Definition of a heat pump

A heat pump or PAC is a thermodynamic device that takes heat from one medium (e.g. air, water, earth) to transfer it to another (e.g. in a home to heat it). The refrigerator is the best known heat pump system. A reversible heat pump will produce coolness in summer and heat in winter.

There are 3 main types of heat pumps:

  • Air-to-air heat pump: the heat is taken from the air and transferred directly to the air in the room to be heated or cooled.
  • Air/water heat pump: the heat is taken from the air and transferred to a water circuit that will supply a floor and/or ceiling heating and/or cooling, fan coil radiators or aerothermal heaters.
  • Water/water heat pump: the system takes heat from a water circuit in contact with an element that will supply it with heat (earth, groundwater) and transfers it to another water circuit

Principle of an extract air heat pump

Inside the MyDATEC thermodynamic unit, the first air flow (Extraction -> External discharge) passes through an exchanger battery “evaporator “. The air flow transfers the heat contained in the air to the heat transfer fluid of the thermodynamic cycle. The air flow of a temperature of approximately 20°C at the extraction is rejected, after having given up its calories, towards the outside at a temperature of approximately 2°C.

At the same time, the second air flow (Fresh air outside -> Insufflation in the dwelling) crosses a second exchanger battery ” Condenser “. The air flow recovers the heat from the heat transfer fluid of the thermodynamic cycle. The temperature increase between the new air, taken from outside the dwelling, and the air blown into the dwelling is about 35°C. This means that for an outside air temperature of 0°C, the insufflation in the dwelling is about 35°C.

  • The two air flows are very distinct and there is no mixing between the two air flows, which ensures the perfect renewal of the fresh air in the dwelling.
  • The use of a heat pump system, with a thermodynamic cycle, allows, contrary to the static double flow system (with static exchanger) to heat the incoming air to a temperature higher than the temperature of the extracted air (20°C) of the dwelling allowing to ensure according to the losses of the dwelling all or part of the heating need.

The difference between MyDATEC and other PACs

Unlike other systems, MyDATEC uses the air extracted from the home for ventilation purposes. This source of energy is renewable, since if it were not reused, it would be lost, and above all, this source is naturally warm (about 20°C all year round) and rich in humidity ! Everything a heat pump likes ! That’s why MyDATEC’s efficiencies are so spectacular. On the other hand, the source used by MyDATEC, the air extracted from the CMV, is limited Heat recovery from extracted air is no longer of interest if there is no need to ventilate ! That’s why the power provided by MyDATEC is limited (up to 3 kW for the PAC) while a PAC air air could provide unlimited power.

[button link=””]Principle of a VMC [/button]