It turns out that in Polish climatic conditions it could be the special problem with overheating of rooms located at west side of a building. In summer west vertical surfaces (see Fig.6) receive much more solar radiation than south vertical surfaces. Taking that into account and analyzing distribution of solar irradiance on surfaces with different inclination and orientation throughout the whole averaged year the decision was made according to the final shape of the building (see Fig.1 and Fig.7 -8) [3]. The main facade has partly flatted cylindrical shape and is directed from the south — east to the south — west direction. The back side of the main building (see Fig. 7) is directed to the north (from north — east to the north — west). The EDI building consists of segments with different orientation. For the main facade, starting from the east to the west, it is as following: — 420, — 310, — 190, — 80 (main hall in the centre of the EDI building), +30, +140, +260, +370 (small

segment between EDI building and the swimming pool), +420 (the swimming pool). The roof of the EDI building is inclined at angle equal to 30o (see Fig.8) and consists of the similar segments as the vertical part of the building.

The architectural concept of the 3 storey IEB building has been developed with regard to active and passive application of solar energy. The shape of the building assures maximum gains of solar energy per year for active and passive systems. Shading elements are also included. Apart from traditional devices as blinds and building envelope elements as overhangs, the PV modules are to be applied and natural green environment (building is to be surrounded by pergolas at the front glazing facade). PV modules are to be located on the roof with slope of 300 and constitute shading elements over balconies of hotel rooms and over the main entrance — reception hall (glazed roof) in the middle of the building.

All “south” rooms at the first floor are seminar and lecture rooms. The main open space is the central hall, that can be used as a conference hall, banquet hall and exhibition area. Hotel rooms are at the second and third floor, mainly at the “south” side. The “north” side is designed as not living room space. It will include technical rooms, stores, measurement — monitoring rooms and some office rooms.

Heat will be supplied to the building by ground heat pumps, solar collectors and auxiliary biomass boiler located at the boiler room at the east side of the building (the plantation of energetic willow will be located nearby.

The IEB building is connected at the west side with the swimming pool and fitness center. Shape of a roof of the swimming pool is shown in Fig. 1 and Fig.7. The slope of the roof is 350, and the orientation is +300. The roof has been especially designed in such form to improve solar energy utilization. Solar collectors will be located at the roof and will supply heat to the swimming pool and the IEB building. Laboratory buildings are connected with the IEB building via bypasses shaded by PV panels on passes roofs. Location of all buildings and active solar systems has been analyzed taking into account the shading of the surrounding elements: natural (trees) and artificial (building in the vicinity). At present, technical concept of the Center is under development.

References

[1] D. Chwieduk, Some Aspects of Modeling the Impact of Solar Energy on the Energy Balance of a Room, Solar Energy (in print).

[2] D. Chwieduk, B. Bogdanska, Some recommendations for inclinations and orientations of building elements under solar radiation in Polish conditions, Renewable Energy Journal, 29 (2004) 1569 — 1581.

[3] D. Chwieduk, E. Kossecka, P. Murza — Mucha, Opracowanie kompleksowej koncepcji Centrum i szczegolowych zalozen do jego budowy, Raport projektu Konwersja Energii i Zrodla Odnawialne — Centrum Badawcze w Jablonnej. Zadanie II.1.

[4] D. T. Reindl, J. A. Duffie, W. A. Beckman, Evaluation of Hourly Tilted Surface Radiation Models, Solar Energy, 45 (1999) 9 -14.