Cool PV

PV-hybrid modules and heat pumps system combination with ground collectors designed to increase both systems‘ energy efficiency

The project examined possibilities to increase the efficiency of combined systems comprising hybrid collectors and heat pump installations. Since the electricity yield of PV-modules increases when the cell temperature decreases the hybrid collectors of PV modules are cooled using heat pumps. Due to the low temperature range this waste heat cannot be used for warm water treatment is. Thus, new usage scenarios have been analyzed for heat pump systems.

For example, tests were carried out that aimed at increasing the heat pumps’ condensation temperature with waste heat in an effort to increase its year-work-unit. Special attention was paid to the active use of ground collectors as heat storage units for the load distribution between waste heat availability and demand. Various control-oriented and hydraulic concepts were developed; their overall energy efficiency was verified through dynamic facility and building simulations. 




Fig. 1: Temperature profile of the 3D CFD (left) and the 1D CFD ground model (right) after the winter period (06 March)


Fig. 2: Overall system diagram
Fig. 3: Results with implemented PVT-collector - Scaled ordinates focusing on thermal portion of the variants

Duration: 04/2014 - 03/2016

Funding agency, research & cooperation partners

Funding agency

Research partners

Project team and project manager

Project manager

  • Christian Heschl
    Prof.(FH) DI(FH) Dr. Christian Heschl
    Dept. Energy & Environment
    Campus Pinkafeld

    Schwerpunkte in Forschung und Lehre:
    Gebäudetechnik, Sorptionstechnik, Thermodynamik, Wärme- und Stofftransport, Computational Fluid Dynamics (CFD)

Project team

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