As living standard increases, a lot of energy is being used to air-conditioned the building, to heat the water, to chill the food, and for other purposes mostly for the comfort of the people in the building. Though some of the purposes are well justified, energy demand causes fast depletion of natural resources, and thus better ways of harnessing energy from alternate and renewable sources are needed. It is also important to improve energy performance of the building, reduce energy need of the appliances, and readjust the energy consumption habit for sustainable lifestyle. To achieve the objective, many countries throughout the world have setup policies, legislation and incentives to encourage or enforce the architect to rethink and redesign the building energy efficiency, and the indoor environmental conditions.
Many products have been developed, tested and deployed. Photovoltaic system and solar water heating system have both been installed and used on the roof for many years. Both serve their function well and receive great acceptance. However, both products are competing for roof space which is limited and expensive in congested city areas. It is thus not surprising that both systems should be integrated as one to complement each other. The solar collector itself can be a good choice of roofing and wall material as it comes with large flat surface, and with good tensile strength. This invention provides a cost effective roof and wall material, which also generates energy from solar thermal and PV cells attached to the outer layer, regulates the temperature of the walls, and allows heating of water and/or space. It is highly modular and easily installed on most building structure.
A primary object of this invention is to provide a roof and wall system with multiple functions that include shielding a building from the elements, generating electricity, collecting and regulating thermal energy concurrently.
Another object of this invention is to provide dynamic thermal control to regulate the building interior temperature so as to reduce the heating and cooling energy consumption.
Another object of the invention is to provide a modular multiple functional roof and wall system to meet different building design.
The present invention also envisions a combination of a plurality of the multiple functional roof and wall system and a water heating/cooling system mounted on the building in a manner to collect solar heated water or fluid, or night sky cooled water or fluid, and provide building comfort that experiences daily temperature variations. It acts as a large active thermal mass on the roof and wall, regulates the daily temperature fluctuation, and reduces the energy consumption of the building. Plumbing components such as pipes, joints, pumps, valves are connected to the roof system so as to enable the flow of fluid or fluid with additives in the hollow channels of the multiple functional roof and wall system. The combined system is driven by a smart controller, which dynamically controls the building thermal insulation. The fluid subsequently releases or absorbs the heat from a water or fluid storage system. Either warm or cool water are collected by respective storage tanks for further uses.
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