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Solar Energy in buildings
Anni Dobrinova, Stanko Shtrakov, Alexander Penchev
Abstratct: - The guidelines offered in this study are intended to assist the everyday practice of Bulgarian architects. The aim is to improve the quality of projects by introducing energy indicators and modern energy-saving technologies. This will make it possible to control energy consumption not only in individual buildings, but also in the urbanized structures of the environment.
The geographical location of Bulgaria offers good prospects for solar energy utilization. Regional meteorogical data show that throughout the country climate conditions provide possibilities for s serious allevation of the current grave energy problems. In this context, the present work is aimed not just to make reader familiar with the problem, but to give the architect a set of toolsand summarized guidelines how to take his decisions in the process of planning. This would guarantee that the specific requirements of solar systems will be taken into account and applied already at the earliest stage of architectural projects:
- how to apply the data about climate conditions in archtectural planning;
- how to implement the demands of solar systems, thier components, schemes and operating principles;
- how to determine collector field inclination and orientation;
- how to select the appropriate form of buildings;
- how to choose appropriate area;
-how to find a proper location for collectors and machine components;
- how to estimate the energy saving efficiency of solar systems.
By complying with these requirements the architect does not take over the role of the engineer in the designing of solar systems. He only performs his part of the interdisciplinary co-operation for the development of solar houses. Thus, the time for planning is reduced, and re-planning of projects and reconstructions in the building at a later stage are avoided. In this way the project quality is improved and the buildings are provided with surfaces reasonably adapted to profit from the solar energy either by heat from solar collectors (Active Solar Systems) or by the very structure of the buildings (Passive Solar Systems)
Key-Words: PV system, active thermo system, hot air dry room, combined grid-connected solar system