combining a photovoltaic system and a heat pump SIMPLY ENVIRONMENTALLY FRIENDLY HEATING

The global targets for decarbonisation and the reduction of greenhouse gas emissions raise the increasing use of renewable energies. Within these, photovoltaic solar energy is an energy source that produces electricity of renewable origin, obtained directly from solar radiation by a semiconductor device called a photovoltaic cell.

Photovoltaic energy does not emit pollution during its operation, effectively contributing to reduce the emission of greenhouse gases; although it is true that in the global life cycle of photovoltaic panels there may be a certain environmental impact, quickly amortizable.

The use of the inverter compressor allows the variation of the capacity by modulation of the rotational speed of the compressor and the adjustment of the electrical consumption, with elimination of the high starting currents. The electronic expansion valve provides proportional modulation of the refrigerant with high flow accuracy under partial loads and extends the operating range of the equipment. Finally, the use of electronically switched motors (EC) applied to axial fans, plugfan radials and water circulation pumps allows the adaptation of the flows to different conditions and operating strategies reducing the power consumed as well as the starting current of the same.

Thus, the solar inverter sends to the control of the equipment information about the instantaneous electrical power generated by the photovoltaic panels at all times. This control receives and integrates the information of the inverter through a PID algorithm, compares the power generated by the photovoltaic with that consumed by the equipment and orders the inverter’s drive to adapt the capacity of the compressor and adjust the power consumed. Finally, it verifies the adequacy of the photovoltaic power generated and consumed and informs the solar inverter.