Interlocking BIPV Roof Tiles for Aesthetic Solar Integration
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Solution Overview
Problem
The adoption of solar technology in residential settings is limited by aesthetic concerns and the mismatch between the lifespan of solar systems and existing roofs, particularly composite shingle roofs.
Innovation Solution
The development of interlocking Building Integrated Photovoltaic (BIPV) roof tiles with a backer, which are designed to be installed over existing roof structures, offering improved aesthetics and a cost-effective solution by blending in with the existing roof surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If rectangular framed photovoltaic modules are installed above an existing roof, then solar energy generation is achieved, but aesthetic appearance deteriorates due to visual distinction from the underlying roof
Solution Approach 1:
The patent merges the photovoltaic module with the roof tile structure into a single integrated unit. The PV cells are embedded within the roof tile body, making the solar energy generating component and the roofing component one and the same object, thereby eliminating visual distinction and achieving aesthetic integration while maintaining solar energy generation capability
Solution Approach 2:
The roof tile is designed to perform multiple functions simultaneously: it provides protective roofing coverage, generates solar energy through embedded PV cells, and maintains aesthetic appearance by matching the visual characteristics of traditional roof tiles. This multi-functionality resolves the contradiction by making the solar system indistinguishable from conventional roofing
2Use of energy by moving object
If solar system is installed over existing composite shingle roof, then solar energy generation is achieved, but lifespan mismatch problem arises when roof needs replacement before solar system
Solution Approach 1:
By merging the PV cells directly into the roof tile structure during manufacturing, the solar energy generating component becomes an integral part of the roof itself. This eliminates the lifespan mismatch problem because both the roofing and solar systems now share the same service life, removing the need for separate replacement timelines
Solution Approach 2:
The photovoltaic cells are pre-integrated into the roof tiles during the manufacturing process before installation. This preliminary integration ensures that the solar system and roof structure are installed simultaneously as a unified assembly, guaranteeing synchronized lifespan and eliminating future replacement conflicts
3Duration of action of stationary object
If new roof structure is installed to match solar system lifespan, then lifespan compatibility is improved, but cost increases due to additional roof replacement
Solution Approach 1:
The integration of PV cells into the roof tile structure eliminates the need for separate roof and solar system lifecycles. By making them one unified component, the solution avoids the additional material and labor costs associated with installing a new roof specifically to match solar system lifespan, thereby reducing total material cost while maintaining lifespan compatibility
Solution Approach 2:
The unified roof tile performs both protective and energy-generating functions with a single lifespan cycle. This multi-functionality eliminates the need for duplicate investments in separate roofing materials, reducing the quantity of substances required and lowering overall project costs while ensuring lifespan compatibility
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution addresses the aesthetic concerns and lifespan mismatch issues by providing a visually integrated solar roof system that is cost-effective and requires no additional roof structure, thereby reducing installation costs and enhancing adoption rates.
Implementation Method 1
Each of the plurality of PV modules includes a plurality of PV cells
Data Source
AI summary
Building integrated photovoltaic (BIPV) systems provide for solar panel arrays that can be aesthetically pleasing to an observer. BIPV systems can be incorporated as part of roof surfaces as built into the structure of the roof, particularly as photovoltaic modules having the appearance of a plurality of roofing tiles that each have photovoltaic cells. Each photovoltaic module may include a metal backer, photovoltaic cells, and light transmissive top sheets adhered to both the metal backer and the photovoltaic cells. BIPV systems can also include non-photovoltaic modules that appear similar to photovoltaic modules, but do not collect solar energy.