RO126435A0 - Mixed water-air heat pump - Google Patents

Abstract

The invention relates to a mixed water-air heat pump meant to heat dwellings or commercial spaces. According to the invention, the pump acts as a geothermal heating system which comprises a water well (5) wherein a submersible pump (4) is introduced, said pump pumping the water from the water bearing bed through a pipe (6) towards a water-air heat exchanger (1) located between two external inverter type air-conditioning units (2 and 3), the colder water coming out of the heat exchanger (1) being returned through a pipe (7) to a second well (8), returning to the water bearing bed, and the heat in the water relatively warmer than the atmospheric air in the heat exchanger (1) is transmitted towards the air handled by the fan thereof towards the rear side of the external inverter-type air-conditioning units (2 and 3), between the dwelling wall and the air inlet in the external units (2 and 3), the relatively heated air coming out of the heat exchanger (1) being taken over by the external air-conditioning unit (2 and 3), heating the cooling agent circulating normally and which is compressed towards the internal air-conditioning unit which is inside the dwelling, heating the air thereof, and depending on the atmospheric air temperature, the submersible pump (4) and the fan of the heat exchanger (1) can be started or not, these being able to start a thermostat, if the atmospheric air temperature were lower and the performance coefficient of the inverter units were smaller, thus by relatively heating the air upon inletting the external units (2 and 3), these will function with an improved performance coefficient.

Description

DESCRIPTION

The invention relates to a geothermal heating system for heating homes or commercial spaces.

The system behaves like a water-air or air-to-air type heat pump, extracting heat from the ground or from the air and transferring it to the air inside the home. The operating principle of heat pump systems is well known, consisting of a closed circuit containing a vaporizer (external unit), a compressor, a condenser (internal unit) and an expansion valve. In the circuit described above freon or any frogorific agent with low boiling temperature circulates. In the vaporizer (external unit) the thermal transfer between the cold source and the refrigerant takes place, while in the condenser (internal unit) the thermal transfer from the refrigerant takes place to the internal heating environment.

There are known different types of heating systems based on the heat pump. This can be air - air, air - water or water - water type. All these systems are characterized by the coefficient of performance COP, equal to the ratio between the heat produced and the energy consumed. COP is highly dependent on the temperature of the cold source. The higher this temperature, the better the COP.

The air-to-air pump is any type of air conditioner equipped with the heating function. This type of construction easy to install, simple and cheap has the disadvantage of decreasing the coefficient of performance during the period characterized by ambient temperatures below zero degrees Celsius. In addition, low ambient temperature operation of the outdoor unit leads to frost (frost) of the outdoor unit, continuous operation being impossible at temperatures less than IOC.

There is also known a heating system equipped with a very efficient water-type heat pump, characterized by a very good performance coefficient generated practically by the relatively high temperature of the water heated by the soil and by the good heat transfer coefficients from the liquid environment. (water) to the vaporizer, respectively from the frogorific agent in the internal unit to the water of the heating circuit of the house. The external heat source of this system is represented by the water extracting heat either from an open system (supply well - heat pump - well discharge) or from a closed system, represented by return pipe assemblies buried underground in the ground vertically. have it on the horizontal. However, this system is very expensive, requiring external pipe field work or two large capacity wells, the heat pump itself being very expensive and the internal heating system of the home requiring the classic network of radiators or radiators. ..

The geothermal heating system according to the invention removes the shortcomings of the solutions known by the fact that it consists of a combination of an inverter air conditioning system and a simple source of geothermal heat, the connection of which is made by a simple heater (radiator changer heat) type air water. The outdoor air conditioning units are mounted in the atmospheric free air and have a heat exchanger (heater-radiator) water-air. The primary heat source is made up of a well that contains the open circuit water formed by a submersible pump, the flow pipe that leads the water to c \ - 2 O 1 1 - 0 OO 5 9 - 3 1-01-2011 the water exchanger air and the return pipe that carries relatively cooler water from the heater to the second well. The heat is obtained from the groundwater which acts as an inexhaustible source of energy. The water is extracted through the submersible pump and transported to the heat exchanger radiator. This exchanger blows air relatively warmer than atmospheric air, between the wall of the house and the back (air intake) of the outdoor unit of the inverter type air conditioner. the air conditioner operates at a coefficient of good performance, significantly higher compared to the coefficient of performance characteristic of ambient air temperature, in case it was not heated by the radiator ... So the heat passes from the water from the heater to the air between the wall and the outdoor unit of the inverter type air conditioner. Further, the air conditioner works normally by transferring heat from the refrigerant to the air inside the home.

The invention, eliminates the shortcomings of known, closed or open geothermal systems. Compared to a closed system characterized by return systems of pipelines, developed horizontally or vertically, there is a definite advantage of the cost and volume of labor required to set up very small, provided the same technical performance is achieved. .. In this sense, the surface of the heat transfer from the ground to the water is given by the importance of the groundwater. Even though it is an open system, the water taken from the groundwater has no special purity, however there are no problems of contamination of the water. heat exchangers, the system works relatively little during the winter, only when the atmospheric air temperatures drop below minus 10 C. In addition, a radiator type heat exchanger is very robust and does not pose particular reliability problems, precisely because of its simplicity. . .This system practically extends the operating temperature range of inverter type air conditioners.

In case the ambient temperature drops to extreme values, the functioning of the described system can be improved by attaching an expanded polystyrene enclosure applied as a bell basin above the system, having as its basis the wall of the dwelling on which the outdoor units are applied. conditioned. In this way, inside the enclosure a different air and thermally insulated from the atmospheric one would have been transported. This air is further heated by the heat exchanger and transferred to the outdoor air conditioning units. They cool the air, taking heat from it but it is still taken over by the exchanger and reheated. Thus a closed circuit appears, the operating temperature of the external air conditioners being considerably increased and their coefficient of performance, considerably improved.

An example of embodiment of the invention is given in connection with FIGS. 1-2, which represents:

Fig. 1 section of the heating system according to the invention - operating mode using the geothermal heat source fig. 2. section of the heating system according to the invention - operating mode using the geothermal heat source, but with the application of the bell-type enclosure, in the case of extremely low ambient temperatures.

The geothermal heating system, according to an embodiment of the invention, consists of the external air conditioning units (2) and (3) and the heat exchanger (1). The heat exchanger (1) is in a water circuit formed by the submersible pump (4) located in the first well (5), the flow pipe (6) and the return pipe (7) which goes down in the second put (8). . The water circulates in the circuit being taken over by the submersible pump (4) from the wells (5), passed through

<Λ - 2 ο ν - Ο Ο Ο 5 9 - 3 1 -Οΐ- 2911 the heat exchanger (1) from which it cools through the return pipe (7) being the turn of the well (8).

The air flows from the heat exchanger (1), blown by its fan, to the external air conditioning units (2) and (3). The atmospheric air is heated relatively by the heat exchanger (1) and brought to a higher temperature at the entrance to the outdoor unit (2) and (3), leading to the operation of the air conditioner at a good COP.

In the case of open air circuit operation (fig. 1), 1a reasonable atmospheric air temperatures (up to minus IOC), the submersible pump (4) and the fan of the exchanger (1) can be switched off, the performance coefficient being quite good When lowering the air temperature below 10 C can start the pump (4) and the heat exchanger fan (1)

In case of the use of the bell-type enclosure (9) (fig. 2), the air flows from the heat exchanger (1) to the back of the air conditioners between the wall and the appliances, is taken over by the appliances (2) and (3) and is delivered relatively cooler to the fan of the heat exchanger (1) which takes it and pushes it heated by the radiator to the outdoor units (2) and (3), the cycle resuming.

Claims (2)

claims 1) Geothermal heating system characterized by a heat exchanger - air-water radiator (1) sandwiched between two external air-conditioning units (2), the exchanger (1), through which the water from the groundwater flows, rising the temperature of the air entering the outdoor air units, type inverter (2) and (3). 2) Geothermal heating system according to claim 1, over which a bell-type enclosure (9) is applied to the air in the enclosure, thermally insulated from the atmospheric air, being conveyed in a closed circuit.