7. This embodiment will encourage the generation of turbulent motion in the wind flow, thereby increasing the fraction of wind energy imparted to the energy harvesting device of the invention. 3. A piezoelectric element fixed on the surface of the device deforms due to vibration of the wind, generating power by piezoelectric effect.
A series of such hair-like elements may be arranged in rows as in Figs 2a and 2b. In Fig. As will be obvious to one skilled in the art, other arrangements may prove beneficial such as the electrical connection of multiple elements in series to generate larger voltages and correspondingly smaller currents.
Each subgroup can then be rectified, either in parallel or in series. 2a the elements are connected in parallel and rectified together with a single rectifier, while in Fig. It is an object of the present invention to provide a method and apparatus for efficiently generating electricity from generally unidirectional liquid flow. Due to the fixed nature of the attachments of these flag shapes to their bases, wind coming from any direction off-normal to the base will produce a correspondingly reduced effect, and the device therefore cannot harvest wind energy from all directions. Dolor de hueso de la pierna . It is therefore a long felt need to provide a wind-energy harvesting device extracting a useful fraction of the available wind energy and operable for feeble winds. While for convenience of disclosure certain embodiments of the motors of the present invention have been illustrated and these will have at least one pair of counter-rotating side-by-side motors as by providing two of the motors shown in FIGS.
Reference is now made to Figs 6c and 6f presenting a preferred embodiment of the current invention.
Another known method of controlling the location of hydrodynamic motors submerged in river and ocean currents, disclosed in U.S. Generally geometries where one dimension is much larger than the other two dimensions are used, but other geometries may also be employed. The piezoelectric effect occurs in certain materials where mechanical stress causes an internal electric field that can be sensed at the edges of the material as a stress-generated voltage. In Fig. 7 presents a preferred embodiment where a plurality of intake ports 1130 is cut into a planar tunnel-like structure, encouraging fluid flow in the direction shown in Fig. Reference is now made to Figs 6c and 6f presenting a preferred embodiment of the current invention. An arc of about 80-90 degrees is preferred. A further object of the invention is to disclose the elements which are at least partially made of material selected from the group consisting of: quartz, cane sugar, gallium orthophosphate, langasite, barium titanate, lead titanate, lead zirconate titanate, potassium niobate, lithium niobate, lithium tantalite, sodium tungstate, Ba2NaNb505, Pb2KNb5015, Na Nb, bismuth ferrite, sodium niobate, polyvinylidene fluoride, tourmaline, topaz and any combination thereof.
A further object of the invention is to disclose the energy storage device selected from the group consisting of: capacitor, supercapacitor, battery, lead acid battery, NiMh battery, NiCd battery, Li-ion battery and any combination thereof. Useful electrical energy may be extracted from random voltage fluctuations by rectification. It is within provision of the invention to use other means of rectification or electrical energy extraction from random or quasi-random voltage fluctuations as will be obvious to one skilled in the art. To produce electrical energy from the device, the random voltages expected from randomly oriented wind gusts or due to other vibrations are preferably rectified so as to produce a nonzero average voltage.
Since the panel can harvest energy all day long, such a panel may be expected to produce 2.2 Kwh/m2/day. Thus, a wind-energy harvesting panel of the current invention can be expected to generate approximately four times the power of a photovoltaic panel of the same size Moreover, usually climates which lack sunny environment, are characterized by a colder, windy climate and thus the technology can be even more effective to those areas than photo-voltaic panels.
Dolor Muscular En El Pecho
A further object of the invention is to disclose the fluid energy harvesting system configured for rotation thereof according to an instantaneous fluid direction. A further object of the invention is to disclose the fluid energy harvesting system provided with a rectifier. But again the described air-flow manipulation is limited by requirements for: a sufficient minimum threshold of wind speed; a clear path for air across the flag-like members and beyond; geometric limitations of the environment; and the direction of gravity. Inyecciones para el dolor lumbar . As will be appreciated by one skilled in the art, the invention can be implemented with fewer limitations than the prior art, most importantly allowing for arbitrary airflow direction. The elements are at least partially made of a piezoelectric material. NSF grant 0501187 funded the study of wind generated energy using flag-like piezoelements composed of flexible piezoelectric materials positioned parallel to the wind direction, which undulate or flap in a manner similar to a waving flag, due to the well-known Kelvin-Helmholtz instability.
The patent describes a member which is limited by wind direction and intensity, installation options, cost (implanted piezoelectric layer) and reliability (exposure to foreign objects and environmental harm). The stresses induced in the piezoelectric material by this flapping generate a voltage (due to the piezoelectric material properties) between the electrodes positioned on the surfaces of the piezoelement, thereby generating electrical power if connected to an electrical load. The following description is provided, alongside all chapters of the present invention, so as to enable any person skilled in the art to make use of the invention and sets forth the best modes contemplated by the inventor of carrying out this invention. The battery used may likewise be any known in the art such as lead acid, deep cycle lead acid, NiMh, NiCd, and lithium-ion. A tunnel- like system 1200 comprises a passage 1 160 accommodating a plurality of resilient elements 1120. The elements 1120 are at least partially resilient.
The cover may further itself be a part of a mechanical system designed to increase the fraction of energy harvested from the fluid flow. Formation of solitons and other flow structures may be found to have beneficial effects for purposes of energy extraction from the wind and are included within provision of the invention.
Mechanical energy-harvesting technologies based on this effect have been disclosed in several forms, such as placing piezoelectric transducers under roads for using the vibrations created by cars, components to collect motion of ocean waves, piezoelectric tiles under sidewalks in crowded areas, and piezoelectric fibers to be incorporated into fabrics for converting human motion into a personal electric source.
- Dolor crónico neuropático central
- Irregularidades en el tránsito intestinal
- Aura[editar | editar la fonte]
- Realizar actividad física moderada
- Problemas en la piel
- Mareos, temblores o espasmos
- Blade width 0.6 to 1.4 m, preferably about 1.2 m,
Variability of sizes and shapes of the piezoelectric elements to cover a wider range of self- resonant frequencies correlated with the turbulent characteristics of the fluid flow is in the scope of the current invention. 6f, presenting alternative embodiments of the element 1120. Natacion para dolor lumbar . Specifically, a basal element 1152 alternatively carries a piezoelectric panel 1141, a single fiberlike piezoelectric element 1142, piezoelectric elements with longitudinally and laterally oriented fibers 1144 and 1146, respectively. A second portion of said entering liquid flow enters each subchamber 72, 74 directly without being deflected by said outer wall 108. As a first vane 228, 231 approaches the position generally parallel to flow direction, the vane is completing a period during which it was rotating counter to the direction of the entering liquid current flow during which time the subvanes associated with said vane were pivotally positioned parallel to the direction of fluid flow as previously described herein thereby creating openings in said vane through which the liquid flowed relatively unimpeded.