The building is erected around the main-reservoir column, which constitutes both its skeletton and heating core.
The general shape of the building is ruled by the importance to minimize the turbulences that could disrupt the smooth operation of the windmill. Optimized aerodynamics is required as much as possible, whatever the direction of the wind.
An octagonal cross-section of the building has therefore be preferred for our project.
The building being preferably erected on the ridge of a hill with gentle slopes to reinforce the wind speed, a nice scenery can be expected all around. Large windows and balconies will then be managed on the periphery of the building.
The floors at each storey of the building will integrate a low-temperature heating-system fed from the water-storage directly or through the heat-pumps.
The roof of the building is constituted by a large (180m²) and flat area facing full-South with a slope depending on the latitude of the place in order to maximize the solar energy inputs in summer. Since the day-time is long in summer, large quantities of heat are expected be stored in the seasonal underground water-tank, which is thoroughly insulated. An horizontal terrace (80m²) made of reinforced concrete allows an easy access to the system for installation and maintenance.
The water from the auxiliary storage tanks is circulated in those panels using electric pumps with variable rate to optimize the efficiency.
Three photovoltaic solar panels of 21m² each are installed on the pyramidal parts of the roof facing South, South-East and South-West. Their tilt angle is higher (54°), so as to privilegiate inputs in winter, when heat-pumps could be solicited.
The attached stationnary battery-banks are installed in the underground technical-room, together with the 220V inverter, various water pumps and heat-pumps.
A canadian well will be used to cool the building in summer and to renew the air in winter. It is illustrated in the following sketch with another alternative for the building.
In the main project, the octagonal column supporting the tower of the windmill and used as the main water tank, is made of reinforced concrete directly poured on the site.
An alternative is possible. Make a partnership with a local provider and installer of masts for the huge industrial wind-generators, that should probably be active in these windy regions candidates for our project.
We could use their know-how, transporting and hoisting facilities to install the civil-works and the first section of their steel-mast. The section is compatible with our design (2m or 3m wide).
It could be made waterproof by sealing the access door at the bottom. An interface with the windmill metallic tower could be easily managed as well as the specific devices to secure the water-stirrer in the upper part of the mast.
Some metallic supports could also be easily welded on the mast to anchor the floors of the building around. The botton part of the mast would be used as the main water-tank of the heating system.
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