A new and efficient hybrid approach for producing electricity from the wind using piezoelectric materials and from the abundant energy of the sun, using nanoantenna (nantenna) electromagnetic collectors (NECs)
These technologies will be brought together in a leaf design, these Nanoleaves will be fitted to natural looking tree structures.
Nanoleaf devices target mid-infrared wavelengths, where conventional photovoltaic (PV) solar cells are inefficient and where there is an abundance of solar energy. The Nanoleaf Leafstalk is made from piezoelectric material that will convert the movement of the nanoleaf induced by the wind into electricity.
The energy reaching the earth in both the visible and IR regions and the reradiated IR energy are under-utilized by current technology.
these structures have the ability to capture electromagnetic energy and convert it to dc power at efficiencies approaching 84%
It has been demonstrated that optical antennas can couple electromagnetic radiation in the visible in the same way as radio antennas do at their corresponding wavelengths.
The trunk is the part of the tree that connects the Nanoleaf crown with its mounting roots. This allows the Nanoleaves to harvest Solar Radiation and wind energy to produce electricity, which is then transported down to the base of the trunk. The trunk is made from environmentally friendly recycled polymers and synthetic resin to give it strength.
The outer core of the trunk is available in different designs according to species.
The actual motion of artificial trees in a wind field depends on various factors, such as the stiffness and length of branches, the size and shape of leaf crowns, the conditions of the wind field, and turbulence inside the tree crown. Therefore making use of high-quality thermoplastics from renewable resources. The raw material is lignin, which is second only to cellulose as the most abundant natural polymer.
Lignin is a by-product of the pulp industry and the supply volume is rising worldwide.This material is clean by ecological standards, ensuring more environmentally sound manufacture and disposal.
The Petiole or leafstalk is incorporated with piezoelectric ribbons that react to a multitude of forces, tension,compression, bending, shear, torsion (movement). This strong and reliable material can provide additional energy output and guarantees no loss of leaves during a storm or rain shower. The Leafstalk is very versatile and easy to install on a twig or branch and is all weather type secured via its cable tie connection, this enables the leafstalk to harvest and capture kinetic energy as the nanoleaf moves and bends or vibrates as rain drops impact the surface.
Designed to exploit movement from the wind. Our trees will have to obey laws similar to those found in real trees and plants. Embedded piezoelectric ribbons in the joints of branches, twigs and petiole that will ‘scavenge’ energy from ambient and environmental sources, and the interactions between/within the artificial tree or plant structure and soils, assure a multitude of forces tension,compression, bending, shear, torsion will supplement the power output coming from the artificial leaves that deliver the majority of electricity via their incorporated electromagnetic collector
Nanoleaves, besides converting the visible spectrum of light, Nanoleaves also convert invisible light, known as infrared light or radiation. Due to the unique abilities of Nantenna electromagnetic collectors in our Nanoleaves which convert visible and mid-infrared radiation into electricity, the energy harvesting continues hours after the sun has set.
The more wind there is,the more Nanoleaves are moved. Wind that is moving thousands of Nanoleaves in a tree canopy are causing mechanical strain in the petiole, twigs and branches. Nano piezo-electric elements incorporated into the petiole twigs and branches are the tiny Nano piezo-electric elements that will generate millions and millions of Pico watts as these thousands of Nanoleaves flap back and forth in the wind.
The stronger the wind, the higher the “flap” frequency, and therefore the larger the watts generated in the petiole, twigs and branches.
The design and spatial distribution of the Nanoleaf active surface area, especially leaf size, density and orientation, strongly regulates electromagnetic harvesting as well as the electricity output.
The occupation of three-dimensional space and the characteristics of branches on which nanoleaves are arranged, combine to generate wide variations in branch and tree level architectures and corresponding variations in nanoleaf angles/orientations and self-shading.
All of these variations in the spatial arrangement of nanoleaves and branches influence radiation intercept
(1) Light, scalable, robust structure
(2) Low cost
(3) Attractive bio-compatible design
(4) Easy installation, operation and maintenance
(5) Reconfigurable morphology
(6) Usability in a wide range of environments
(7) Broad response band to wind speeds and directions
Considering unpredictable wind strength, we choose flexible and robust piezoelectric materials (PVDF) as the essential component of our nanoleaf device.
The advantage of parallel Solar & wind-vibration energy harvesting is in their robust, simple and maintenance-free monolithic construction, the ability to scale from miniature sizes to large scale through parallelization, and natural blending in with both urban and natural environments.
When developing the structural integrity of the trunk, branches and limbs for our energy harvesting trees, we apply our knowledge of tree structures and their dynamic loads. Trees are regarded as important for a variety of environmental,social and economic reasons.
They add to the landscape character of an area, preserve biodiversity,provide shade and shelter and habitats for fauna. Potential economic benefits include increased property values from high amenity, well treed areas. A tree is one of the noblest works of nature. It has been said that a home without trees is cheerless; a road without trees is shade-less; a park without trees is purposeless; and a country without trees is hopeless. The appearance and general environment of many streets is improved considerably by the presence of trees.
Trees soften the harsh lines of paving, buildings and can screen the ever-present and monotonous stobie pole. In addition to providing shade in summer, they provide a welcome contrast to long stretches of asphalt road. Screening unsightly properties can be achieved, to say nothing of checking traffic noise and purification of air polluted by motor vehicles and industry.
The challenge lies in the ability to fully harness this free energy source!Solar energy, however, is plentiful since enough reaches the Earth’s surface every hour to meet the world’s annual energy needs. The problem lies in harnessing it, but nature has perfected in photosynthesis a highly efficient and flexible means of doing this across a wide variety of scales from isolated bacterial colonies to large forests.