No energy turnaround
without a heat turnaround
Create your own energy turnaround!
According to the Federal Environment Agency in Germany, electricity consumption and heating account for 22 percent of our CO2 emissions. Electricity accounts for 7 percent, heating for 15 percent! Heating thus pollutes our environment twice as much as electricity consumption.
The solar energy yield of our PRISMA® PVT collectors takes this into account. The thermal efficiency (53%) of the collector is more than twice as high as the PV efficiency (20%). At the same time, the module even produces 5-10 percent more electrical energy on an annual average than standard photovoltaic collectors due to the cooling of the PV cells by means of the highly efficient copper absorber installed on the back. The waste heat generated by the cooling can be ideally used for heating support. The maximized solar yield of the PRISMA® PVT thus sustainably reduces your energy costs. At the same time, you support the reduction of CO2 emissions by avoiding the combustion of fossil fuels.
Conventional PV modules
Ø Annual yield of usable electricity: 6,704 kWh
Ø Annual yield of usable heat: o kWh
With respect to: 16 PV modules at the Würzburg site.
Your roof can do more! Electricity and heat from one source means maximum energy harvest from a limited area.
The roof area that can be used to install your home power plant is limited. Skylights, shaded areas due to chimneys, surrounding buildings or trees further limit this area. The energy demand for power and heat of your building can only be achieved by optimal energetic use of the usable roof area. The aesthetic appearance of your building will not be affected even if PRISMA® PVT and pure PV modules of the same design are installed together. Everything appears as if it were cast from a single mold.
Prisma® PVT Modules
Ø Annual yield of usable electricity: 7,040 kWh
Ø Annual yield of usable heat: 12,256 kWh
With respect to: 16 PRISMA® PVT collectors at the Würzburg site.
5% additional electricity yield due to rear cooling.
Annual thermal and electrical output of the PRISMA® PVT 3.0 hybrid collector (cooled) at the reference site in Würzburg.
| Number of collectors | Annual thermal yield | Annual electrical yield |
|---|---|---|
| 1 | 766 kWh | 440 kWh |
| 6 | 4,596 kWh | 2,640 kWh |
| 8 | 6,128 kWh | 3,520 kWh |
| 10 | 7,660 kWh | 4,400 kWh |
| 14 | 10,724 kWh | 6,160 kWh |
| 16 | 12,256 kWh | 7,040 kWh |
| 20 | 15,320 kWh | 8,800 kWh |
Bivalent operation of a brine heat pump with PRISMA® PVT 3.0 and geothermal baskets as primary energy source.
Geothermal probe drillings are not possible at every location due to water law or geological constraints. Air-source heat pumps are often problematic in densely built-up areas due to noise emissions. The large area required by geothermal surface collectors is not available for every property.
Geothermal baskets can be used as an alternative at lower cost and with high efficiency if the area required is small. These are installed below the frost line with a cover layer of 1.30-1.50 meters. This can also be done under a driveway with grass stones. In addition, the brine heated by the PVT modules is used as source energy for the heat pump throughout the year. This is stored in the small primary energy storage tank via a heat exchanger. As long as the PVT system supplies heat energy above 0° C, the primary energy circuit of the HP runs via this storage tank. If the temperature drops below 0° C, the system switches to the geothermal baskets.
The heat pump then raises the temperature level to the desired flow temperature and then loads the larger secondary storage tank. The X45/90 WP fresh water station heats the domestic water as required. In summer, excess energy from the solar thermal system is dissipated into the surrounding soil via the geothermal baskets, resulting in a significant increase in the source tem-perature of the geothermal baskets in fall and early winter. The electrical power of the photovoltaics supports the operation of the heat pump, if necessary using a solar battery.
Due to this special system configuration, the heat pumps usually achieve higher annual performance factors than using geothermal probe boreholes of usual drilling depths as the sole primary energy source, if the components are designed correctly. Due to the high regenerative share with correspondingly high CO2 reduction, BAFA promotes this innovative heating system. More information here.
Plant concepts A and B, each eligible for BAFA funding
System concept A: with primary and secondary storage, PVT Heat energy transfer to the source side of the heat pump via primary brine storage.
Plant concept B: with one buffer storage and PVT heat energy transfer to the source side of the HP via external heat exchangers.
Solar domestic hot water heating and heating support in existing buildings using gas condensing boilers, biomass boilers or heat pumps.
PRISMA® PVT supports the production of your hot water requirements. From March to October, your burner is considerably relieved by the solar thermal energy of the Prisma PVT 3.0. The duty cycle of your burner is significantly reduced and the switch-on intervals are extended. The less efficient operation during the heating-up phases of the burners is thus reduced proportionally to the total burning time of the boiler. As a result, fuel consumption is significantly reduced. You save hard cash.
Alternatively, if you are thinking about installing a PV system in an existing building, you can score twice with a PRISMA® PVT system for the same amount of space on the roof. In addition to electricity, a significantly high proportion of your demand for thermal energy from the sun is supplied to you free of charge. The installation costs of the PVT system are not significantly higher than for a pure PV system.
System components
For the above system concepts, we recommend the following main components from our extensive product range.
TWL
Buffer tank
PR-300 / -500
If the heat pump is supplied monovalently or bivalently with ground baskets via your PVT system, this buffer storage tank with a heat exchanger serves as the primary energy source. The heat pump pumps the thermal energy supplied by the PVT system in the low-temperature range and stored in this primary storage tank to a higher temperature level and then stores it in the secondary storage tank.
TWL
Hygiene combi tank
KER-500 / -800 / -1000
The TWL KER hygienic combination storage tanks are used if your heating system works together with a conventional burner technology. The lower heat exchanger then extracts the absorbed heat from the solar thermal of the PVT system and releases it into the storage tank. Your boiler then raises the temperature to the desired level. There it is then available for the heating circuit or for domestic hot water heating. The corrugated stainless steel heat exchanger installed at the top is supplied by the domestic water connection and heats your hot water. Due to the small volume of 29 liters in the corrugated stainless steel pipe, perfectly hygienic hot water is always available to you.
Oventrop solar station
Regusol LH 15
+ controller Deltasol MX
The Regusol LH15 is responsible for the circulation of the solar fluid in the PVT collector array. The flow rate can be precisely adjusted to the system hydraulics and the weather conditions. The permanent venting keeps the system free of air and thus ensures trouble-free operation of the circulation pump. The DeltaSol MX temperature difference controller regulates the circulation pump with regard to the optimum speed and balances the temperatures in the collector field with the storage tank temperature. This ensures the maximum solar yield of your PVT collector array.
Oventrop
Fresh water station
Regumaq X45 WP / X80
The Regumaq fresh water stations are optimized for heat pumps or solar thermal energy sources. A highly efficient stainless steel heat exchanger draws heat extremely effectively from the upper area of the buffer tank and transfers it to your hot water supply. Due to the small volume of the heat exchanger, there is no risk of legionella formation. Optionally, the Regumaq fresh water stations can be equipped with a drinking water circulation set.