially, to determine this value, multiplying it by 40 watts. The next step is to add correction factors. If we are talking about a private house, and the room is bordered by the street above and below, then you need to multiply the result by 1, 5. If there is a room that is located near the insulated wall, the value should be multiplied by 1.1. In the presence of an uninsulated wall, multiplication is carried out by 1.3. As for each door that goes out, for them you need to add 200 watts. It is necessary to add 100 W for the window, the indicator equal to 70 acts as the minimum value, the coefficient in each case will depend on the dimensions of the opening.
Determination of power by area
If the closed system will be equippedheating a private house with natural circulation, it is possible to calculate the power and the area. The simplest method is to determine the power of the boiler according to the recommendations of SNiP. It is assumed that 1 kW of power is required per 10 square meters. The total area of the house should be multiplied by 0.1. It is important to take into account different coefficients, each of which is used for specific territorial areas. For example, for the Far North, this figure may vary in the range from 1.5 to 2. For the middle band, these figures vary from 1.2 to 1.4. If we are talking about the southern regions of the country, the coefficient can be equal to 0.8-0.9.
Installation work: two-pipe system
Water heating system of a private house withnatural circulation can be arranged on a two-pipe scheme. Despite the fact that the installation works in this case are more complex, this scheme has become widespread. In its implementation, the liquid will move through two pipes, one of which is to be laid on top, where the heated water will flow; while the second is to be positioned below, the cooled liquid will flow there.
Technology of work
If you are considering the scheme and featuresinstalling heating (with natural circulation) of a private house, then you can use a two-pipe system. Carrying out these works involves the observance of certain instructions. At the first stage, the master must choose the place where the storage unit will be located.
The expansion tank is mounted above the boiler, andYou can connect these elements to each other with a vertical pipe, which, after installation, must be wrapped with insulation. Approximately at the level of one third of the expansion tank, it is necessary to embed the upper pipe intended for the transport of heated fluid. We measure the distance from the top point to the floor, after which we connect to the wiring. Produced data work at a height of 2/3. Closer to the top of the expansion tank is another pipe that will be an overflow. With it, the sewage will be removed surplus. In the next stage, pipes are supplied to radiators. Batteries need to be connected to the lower pipeline, which is installed in parallel with respect to the upper one.
Council of the master
When a private heating system is arrangedat home (with natural circulation) with your own hands, it is important to try to position the pipes as accurately as possible. At the same time, an optimal height difference between the boiler and radiators must be ensured. The first must be installed below the heating devices, so it is best to purchase a floor device that will be conveniently located in the basement or a special recess.
Nuances of works
Attic room must beinsulated. If the temperature in it is too low, then there is a possibility that the liquid in the pipes will freeze. It is important to adhere to several rules, one of which implies the location of the upper pipe with a certain slope, which should be approximately 7 degrees. If possible, the boiler equipment should be positioned much lower than heating devices. Visiting the store before starting work, you must choose a pipe made of metal or polymer. The internal diameter of the products should be 32 millimeters. Balancing two-pipe heating, if the pipes were chosen correctly, will not have to produce. However, it will be necessary to install the throttle on the connections to each radiator.
It must be noted that the gasket twocontours will be spent quite a lot of money. It will take a lot of time for the master, but such a system is more efficient and preferable.
Installation of one pipe system
If you will build a heating systemprivate house (with natural circulation), photos of such schemes, it is desirable to consider even before the start of work. If you decide to use a single pipe system, you can reduce installation costs. At the same time it will be necessary to lay only one pipe. The system will have a cyclic closed loop, which assumes that the radiators are located parallel to the main ring. Breaking it at certain points is not required. It will be possible to equip each radiator with an air vent. Such a solution will provide an opportunity to get rid of air in each of the individual sections. To equalize the temperature, you will need to install chokes and thermal heads. Today one-pipe closed heating system is quite popular. In some cases, you can neglect the presence of a surge tank, thus isolating the coolant. As is known, in a forced system, the speed of movement of the coolant through the piping system depends on the performance of the pumping equipment. With the natural circulation things are different. To increase the speed of movement of water it is necessary to follow certain rules. Shut-off valves should be selected as correctly as possible, it is important to monitor the transitions of diameters. It is not necessary to supply the system with numerous turns, which can become an insurmountable obstacle to the coolant. The master should minimize any obstacles, trying to make the sections as straight as possible.
Recommendations for work
Similar heating system (with naturalCirculation) of a private house, the scheme of which assumes the presence of only one pipe, is equipped with products whose internal diameter can vary from 32 to 40 millimeters. The inner surface of the pipes should be as flat as possible, ideal, this is the only way to prevent the accumulation of sediments, but metal counterparts should not be considered at all.
Conclusion
The heating system of a private house with naturalcirculation, without radiators, will allow you to save a lot of money. However, before carrying out these works is worth considering the feasibility of their implementation.
