Description: Das Projekt "PV system combined with domestic heating - Pappeneckerhof" wird vom Umweltbundesamt gefördert und von Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V., Zentralverwaltung durchgeführt. Objective: Power supplies for remote houses without grid connection (10000 in Germany, guessed 300000 in Europe) represent a very attractive market for photovoltaics. Up to now, the only available option was the installation of a Diesel generator with a high pollution level and a discontinuous power supply. Environmentally acceptable photovoltaic AC systems can now be constructed, using a special inverter recently developed at the Fraunhofer Institute for Solar Energy Systems (ISE). The quality of the alternating current is identical to that supplied by public utilities. The high efficiency value of the inverter, which is maintained even for very low partial loads, allows the inverter to operate continuously without reducing the system efficiency. General Information: After an original design for a farmhouse near Stuttgart the project was finally realised in the Black Forest at the Rappenecker Hof, a restaurant and mountain hut. The original concept of a combined PV and DHPP system was abandoned. In 1990 a 1 kWp wind generator was added. A 3.8 kWp array, integrated into the roof supplies the farm's electricity needs. An existing diesel generator is used as a back-up energy source. 98 modules of type AEG PQ 10/40/01 are directly mounted on to the roof structure on the south facing side of the building at a tilt angle of 53 degree C. The array charges a battery bank with a total storage capacity of 24 kWh. The battery bank is divided into 5 groups, each with a different voltage level (12, 24, 42, 84, 162 V) needed by the inverter. Each battery group is charged by a dedicated string of pv modules via a charge controller and blocking diode. Power at 220 V ac is fed to the house from the battery via a 3 kW inverter developed by the Fraunhofer Institute. The inverter has a high efficiency, which is above 90 per cent even when the output power is at 10 per cent of its nominal value. When the batteries are approaching deep discharge, a back-up diesel generator of 16 kW can be used to meet the load and simultaneously recharge the batteries. The installation has been monitored for two years in accordance with the JRC Ispra monitoring guidelines. The monitoring system consists of a HP 86 Hewlett-Packard computer which has a very low power consumption (50 W) and a Kraeckmann multi-function box with a relay multiplexer, pulse counters, and a digital multimeter. Achievements: The load demands and the supply fractions of PV, wind and Diesel were: for 1988: 2700 kWh, (77 per cent PV, 0 per cent Wind, 23 per cent Diesel) for 1989: 2900 kWh, (81 per cent PV, 0 per cent Wind, 19 per cent Diesel) for 1990: 3000 kWh, (75 per cent PV, 8 per cent Wind, 17 per cent Diesel). The system operates well and had only short interruptions. An information panel with two power meters has been mounted for visitors at the Rappenecker Hof. Prime Contractor: Fraunhofer Gesellschaft zur Förderung der Angewandten Forschung e.V. (FhG); München; Germany.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Stuttgart ? Dieselkraftstoff ? München ? Schwarzwald ? Photovoltaikanlage ? Solarenergie ? Energieversorgungsnetz ? Photovoltaik ? Windenergie ? Wind ? Wohngebäude ? Solaranlage ? Bundesrepublik Deutschland ? Elektrizität ? Energieträger ? Energieversorgung ? Gebäude ? Geschiebefracht ? Landwirtschaftlicher Betrieb ? Verfahrenskombination ? Gastronomie ? Dauerbelastung ? Batterie ? Stromerzeugung ? Gebühr ? Europa ? Energie ? Energieverbrauch ? Modul ? Versorgungsunternehmen ? Alternativtechnologie ? Speicherfähigkeit ? Berg ? Energietechnik ? Energiequelle ? Angewandte Wissenschaft ? Wirkungsgrad ? Gebirge ? Umweltfreundliche Technologie ? Heizung ? Energiespeicherung ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1983-12-01 - 1990-12-31
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