Turn – key solutions:
Photovoltaic Systems (Roofs – Lofts – Parks)
Autonomous or Hybrid Systems (Wind Generators – Photovoltaic)
Energy Saving for buildings and houses
Automation Systems "smart buildings"
Electric Mechanical Installations
The photovoltaic cell - a thin processed semiconductor – transforms the solar energy into electric energy. Solar photovoltaic cells properly interconnected form the photovoltaic panel or else photovoltaic module, with typical power of 10 W to 300 W. A number of photovoltaic modules electrically connected, form photovoltaic arrays.
Photovoltaic panels can be either installed on roofs or lofts, or they can be used on the ground to construct photovoltaic parks.
Autonomous – Hybrid systems
Autonomous systems are electrical power systems not connected to the grid. Using Renewable Energy Sources, electric current is produced which can be used either directly or stored in accumulators (batteries). In this way electricity can be provided to rural residences, roads, parks or airports, signal traffic lights, water desalination, alarm systems etc.
Hybrid is the system that uses a combination of two or more RES (e.g. photovoltaic and wind generators).
Wind, like the sun, is an inexhaustible energy source free to use. Small wind generators are a viable solution for residences with no access to the grid. Like other renewable energy technologies (e.g. photovoltaic), small wind generators can be used for electric current production as autonomous or in hybrid systems.
A few meters below earth surface, ground temperature is stable (18 – 20oC). By exploiting temperature difference between subsoil and surface, one can heat during winter and cool during summer. Using a geothermal heat pump and a suitable network of piping, function costs for heating can be decreased by 80% and for cooling by 60%. The same technology can be used for domestic hot water or for warming swimming pools etc.
With the solar thermal technology, water is directly heated from solar energy using the greenhouse effect developed in the collectors. Water circulates naturally and no mechanical parts (pumps etc) are required. Solar Thermal systems can support central heating, domestic hot water, heating of swimming pools etc.
Lighting accounts for 25 – 40% of the total energy consumed in buildings. Solar lighting system is a new technology that transfers natural light into buildings’ interior thus replacing conventional electrical lighting.
Solar lighting systems are easy to install, is highly efficient until late in the evening and saves electricity thus improving the energy efficiency of buildings.
In Greece, buildings consume 34% of the total energy consumption (2005) with heating representing 61% of the total. Using modern technologies in new buildings as well as in the existing ones, more efficient energy use is achieved combined with occupants’ optimal comfort and quality of internal air.
Automations - «smart buildings»
«Smart buildings» comply with all international standards on wirings and are provide the infrastructure for installing automations for lighting, heating, fire detection, doors’ and windows’ control etc. The system can be operated from different points through e.g. text screens. Moreover, all appliances can be checked using mobile phones and the system notifies the owner for its functional state.
Thermography detects the temperatures of building’s various materials and thus its thermal efficiency is interpreted. Thermographic inspection can also detect humidity as well as electric insulation thus preventing plausible malfunctions and facilitating their repair.