Modular PV Roadway Luminaire Layout for Lower Wind Loads
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Solution Overview
Problem
Conventional pole-mounted roadway and area lighting luminaires powered by PV panels face issues such as increased wind loads due to high tilt angles, costly foundations and support structures, architectural disjointedness, inefficient power generation due to high surface temperatures, and placement of short-lived devices leading to high maintenance costs and urban eyesores.
Innovation Solution
The Delta luminaire system redistributes PV system elements, positioning short-lived, heavy devices below the mid-height of the pole, uses horizontal PV panels, and integrates thermal management to cool devices, while allowing for scalable and modular power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PV panels are tilted at high angles to capture maximum solar energy, then power generation efficiency is improved, but wind loads on the pole increase requiring stronger and more expensive support structures
Solution Approach 1:
The PV panel tilt angle is made adjustable rather than fixed, allowing the system to optimize between power generation efficiency and wind load reduction. The panel can be tilted at high angles when wind is low and positioned at lower angles when wind conditions are favorable, dynamically adapting to environmental conditions.
Solution Approach 2:
The system changes the physical parameter of PV panel tilt angle based on operational conditions. By varying this parameter, the system achieves high power generation efficiency when needed while reducing wind exposure during high-wind periods, thereby avoiding the need for overly strong and expensive support structures.
2Illumination intensity
If PV panels are positioned high on the pole to avoid masking light, then lighting performance is improved, but maintenance costs and device complexity increase
Solution Approach 1:
Instead of positioning PV panels vertically high on the pole, the system transitions to a horizontal mounting configuration. This dimensional change allows the panels to be placed in a different spatial arrangement that avoids masking the light while reducing structural complexity and maintenance requirements associated with high vertical placement.
3Strength
If PV panels are positioned horizontally to reduce wind loads, then structural costs are reduced, but power generation efficiency decreases
Solution Approach 1:
The system employs dynamic adjustment of PV panel tilt angles, allowing horizontal or low-angle positioning during high-wind conditions to reduce structural costs, while enabling high-angle positioning during calm periods to maximize power generation efficiency. This dynamic behavior resolves the contradiction between structural cost and productivity.
Solution Approach 2:
The PV panel positioning operates periodically, alternating between horizontal/low-angle positions for wind load reduction and high-angle positions for power generation optimization. This periodic adjustment allows the system to achieve both reduced structural costs and maintained productivity over time.
4Ease of operation
If short-lived devices are placed high on the pole for easy access, then installation ease is improved, but maintenance frequency and urban aesthetics worsen
Solution Approach 1:
Instead of placing short-lived devices high on the pole for easy access, the system inverts the placement strategy by positioning these devices at ground level or in easily accessible locations. This inversion maintains installation ease while significantly reducing maintenance frequency and improving urban aesthetics by removing frequent maintenance points from elevated visible positions.
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 configuration reduces material and maintenance costs, enhances power generation efficiency, and improves architectural integration by minimizing wind loads and surface temperatures, creating a more aesthetically pleasing urban environment.
Implementation Method 1
The PV technology harnesses the sun's electromagnetic photonic radiation and converts the energy to electrical power
Implementation Method 2
a first thermal conductor that conducts heat away from the PV panel
Data Source
AI summary
A slimline modular inverter pod coupled to a vertical structure configured to operate unitarily or in unison with other inverter pods coupled to the same vertical structure, wherein power received by the inverter pod is generated by PV panel/s coupled to the vertical structure above, and long-lived power consuming/generating devices are coupled to and/or in proximity to the vertical structure's top and at least one short-lived power consuming device is coupled to the vertical structure assembly at two thirds the vertical structure height from grade or lower.