PHOTOVOLTAIC WATER Solution
The current energetic properties of the residential complex are at the level of 1978-1979, ie, with non-insulated walls, a myriad of extreme heat bridges, a central gas-fired heating system and electricity driven boilers for decentralized production of hot water; features which all correspond to the normal standard of residential buildings in the 1980s.
The final energy consumption for heating and hot water can be lowered from the current level of approximately 135 kWh /m²a to about 8 kWh /m²a through the modernisation of the system - this corresponds to a total energy reduction of approx. 94 % (95 % for space heating, hot water for about 45 %).
This is achieved by:
- the use of a special superior gap solar facade that comes with pre-function panels (passive solar honeycomb panels) and a safety glass plane as the outer skin
- with decentralized ventilation units with heat recovery and façade-integrated photovoltaic modules for the DC-based hat water heating
- as well as generously sized balcony window surfaces of passive house quality
The present project should carry out a wide range of functional tests, especially with the new approach of using locally generated solar power in the building compound with a primary focus on building integration (facade-integrated photovoltaic modules), the achievement of a high degree of prefabrication as well as the low-tech approach (DC based hot water heating, i.e. no inverters, no power supply, no counters. The proof of the efficiency of the energy system should be provided with appropriate monitoring.
Bmst. Ing. Mayrhofer Otmar Gemeinnützige Industrie- Wohnungsaktiengesellschaft