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Under the concept of the heat pump, the combination of aggregates intended for the accumulation of heat energy from various sources in the environment and the transfer of this energy to consumers is implied.

For example, such sources may have sewage risers, waste of various large productions, highlighted when working heat from various power plants, etc. As a result, the source can perform various media and bodies having a temperature of more than one degree.

The task of the heat pump is to transform the natural energy of water, earth or air into thermal energy for the needs of the consumer. Since these types of energy are constantly self-assessing, then we can consider them a limitless source.

Heat pump for heating home principle

The principle of operation of thermal pumps is based on the possibilities of bodies and media to give their thermal energy to other than the same bodies and environments. This feature distinguish different kinds Thermal pumps, in which the energy supplier and its recipient are necessarily present.

In the title of the pump in the first place, the source of thermal energy is indicated, and on the second type of carrier, which is transmitted to the energy.

In the design of each heat heating pump, 4 main elements are distinguished:

1. A compressor designed to increase the pressure and temperature of the steam arising from the boiling of freon.
2. The evaporator representing the tank in which freon from the liquid state goes into gaseous.
3. In the condenser, the refrigerant transmits thermal energy internal contour.
4. Through the throttle valve, the amount of refrigerant comes into the evaporator is regulated.

Type of thermal pump Air air denotes that thermal energy will be taken from the external environment (atmosphere) and transmitted by the carrier, just as air.

The principle of operation of this system is based on the following physical phenomenon: medium in a liquid state, evaporated, lowers the surface temperature, from where it dispels.

For clarity, briefly consider the refrigerator freezer mode. Freon, circulating on the tubes of the refrigerator, takes the heat from the refrigerator and is heated itself. In consequence, the heat collected by them is transmitted to the external environment (that is, the room in which the refrigerator is located). The refrigerant is then compressing in the compressor, cool again and the cycle continues. The air thermal pump works on the same principle - takes heat from outdoor air and heats the house.

The design of the unit consists of the following parts:

• External pump block represent compressor, evaporator with fan and expansion valve.
• Heat insulated copper tubes serve to circulate freon
• Condenser, with a fan located on it. It serves to disperse already heated air along the area of \u200b\u200bthe premises.

When operating the air heat pump when heating the house, the following processes occur in a certain order:

• Through the fan, the air from the street is drawn into the device and passes through an external evaporator. Freon, which makes a cycle in the system, collects all the energy of the heat from outdoor air. As a result, it goes into gaseous from the liquid state.
• In the future, the freon gaseous is compressed in the condenser and goes into the inner block.
• Then gas passes into a liquid state, while giving the air room accumulated heat. This process occurs in the condenser located indoors.
• The surplus of pressure goes through the expansion valve, and Freon in a liquid state goes to a new circle.

Freon will constantly take thermal energy from outdoor air, as its temperature will always be less. An exception is the case when strong frosts on the street. In such conditions, the effectiveness of the thermal pump will decrease.

To increase the power of the unit, the surfaces of the condenser and evaporator maximize.

As with each complex device, the air thermal pump has its pros and cons. Of the advantages it is worth highlighting:

1. Depending on the need, the unit can increase or lower the heating temperature of the house.
2. A pump of this type does not clog the environment with harmful fuel combustion products.
3. The device is easily installed.
4. The air pump is absolutely safe in terms of fire.
5. The heat rate coefficient pump is very high compared to energy consumption (1 kW of electricity spent accounted for 4 to 5 kW of heat released)
6. Available at affordable price.
7. The device is convenient when used.
8. The system is controlled automatically.

Of the minuses of the air system, it is worth mentioning:

1. A small noise created during the operation of the device.
2. The efficiency of the device depends on the ambient temperature.
3. At low street temperatures, electricity consumption increases. (below -10 degrees)
4. The system is entirely dependent on the availability of electricity. The problem can be solved by installing an autonomous generator.
5. The water pump can not be heated water.

In general, air-air devices are perfect for heating wooden houseswho, due to the peculiarities of the material, are reduced by natural heat losses.

Before choosing an air pump, it is worth finding out the following key points:

• Indicator insulation of rooms.
• Quadrature of all rooms
• Number of people living in a private house
• Climate conditions

In most cases, 10 square meters. The room should account for about 0.7 kW of the device power.

Heating pumps for home heating water water.

With the arrangement of the heating system in a private house, water-water class systems are well suited. In addition, they will be able to provide a housing with hot water. Various reservoirs, groundwater, etc. will be suitable as sources of natural heat.

The water of the pump water is based on the law that the change in the aggregate state (from the liquid in gas and vice versa) of the substance, under the influence of various factors, the release or absorption of heat energy is involved.

Such a type of pumps can be used for home heating even at low ambient temperatures, since plus temperature remains in deep layers of the earth.

Principle of operation of the heat pump water water is as follows:

• The special pump drives water through copper tubes of the system from an external source to the installation.
• In the device, water from the environment affects refrigerant (freon), the boiling point of which is +2 to +3 degrees. Part of the heat of water is transmitted by Freon.
• The compressor sucks the gaseous refrigerant and compresses it. As a result of this process, the temperature of the refrigerant increases even more.
• The freon is then sent to the condenser, where it heats the water to the required temperature (40-80 degrees). Heated water enters the pipeline of the heating system. Here, Freon returns to the liquid state and the cycle begins again.

It is worth noting that water-water devices are used for home heating with an area of \u200b\u200b50-150 sq.m.

When choosing a device of this class, pay attention to certain conditions:

• As an energy source, preference should be given to open reservoirs (lightering of pipes), at a distance of no more than 100 m. In addition, the depth of the reservoir for more northern areas should be at least 3 meters (at such a depth, water usually does not freeze). Pipes supplied to water should be insulated.
• Water rigidity strongly affects the work of the pump. Not every model is capable of functioning when high indicators rigid. As a result, prose of water is taken before purchasing the device and based on the results obtained, the pump is selected.
• By type of work, the aggregates are divided into monovalent and bivalent. The first will perfectly cope with the role of the main source of heat (due to its high power). The second can perform an additional source of heating.
• His efficiency increases with the power of the pump, but at the same time increases the consumption of electricity.
• Additional device features. For example: housing with noise insulation, water heating function for household needs, automatic control, etc.
• To calculate the necessary power of the device, the total area of \u200b\u200bpremises is multiplied by 0.07 kW (energy indicator per 1 sq.m.). This formula is valid for standard rooms, with a height of not more than 2.7 m.

Many participants of our portal have long been using thermal pumps and consider them the best heating. The heat pump is still expensive, and his payback period is large. But there are successful experiments of independent manufacture of heat pumps: it avoids some unreal costs.

• Principle of operation of the heat pump
• How to make a heat pump do it yourself
• Is it profitable to do a thermal pump

Principle of operation of the heat pump

Explaining the principle of operation of the heat pump, people often recall the refrigerator, where heat, "removed" from products in the chamber is discarded in the radiator on the rear wall.

Saga Member Forumhouse.

Principle of operation of the heat pump, like a refrigerator: The grille on its back is heated, the freezer is cooled. If we lengthen the tube with freon and lower them into the bath, then the water in it will be cooled, and the grid of the refrigerator is heated; The refrigerator will pump heat from the bath and warm the room.

The same principle employs air conditioners, and heat pumps. The operation of the instruments is based on the carno cycle.

The coolant moves along soil or water, in the process "removing" heat and increasing its temperature by several degrees. In the heat exchanger, the coolant gives accumulated heat of the refrigerant, it becomes a ferry, enters the compressor, where its temperature rises. In this form, it is supplied to the capacitor, gives heat heat carrier at home, and cooling, turns into a liquid again and enters the evaporator, where he is heated from the new portion of the heated coolant. The cycle is repeated.

Although the heat pump will not work without electricity, this is a favorable device, since it is 3-7 times more heat than heating electricity.

We will analyze it on a specific example of our user who made the heat pump with their own hands.

Thermal pumps operate on the energy of natural sources of the body:

• soil;
• water;
• air.

Collect warm from the soil (below the drainage depth of its temperature is always about +5 - +7 degrees), in two ways:

• horizontal soil collector
• laid horizontal different ways Pipes.

The pipes flowing "brine" - on Forumhouse, propylene glycol often use, which takes the heat of the Earth, transmits it to the refrigerant, and cooled, goes back to the soil collector.

The heat pump is a device that can provide your home heating in winter, summer cooling and hot water production all year round.

The heat pump uses the energy of renewable sources - heated air, earth, rock breeds or water - for the production of thermal energy. This transformation is carried out with the help of special substances.

The principle of action of the thermal pump

Structurally, any thermal pump consists of two parts: the outer, which "takes" the heat of renewable sources, and internal, which gives it heat to the heating system or air conditioning. Modern thermal pumps are characterized by high energy efficiency, which in practical terms means the following - consumer, i.e. The owner of the house, using a heat pump, spends heating or cooling his dwelling, on average, just a quarter of the money he would have spent if there was no thermal pump.

In other words, in the system with a thermal pump of 75% of useful heat (or cold) is ensured due to free sources - the heat of the earth, groundwater or heated in the premises and emitted to the street used.

Consider how it acts perhaps the most popular thermal pump working at the expense of the heat of the Earth. The work of the heat pump occurs in several cycles.

Cycle 1, evaporation

The outer part of the "earth" heat pump is a closed pipe system, buried to the ground to a certain depth, where the temperature is stable all year round and is 7-12 ° C. To "collect" a sufficient amount of energy of the Earth, it is required that the total area occupied by the underground pipe system was 1.5-2 times the entire heated area of \u200b\u200bthe house. These pipes are filled with a refrigerant, which heats up to the temperature of the Earth.

The refrigerant has a very low boiling point, therefore it is capable of putting into a gaseous state at a soil temperature. Next, this gas enters.

Cycle 2, compression

It is this compressor that consumes all the energy necessary for the operation of the heat pump, but compared, for example, with heating from, these costs are noticeably lower. By comparing costs, we will return later.

So, heated to a temperature of 7-12 ° C, the gaseous refrigerant from underground pipes in the compressor chamber is strongly compressed, which leads to its sharp heating. To understand this just remember how the usual cycling pump is heated when you pump the tire. The principle is the same.

Host on a note

"Thermal pump is modern heating. But the real values \u200b\u200bof the effectiveness of heat pumps depend on the temperature conditions, i.e. In cold days, their effectiveness falls. It is about 150% at temperatures -20 ° C, and about 300% at a source temperature of +7 ° C. "

Cycle 3 condensation

After the compression cycle, we got hot steam under high pressurewhich is already served in the inner, "home" part of the heat pump. Now this gas can be used for air heating system or to heat water in the water heating system and hot water supply. Also, this hot pair can be used with the "" system.

Giving heat into the heating system, hot gas is cooled, condensed and turns into a liquid.

Cycle 4, expansion

This liquid enters the expansion valve, where its pressure decreases. Now the low-pressure liquid refrigerant is again sent to the underground part to heating to the temperature of the Earth. And all the cycles are repeated.

Efficiency of heat pumps

For each 1 kW of electricity consumed by the heat pump to work its compressor, on average, about 4 kW of the useful thermal energy is produced. This corresponds to 300% of efficiency.

Comparison of heating with a heat pump with other methods.

The data are represented by the European Association of Heat Pumps (EHPA)

It should be understood that the performance of thermal pumps differ, depending on the specific conditions in which your device acts. So, if you use the "earthy" heat pump, and you have clay soil on the site, then the effectiveness of the heat pump will be roughly twice as much as if the pipes of the heat pump were lying in the sandy soil.

It should also be remembered that the underpassing should be labeled below the ground freezing mark. Otherwise, the heat pump will not work at all.

The real values \u200b\u200bof the effectiveness of thermal pumps depend on the temperature conditions, i.e. In cold days, their effectiveness falls. It is about 150% at temperatures -20 ° C, and about 300% at a source temperature of +7 ° C. But technology does not stand still - modern models are of greater energy efficiency, and this trend is preserved.

Heat pumps for cooling at home

According to its principle, the thermal pump is similar or. Therefore, in the summer, it can not be used for heating at home, but for cooling or conditioning. Recall that, if we are talking about "earthy" heat pump, then the temperature of the soil is stable in the range of 7-12 ° C year-round. And with the help of a heat pump, it can be transmitted to the premises of the house.

The principle of operation of the cooling system with a heat pump is similar to the heating system, only instead of radiators are used. With passive cooling, the coolant simply circulates between the fan coils and the well, i.e. The cold from the well enters the air conditioning system directly, but the compressor itself does not work. If passive cooling is not enough, the thermal pump compressor is turned on, which additionally cools the coolant.

Types of thermal pumps

Household heat pumps are 3 main types, differing in external heat source:

• "Earth" or "soil-water", "soil-air";
• "Water" or "water-water", "water-air";
• "Air" or "air-water", "air-air".

"Earth" thermal pumps

The most popular are thermal pumps that use the heat of the Earth. There was a question above them. These are the most effective, but the most expensive of all types. Pipes leaving underground can be vertically or horizontally. Depending on this, "earthy" heat pumps are divided into vertical and horizontal.

Vertical thermal pumps Supports of pipes for which the refrigerant circulates to a significant depth: 50-200 m. True, there is an alternative - to make not one such a well, but several, but more "small". The distance between such wellbones should be at least 10 m. To calculate the depth of drilling, you can roughly estimate that a thermal pump with a capacity of 10 kW will require a well (one or more) total depth of about 170 m. It should also be remembered that it is useless to be very small - less 50 m - wells.

For horizontal laying expensive drilling for greater depth is not required. The depth of the junction of pipelines in this method is about 1 m, depending on the installation region, this value can be as decreased and increase. In this method, the pipe with the refrigerant is stacked so that the distance between neighboring sites was at least one and a half meters, otherwise the heat collection is not effective.

Host on a note

"If you live in a moderate climate zone - for example, in the North-West, the most effective option for you is a heat pump that uses the heat of the Earth. Moreover, it is better to install the vertical version of the heat pump - especially if your home is on rocky rocks. "

For the installation of a thermal pump with a capacity of 10 kW, the total length of the burned pipe is required. If you take into account the limitations associated with the neighborhood of different sections between yourself, then you will need a plot of land with dimensions of 20 by 20 meters. Is there such a free plot in stock - a big question.

How to choose the desired heat pump

If you live in a moderate climate zone - for example, in the North-West, the most effective option for you is a heat pump using heat of the Earth. Moreover, it is better to install a vertical version of the heat pump - especially if your home is on rocky rocks, where to find a free extensive area of \u200b\u200bland is problematic. But this type of thermal pump is the most expensive in the amount of capital costs.

In the zone with a mild climate - for example, in Sochi - you can install the air-water thermal pump, which does not require excessive capital costs and is particularly effective in the area, where seasonal temperature fluctuations are relatively small.

Depending on the principle of operation, there are also. More popular models operating from electricity.

Another important remark. A good idea is the combined models of thermal pumps, which combine the classic version of the heat pump with a gas or electric heater. Such heaters can be used in adverse weather conditions when the efficiency of the heat pump decreases. As already mentioned, a particularly reduced efficiency is characteristic of air-water thermal pumps and air-air.

The combination of these two heat sources makes it possible to reduce the cost of capital costs and increase the payback period of the heat pumping unit.

Advantages and disadvantages of thermal pumps

The main advantage of thermal pumps are their low operating costs. Those. The cost of produced heat or cooling for the end user is the lowest compared to other methods of heating / air conditioning. In addition, the thermal pump system is almost safe for the home. Consequently, the requirements for ventilation systems of its premises are simplified and the level of fire safety increases. What also has a positive effect on the cost of installing these systems.

Thermal pumps are easy to use and are very reliable, and also - almost silent.

Another plus - you can easily switch the heat pump with cooling heating if necessary. It is only necessary to have at home not only heating, but also fanocyals.

But they have and cons, the main of which is the revolving side of the main advantage - the capital costs of their installation are very significant. Another disadvantage of heat pumps until recently was a relatively low coolant temperature - no more than 60 C. But the latest developments allowed the opportunity to eliminate this disadvantage. True, the price of such models is higher than the standard.

Burning classic fuel (gas, firewood, peat) is one of the ancient ways to produce heat. However, the depletion of traditional energy sources prompted a person to look for more complex, but no less effective alternative options. One of the invention of the thermal pump, whose work is based on the school laws of physics.

Work of the heat pump

A very complex at first glance, the principle of operation of heat pumps is based on several ordinary laws of thermodynamics and properties of liquids and gases:

1. When gas goes into liquid state (condensation), heat is highlighted
2. When the fluid goes into gas (evaporation), the heat is absorbed

Most liquids can boil with sufficiently high temperatures close to 100 degrees. But there are substances and with sufficiently low boiling temperatures. Freon has about 3-4 degrees. Turning into gas, it is easily compressed and the temperature begins inside the tank.

Theoretically, freon can be compressed before obtaining any desired temperatures, but in practice 80-90 degrees are limited to the full operation of the classical heating system.

Everyone faces the thermal pump not once a day when it passes by the refrigerator. However, it works in the opposite direction, taking the heat of the products and dissipating into the atmosphere.

Video about work technology

Scheme of thermal pump

The performance of most heat pumps is based on the heat of the soil in which the temperature has practically not fluctuated during the year (within 7-10 degrees). Heat moves between three contours:

1. Contour of heating
2. Heat pump
3. Rolling (Oh Earth) Contour

The classic principle of operation of thermal pumps in the heating system consists of the following elements:

1. Heat exchanger, giving an internal contour heat taken from the ground
2. Compressive device
3. The second heat exchange device transmitting the heating system the energy obtained in the internal circuit
4. Mechanism reduced pressure in the system (choke)
5. Raspical contour
6. Earthy probe
7. Heating contour

The pipe that performs the role of the primary circuit, is placed in the well or buried directly into the ground. It moves the non-freezing liquid coolant, the temperature of which increases to the similar characteristic of the Earth (about +8 degrees) and enters the second circuit.

The secondary circuit takes the heat from the liquid. The circulating inside freon begins to pour and transform into the gas that is sent to the compressor. The piston compresses it to 24-28 atm, due to which the temperature increases to + 70-80 degrees.

At this work step, the energy concentration into one small clutch occurs. This increases the temperature.

Preheated gas enters the third contour, which is represented by hot water systems or even home heating. When transmitting heat is possible losses up to 10-15 degrees, but they are not significant.

When Freon cools, pressure decreases, and it turns into a liquid state. At a temperature of 2-3 degrees, it enters back in the second circuit. The cycle is repeated again and again.

Main species

The principle of operation of thermal pumps is arranged so that they are easily exploited without interruptions in a wide range of temperatures - from -30 to +40 degrees. The following two types of models were most popular:

• Absorption type
• Compression type

The absorption type of the model has a rather complicated device. They transmit the resulting thermal energy directly with the help of the source. Their operation significantly reduces the material costs of consumable electricity and fuel. Compression type of model for heat transfer consume energy (mechanical and electrical).

Depending on the thermal source used, the pumps are divided into the following types:

1. Processing secondary heat - the most expensive models that have gained popularity for heating objects in industry, in which the secondary heat generated by other sources is consumed to nowhere
2. Air - taking heat from the ambient air
3. Geothermal - choose heat from water or land

By type of entrance / weekend, all models can be classified as follows - soil, water, air and their various combinations.

Geothermal thermal pumps

Geothermal pumps are popular, which are divided into two types: closed or open type.

Simple device open Systems Allows heating the water passing inside, which later enters the ground. Ideally, it works in the presence of an unlimited volume of pure liquid coolant, which after consumption does not harm the environment.

Closed systems of geothermal heat pumps are divided into the following varieties:

• Water - located in the reservoir on an indiscriminate depth
• With a vertical location - the collector is placed in a well to a depth of 200 m and applied locally with uneven landscape
• With a horizontal arrangement - the collector is placed in the ground to a depth of 0.5-1 m, it is very important to ensure a large contour on a limited area

Air-water type pump

One of the most universal options is the air-water model. In warm periods of the year, it is very effective, but in winter, performance can be significantly falling.

The advantage of the system is simple installation. Suitable equipment can be mounted in any convenient location, for example, on the roof. Heat, which in the form of gas or smoke is removed from the room, can be reused.

Water-water type

The heat pump "Water-water" is one of the most efficient. But its use can be limited by the presence of a vicinity of a reservoir or insufficient depth, which in the winter period does not observe a significant temperature drop.

Low potential energy can be selected from the following sources:

• Soil water
• Open reservoirs
• Sewage industrial waters

The most simple principle of the operation of heat pumps in models that select heat in the reservoir. If it is decided to use groundwater, drilling a well may be required.

Type of soil-water

Heat from the soil can be obtained throughout the year, since at depths from 1 m, the temperature is practically not changed. The heat carrier uses the "brine" - non-freezing fluid that circulates.

One of the shortcomings of the Soil-Water system is the need for a large area to achieve the desired efficiency. Level it is trying to lay pipes with rings.

The collector can be placed in vertical positionBut it will take a well depth to 150 m. At the bottom mounted umbrellas, selecting heat soil.

Pros and cons of heating systems with a thermal pump

Thermal pumps were widely used in the heating systems of a private residential area or industrial space. They gradually displacing more classic energy sources due to reliability and efficiency.

Among the numerous advantages that provide the operation of the heat pump, allocate:

• Saving material funds on maintenance Systems and heat carrier
• Pumps work completely offline
• In the environment, harmful burning products and other toxic substances are not distinguished
• Fireproof equipment mounted
• Ability to easily reversal system operation

Despite the mass of advantages, it is necessary to take into account the negative aspects of the operation of the heat pump:

• Great initial investments on the arrangement of the heating system - from 3 to 10 thousand dollars
• In cold periods, when the temperature is released below -15 degrees, you need to think about alternative heating options.
• Heating based on the operation of the heat pump is most efficient only in low-temperature coolant systems

Another schematic video:

Let's sum up

Having learned and mastered the principle of operation of the heat pump, you might think and decide on the feasibility of its installation and use. The initial costs that may seem very large-scale will soon take off and begin to bring peculiar profits in the form of savings on classic fuel.

• Principle of operation of thermal pumps
• Heating contour
• Advantages and disadvantages of heat pumps
• Selfiellic secrets

How it works

The thermal or geothermal pump collects thermal energy from the environment, converts it using refrigerant, and serves in the home system of heating.

The main assemblies of the unit: compressor, heat exchanger, circulation pump, automation, feeding out. The pump is capable of picking heat out of three sources.

• Air.
• Water.
• Priming.

Judging by the branches of discussions, we are in demand. We have two options - water and soil. This is due to temperature limitations - the source must be a plus. The location of the feeding circuit is horizontal or vertical. In the first case, the highway is laid below the level of the freezing - from 1.5 meters of depth. Or on the bottom of the reservoir, there even for severe frosts - to + 4 ° C. The length of the circuit depends on the dimensions of the heated room and the power of the pump. In the second, the wells are dried under probes, the middle depth is 50-70 meters. Piasters A B., one of the forum and the owner of the heat pump, so described the vertical system.

PIASSERS A FORTERMHOUSE

Heat gather geothermal probes - a slid-mediated pipeline for which ethylene glycol circulates. They fall into the well 50-70 meters of depth. This is an outer contour, and the number of wells depends on the power of the heat pump. For a house of 100 meters, quadrature will require two proth - two wells.

Heating contour

The heat pump, in contrast to boilers on gas, coal or electricity, heats the medium carrier to 40⁰c. This is the optimal temperature at which the equipment is minimal and consuming electricity. For ordinary radiators such indicators are not enough. Therefore, no pipes and batteries are usually used with the heat pump, but a warm floor. With this heating of the coolant more efficiently. Only the step between the pipes should be less. It is worth considering that the warm floor creates restrictions on the choice of furniture and dries air. Additional moisturizing will be required. In summer, the floors can work on cooling.

Advantages and disadvantages

The main advantage of the thermal pump is a high return, for each kilowatt of consumed electricity, it gives about 5 kW of heat. Plus, no physical effort in the process of work, no waste and carbon monoxide gases.

In addition, there is no dependence on gas supplies and harassment by instances for coordination. Yes, and requirements for boiler house are not such strict. After starting the cost of operation minimum. Only electricity is paid, the average power pump consumes about 4 kW per hour. Modern models Pulse, do not work continuously, but are included if necessary. This reduces the number of working hours per season and energy costs.

The main disadvantage of geothermal heating is the issue price, even a Chinese or domestic aggregate, not to mention European brands worth several thousand euros. Together with the arrangement of the external contour and installation, the pleasure will be poured hundreds of thousands of rubles. According to the calculations of experts and owners, the pump pays off for several years. It works on the Darm source, compared with the cost of tons of coal or a cube of firewood, saving considerable. But not everyone has extra half a million on equipment and commissioning.

If not far from the plot of water, it turns out considerably cheaper, there are spending on expensive drilling.

The active wells also optimize the process, becoming a source of heat. This is confirmed by memberschanin children Maros From Ust-Kamenogorsk. It works in an enterprise producing heat pumps and providing services for their installation. Therefore, it is thoroughly disassembled in the situation and the question of the branch participant, whether the probes are needed if there are wells on the site, replied exhaustively.

children Maos Member FORUMHOUSE

Why do you need to bother with probes if the water is enough. You will chase from one well to another through TN. With probes underway, when there is no water or a pole on the site, the need does not cover. For a 10 kW power pump, a volume of 3 cubes is needed.

Selfiellic secrets

But the biggest savings turns out when the heat pump is collected with their own hands. The leading node is a compressor, take away from powerful air conditioners and split systems, the technical parameters of them are similar. Heat exchangers are sold ready-made, but some craftsmen and they manage to solder copper pipes. As a refrigerant - Freon, it is also sold in cylinders. Controllers, relays, stabilizers, all items separately will cost half a cheaper than in the finished set.

Most often, homemade is organized above the ponds or when there is already a valid well. Due to the fact that the lion's share of expenses are for earthworks, and the maximum savings on them.

Skillian aparat2., from Riga, gathered geothermal himself and posted a photo report about it, with detailed description All operations.

aparat2 Member Forumhouse

Collected TN from two single-phase compressors of 24,000 BTU (7 square meters. On cold). It turned out a cascade, a thermal capacity of 16-18 kilowatts, at a consumption of electricity about 4.5 kW per hour. Selected two compressors so that there are currents less, I will not run at the same time. In the meantime, only the second floor lies and a single compressor is enough. Yes, and, experimenting on one, then an improved second design.

Also, the forumchanin decided not to spend money on the finished heat exchangers of a plate-type. They are demanding of water treatment, and there are weights. The homemade exchanger he combined with the battery to increase returns. It turned out a work unit at times cheaper purchased.

However, thermal pumps are an alternative when there is no gas and large heating areas. Even with self-assembly system, the costs of composite components are solid. You can get closer to the topic on a branch of software, there is a mass useful SovietsThe forum users share their experience, discuss various models. It will help to deal with the assembly. And the options for heating a large house without gas in the roller - a visual example. For owners of wooden houses - video