Roof Photovoltaic Assembly Layout for Wind Uplift Resistance

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Solution Overview

Problem

Existing photovoltaic devices for building roofs face challenges such as complex structure, high labor costs, non-durability, poor wind load resistance, and cumbersome appearance, along with difficulties in mounting and maintenance due to a complex structure and material-intensive construction methods.

Innovation Solution

A photovoltaic device design featuring a base with adjustable rails, an inclined photovoltaic assembly, a baffle plate, and a spoiler, which enhances wind load resistance by altering the wind load profile and reducing uplift forces through optimized airflow, while simplifying the mounting process with a modular and adjustable structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a cement base is pre-constructed to resist wind load, then wind load resistance is improved, but the original roof is damaged and construction complexity increases

Engineering Contradiction:

Improvewind load resistanceVSAvoidconstruction complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The support structure is divided into modular components including adjustable support legs with adjustment mechanisms, allowing the photovoltaic system to be segmented into independent mounting units that can be installed without constructing a cement base across the entire roof

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs counterweight mechanisms through adjustable support legs that can be positioned to balance wind uplift forces, and through ballast systems that provide downward force to counteract wind load without requiring cement anchoring to the roof

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Strength

If a cement base is pre-constructed to resist wind load, then wind load resistance is improved, but labor costs and material consumption increase

Engineering Contradiction:

Improvewind load resistanceVSAvoidmaterial consumption

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The patent uses removable and adjustable support components that can be easily installed and removed, replacing permanent cement bases with reusable modular support units that reduce material consumption and installation costs

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The support structure allows adjustment of leg lengths and positioning parameters to optimize wind load resistance for different roof conditions, eliminating the need for fixed cement bases and reducing material requirements

Inventive Principle:

Principle #35Parameter changes

3Strength

If a cement base is pre-constructed to resist wind load, then wind load resistance is improved, but the photovoltaic device becomes heavy requiring strong roof support

Engineering Contradiction:

Improvewind load resistanceVSAvoidbalance weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The support structure incorporates adjustable and movable components that can adapt to different wind conditions, allowing the system to dynamically respond to wind loads rather than relying on fixed heavy cement bases

Inventive Principle:

Principle #15Dynamics

4Stability of the object's composition

If connections and junctions are filled and sealed with bricks, cement, felt, or glue, then structural completeness is achieved, but leakage and immersion prevention performance deteriorates and maintenance becomes difficult

Engineering Contradiction:

Improvestructural completenessVSAvoidleakage prevention performance

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent removes traditional sealing materials like bricks, cement, and felt from the connection and junction areas, replacing them with specialized waterproof connection components that provide both structural integrity and effective water sealing

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs composite waterproofing solutions combining multiple materials and sealing mechanisms in connection and junction areas to achieve both structural completeness and superior leakage prevention performance

Inventive Principle:

Principle #40Composite materials

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

The design improves wind load resistance, reduces mounting complexity, and enhances the structural integrity and durability of the photovoltaic device, making it more efficient and easier to maintain, while also reducing material usage and labor costs.

Implementation Method 1

a baffle plate (5) arranged behind the photovoltaic assembly in an inclined manner on the base from bottom up in a direction from rear to front

Methodology Applied

Scientific EffectWind load profile alteration: Bernoulli Effect

Data Source

PatentUS9331222B2Photovoltaic device

Publication Date: 2016.05.03 BEIJING BOE ENERGY TECH

AI summary

A photovoltaic device comprising: a base (1), a photovoltaic assembly (8) and a baffle plate (5), wherein the photovoltaic assembly is arranged in an inclined manner on the base from bottom up in a direction from front to rear, and behind the photovoltaic assembly, the baffle plate is arranged in an inclined manner on the base from bottom up in a direction from rear to front. The baffle plate reduces the profile coefficient and decreases the uplift by the action of wind load.