Heat pump with own hands - the advantages of heating from natural heat

In nature, heat is everywhere. Heat is in the ground, water, air, but it is diffuse and low-potential. For example, the soil temperature in winter is about zero. And the necessary temperature for a comfortable stay in the house is twenty-three to twenty-seven degrees. Heat pump and is designed to raise the temperature for heating the room to the required. The heat pump for heating the house runs on electricity. If the house is heated with an electric boiler, then 1 kW of heat is generated per 1 kW of electricity expended. In a house where heating is a heat pump, up to 5 kW of thermal energy will be received per 1 kW of spent electrical energy. It will be more expensive than heating from natural gas, but much cheaper than direct heating by electricity.

If we talk about the differences between heating the house with a solid fuel boiler and using a heat pump, then again the conclusions will be in favor of the second option. You need to constantly monitor the wood boiler. In addition, open fire and a very hot chimney always represent a danger of fire. With a heat pump all this can be forgotten. There is no fire at all.

Principle of operation

There are three types of these systems. The first is air-to-water, the second is water-to-water, and the third is ground-water. The first word means the environment from which heat is taken. And the second is the heating medium of the heating system. For Russian conditions, in particular, for the Moscow region, the most convenient option would be "soil-water". The purchased system with a heat pump is comparable in price to the purchase of a small car. It is very tempting and difficult task to make a heat pump by oneself.

Homemade device

Among folk craftsmen there are those who made a heat pump with their own hands and coped with this rather complicated work. The proposed device operates on a water-to-water basis. Two wells are digging at a distance of 20 m from the house. From one water will be pumped into the system, in the other - to merge. The distance between the wells should also be about 20 m. From the well, water enters the evaporator heat exchanger, and afterwards through the pipes runs into the drain well. Heat exchangers are produced on the principle of "pipe-to-pipe".

The condenser is made of copper and metal-plastic pipes, total length 12 m. The evaporator is made of plastic pipe. Heat-exchangers are insulated in the form of a foam pipe. The outlets of copper pipes are also sealed with a special sealant that withstands high temperatures. Such a heat exchanger is not afraid of low temperatures and water of poor quality. A purchased compressor is installed on the welded frame.

Further it is better to invite a refrigeration specialist to perform welding of copper tubes and fill the system with freon. Yes, and pick up the amount of Freon can only be a specialist, but much depends on this. It also regulates the operation of the compressor, since it can withstand a temperature of no more than 90 ° C. Then the entire plant is connected to the heating and cooling circuits, and, in fact, the heat pump is ready for operation. You can equip it with digital thermometers for water, a water meter.

In the well is good to install a float switch, the system can be built-in protection against freezing, for the compressor can be set to manual inclusion, because it can not immediately after a sudden shutdown immediately turn it back on. Such a heat pump, made by his own hands, works for the author of the article in his own house.