Tilted PV Module Frame for Non-Penetrating Rooftop Arrays
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Solution Overview
Problem
Conventional photovoltaic module installations on commercial rooftops are time-consuming, require significant upfront planning, and incur high costs due to the need for numerous auxiliary components and complex logistics, especially when tilting modules to maximize sunlight exposure and withstand wind forces without penetrating the rooftop.
Innovation Solution
A photovoltaic module design featuring a frame that encases the laminate, allowing for factory assembly into a unitary structure with a tilted orientation, minimizing the need for on-site assembly and auxiliary components, and enabling non-penetrating installation with a minimal number of parts, including a polymeric frame for reduced weight and shipping costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If PV modules are tilted relative to the rooftop to maximize sunlight collection, then energy collection efficiency is improved, but wind resistance becomes more difficult to maintain without penetrating the rooftop
Solution Approach 1:
The support function is segmented between the PV module frame (which provides structural support and tilt angle) and separate support elements (legs or brackets) that contact the rooftop surface. This segmentation allows the module to be tilted for optimal sunlight collection while the support elements provide wind resistance without requiring penetration of the rooftop structure.
2Object-affected harmful factors
If conventional non-penetrating installation methods are used with multiple auxiliary components, then rooftop integrity is preserved, but installation complexity and time increase significantly
Solution Approach 1:
The frame structure is merged with integrated support elements (legs or brackets) that are either built into the frame or easily attachable thereto. This merging eliminates the need for separate auxiliary components typically required for non-penetrating installation, thereby preserving rooftop integrity while dramatically simplifying the installation process.
Solution Approach 2:
The frame structure serves multiple functions simultaneously: it provides structural support for the PV laminate, establishes the optimal tilt angle for sunlight collection, and incorporates support elements that provide wind resistance. This multi-functionality eliminates the need for separate auxiliary components and simplifies installation.
3Stability of the object's composition
If PV modules are installed with complex auxiliary components and logistics, then installation stability is improved, but shipping and handling costs increase
Solution Approach 1:
All necessary support and installation components are merged into the PV module frame structure itself. The frame includes integrated legs or brackets that provide both structural support and wind resistance, eliminating the need for separate auxiliary components. This reduces the quantity of materials that need to be shipped and handled while maintaining installation stability.
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
Simplifies the installation process, reduces labor and planning requirements, and lowers costs by allowing for rapid, efficient assembly and installation of tilted PV modules with reduced shipping and handling expenses, while maintaining effective wind resistance without penetrating the rooftop.
Implementation Method 1
solar photovoltaic systems (or simply 'photovoltaic systems') employ solar panels made of silicon or other materials (e.g., III-V cells such as GaAs) to convert sunlight into electricity
Data Source
AI summary
A photovoltaic (PV) module including a PV device and a frame. The PV device has a PV laminate defining a perimeter and a major plane. The frame is assembled to and encases the laminate perimeter, and includes leading, trailing, and side frame members, and an arm that forms a support face opposite the laminate. The support face is adapted for placement against a horizontal installation surface, to support and orient the laminate in a non-parallel or tilted arrangement. Upon final assembly, the laminate and the frame combine to define a unitary structure. The frame can orient the laminate at an angle in the range of 3°-7° from horizontal, and can be entirely formed of a polymeric material. Optionally, the arm incorporates integral feature(s) that facilitate interconnection with corresponding features of a second, identically formed PV module.