An optimal climate is the key to the effective functioning of the greenhouse even in conditions of absolute sealing. The winter period of time, characterized by lower temperatures and the effect of the greenhouse effect, determines the search for additional heat sources that can provide an optimal climate in a confined space. The age of innovation allows us to abandon the arrangement of a traditional heating system and take advantage of the alternative energy consumption system, to which increased demands are made. That is why it should be not only highly productive, but also the most profitable from an economic point of view. Geothermal heating, the principle of which is based on the functioning laws of nature and the use of renewable resources, meets the above requirements as much as possible.

Content

1. Geothermal heating of the greenhouse. Principle of operation
2. Advantages of a geothermal convection system
3. Design features of a geothermal heating system
4. The sequence of actions during the installation of the geothermal system  video

Geothermal heating of the greenhouse. Principle of operation

The geothermal heating of the greenhouse is designed taking into account the fact that the temperature of the soil lying deep in the bowels of the earth is in the range of 10-12 degrees in the summer and 6-8 degrees in the winter.

It increases many times under the influence of the greenhouse effect and the energy of solar radiation, which is quite enough to provide optimal climatic conditions in a closed greenhouse space. Thus, the operating principle of the geothermal heating system is based on the use of the energy potential of the earth and its multiple increase using specialized equipment.

The energy potential of soil and groundwater is converted into heat, which is subsequently transferred to a specialized heat carrier.

This is due to the operation of heat pumps for geothermal heating, from a functional point of view, representing a device designed to transfer and increase thermal energy received from a source with a lower potential. Modern geothermal pumps are high-tech, environmentally friendly equipment that does not emit harmful substances during the work that harm the human body and often destroy the ozone layer.

Advantages of a geothermal convection system

Given that alternative methods of generating energy (which is the geothermal heating system) are often quite skeptical, the convection geothermal heating system is obviously a pleasant exception. Despite the rather complicated installation principle and the high cost of equipment for geothermal heating, such systems have a huge number of significant advantages that compensate for all material and labor costs without problems.

Consider the main ones:

1. The main advantage, thanks to which it is worthwhile to deal with the equipment of a geothermal heating system, is the maximum environmental friendliness and the highest productivity with the minimum consumption of energy resources;

2. Absolute independence from electricity: thermal installations of a similar profile can function due to the energy consumption of water, soil or air;

3. A long operational period, according to experts, a standard geothermal heating system can function effectively for at least 50 years;

4. The ability to constantly maintain optimal microclimatic conditions in the greenhouse by regulating the relative humidity of the air, which ensures the creation of a soft and balanced microclimate with the possibility of constant regulation of ventilation and humidity indicators;

5. The ability of problem-free heating of the premises, characterized by a large area (more than 150 sq. M), as well as ensuring its heat supply.

Design features of a geothermal heating system

As mentioned above, the construction of geothermal convection systems is associated with certain difficulties, the main of which is the placement of the main functional elements of the system deep underground.

The construction of an alternative energy supply system is associated with the installation of underground utilities, which necessitates large-scale excavation. But, despite this, the construction of geothermal heating, the cost of equipment for which is much lower, relative to the costs required for the organization of electric or gas heating.

The design features of the geothermal system are complex only at first glance, however, having delved into its essence, you can easily organize a system of alternative energy consumption with your own hands. Its design implies the presence of two circuits located both in the greenhouse and underground. The first is required for heating the room itself, and the second is necessary for collecting heat in the bowels of the earth, that is, in fact, due to it, heat exchange occurs.

Installation of the described heat exchanger can be carried out either below the freezing point of the soil layer, or in reservoirs for which freezing is not characteristic. A thermal carrier is poured into the pipe of the circuit located underground, the role of which is purified water, or water diluted with antifreeze in certain proportions. The coolant is designed to collect thermal energy deep in the bowels of the earth, which is subsequently transferred to a heat pump equipped with two heat exchangers.

The sequence of actions during the installation of the geothermal system

1.Before you start installing geothermal heating, you must create a project that is being developed long before the construction of the greenhouse. However, it is important to remember that the calculation of the density of the ducts, which should be at least 2.7 m per square meter of the heated room, should also be carried out at the design stage;

2. Further on a plot of land selected for the construction of the greenhouse, a pit is organized, the depth of which corresponds to the level of winter freezing of the soil (for a middle strip of about 3 m). You can cope with this task both manually and use heavy construction equipment;

3. We must not forget about the need to isolate the slopes of the pit, which is done using polystyrene plates at a depth of 0.7 m. Subsequently, the bottom of the pit is successively covered with small gravel, a 30-cm layer of sand and carefully compacted;

4. Subsequently, the project features include the laying of air ducts, which is carried out in accordance with previously prepared circuits. In the role of air ducts are PVC pipes, the diameter of which is 110 mm, fixed with a wire. It is important to observe the distance from the walls of the freshly dug pit, which should not be less than 30 cm. Next, the pipeline is mentally divided into separate sections equal to 2 m, connected in the center by tees. The central branch along the longitudinal axis is brought to the surface;

5. The lateral branches of each of the sections are likewise brought to the surface and, like the central ones, are protected by polyethylene membranes. At the end of the installation of the system, it must be sprinkled with earth to the upper thermal insulation border;

6. The plot, the area of \u200b\u200bwhich is obviously slightly larger than the area of \u200b\u200bthe greenhouse, is covered with polystyrene foam along the perimeter and covered with soil;

7. Further, in fact, it is necessary to start building the greenhouse itself, and only then build up the central branches of the duct so that the end sections of the pipes are located at a distance of 30 cm from the roof of the greenhouse. Lateral branches at the same time do not need building;

8. At the final stage of installation at the end sections of the duct, the exhaust ventilation equipment or filter installation is installed.

Author: Sergey and Svetlana Khuentsov

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