Design and Monitoring of a Solar Thermal, PV and Heat Pump System
Abstract
Two new, residential, and high-performance buildings were constructed in Innsbruck, Austria (with cold winters and mild summers) aiming to achieve net-zero energy building (NZEB) standard. The design was supported by the Passive House design tool PHPP. A groundwater heat pump, solar thermal collectors, photovoltaic panels (PV), and heat recovery ventilation units were installed. On one building a solar thermal system of 74 m2 and a PV system of 52.5 m2 and in the other building a PV system of 99.8 m2 were installed. Four years of monitoring data are available. In this study, a monthly comparison between the monitoring data and the design values (PHPP) is presented concerning the performance of solar thermal, PV, and the heat pump. In addition, the efficiency of the solar thermal system is compared against the one of PV driven heat pump system, and the direct exploitation of onsite electricity generation is analyzed.