Heat Pumps

Heat Pumps

WHAT ARE HEAT PUMPS

Heat Pumps are special machines that allow "eluding" the laws of nature on heat transfer. Contrary to the natural flow, these devices allow to transfer heat from a cold source to a warmer receiver. This occurs using a small amount of electrical energy.

Heat source can be external air (Air Source Heat Pumps - ASHP) or the ground (Ground Source Heat Pumps – GSHP). Obviously the higher and the more stable the temperature of this source is, the more efficient the heat pump. For this reason, Ground Source heat pumps are generally more efficient than air source heat pumps.

WORKING MODES

In winter, heat pumps allow a flow of heat from an external source (that is cold) to the interior of a building (that is warm). In this way the sources becomes even colder, but the receiver warms up. The heat transferred from the heat pump can be used to provide heating or to produce Domestic Hot Water (DHW).

In summer, the excess heat inside the building is transferred to the soil, which is characterized by a lower temperature than the outside air. This optimizing the production of cooling energy for air conditioning and significantly reducing operating costs compared to conventional air conditioning systems.

A heat pump is said MULTIFUNCTION (or reversible) when it allows both winter heating and summer cooling. In addition it can produce DHW throughout the year by using the heat from the air or from the ground.

During the summer cooling, it is also possible to produce DHW using the heat coming from inside the building. The heat is then transferred from where it is not needed (internal environment) to where it is needed (DHW) greatly limiting the production costs and ensuring COP (Coefficient Of Performance) superior to 5.5. This type of operation is said POLYVALENT.

COMPRESSOR TYPES

The compressor is the heart of the heat pump, is this is the component that regulates the heat transfer. Both the operation modes can be further advantaged by the use of modulating inverter driven compressors. This type of compressor has the ability to adapt its capacity output based on the user demand.

The modulating heat pumps have a compressor equipped with an inverter that sends a signal to the BLDC (Brushless Direct Current) motor, with the best technology currently available on the market, and allowing the variation of the number of revolutions.

With this solution, the heat pump is able to perfectly follow the energy demand of the building, providing adequate power output at all times and thus ensuring a lower electrical consumption in the long term if compared to the On-Off compressor.

The inverter technology is today the best technology for residential systems.

Eneren can provide heat pumps that are MULTIFUNCTION or POLYVALENT, in both cases ON-OFF or MODULATING.

DOMESTIC HOT WATER

In Eneren’s heat pumps, the production of sanitary hot water takes place solely through the thermodynamic cycle of the heat pump, without the use of auxiliary electric resistances. With a polyvalent configuration, during the summer period the heat removed from the air-conditioning can be recovered and used for the production of DHW; during the winter period, or always with a multifunction configuration, the energy is instead withdrawn from the ground or from the air. This solution allows to obtain at any moment the amount of water necessary for the daily requirement. Thanks to the high energy performance of the geothermal heat pump system, it is possible to significantly reduce fuel consumption, so that, even in a residential environment, this solution is proposed as a cost-effective alternative to traditional boiler or gas tank. The geothermal system can also be integrated with solar thermal and photovoltaic systems, making it possible to achieve substantial energy independent building. Research and development, professionalism and experience, result in a wide range of solutions to the efficiency of the system and minimize the installation and management costs.

 

 

 

 

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