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Using existing fences as near-zero-cost racking solution for PV deployment – pv magazine International


American researchers have proposed utilizing metal zip ties to connect photo voltaic modules to the fences of animal farms as a low-cost racking resolution for agrivoltaic functions. They discovered that the proposed methodology is technically and economically possible, if cautious wind load checks are carried out on the fences.

A bunch of US-Canadian scientists has proposed using current fences in animal farms as an inexpensive racking resolution for photo voltaic modules.

“That is most likely the lowest-cost methodology of racking,” corresponding writer of the analysis, Joshua M. Pearce, mentioned. pv journal. “What we did was present that at the very least one PV module between two straight posts is mechanically acceptable for each sort of typical farm fence. On this case, racking is sort of free. “

Researchers have recognized three foremost fence varieties: fences primarily based on a number of battens positioned between foremost posts to help the fence wire; fences utilizing posts to which wires or fence mesh are connected; and fences that use prefabricated meshes in several designs that swimsuit the wants and generally aesthetics. “Often for fences, excessive tensile metal wire and delicate metal wire are generally used,” they mentioned. “Their diametric dimensions are often 4 mm, 3.15 mm and a pair of.5 mm for top tensile (HT) wire and delicate metal wires.”

To find out if an current fence can be utilized for photo voltaic deployment, builders should first examine whether or not the fence can stand up to a sure wind load in a sure location with the addition of PV panels. , in addition to the topological, geographical and climatic challenges of the area. . Concerning this, the group mentioned that particular consideration ought to be given to the road submit measurement and distance play, including that the principle issues to contemplate are the peak of the fence, footing depth, design and mesh measurement of the mesh, in addition to the fabric power of the poles.

The scientists additionally defined that wind load measurements ought to be made utilizing the Major Wind Drive Resisting System (MWFRS) and Parts & Cladding (C&C) strategies, in addition to the Open Supply Wind Load Calculator, which is a instrument used to calculate wind. load on a fence in a given area of the USA. “This system outputs wind hundreds by way of base shear drive in pound drive (lbf) and base second in ft pound drive (ft-lbf),” they specified, including that they calculated a spread of wind hundreds from 80 mph. to 150 mph (129 km/h to 241 km/h).

The lecturers carried out a sequence of area checks utilizing three Cheetah HC 72 M monocrystalline PERC panels manufactured by China-based JinkoSolar. They are saying their set up is definitely completed by two individuals, with mounting a module requiring seven minutes and a complete of 4 zip-ties.

In addition they carried out a sequence of simulations for retrofitting current farm fencing for a variety of farms, together with sheep, goats, pigs, cows, and alpacas, and located photo voltaic undertaking primarily based on the proposed methodology that may be economical in the USA.

“The price of the racking retrofit is simply the price of 4 stainless-steel zip ties per module, which will be bought in 120 packages for $11 or about 37 cents per module,” they defined. “If the modules have energy from 250 to 500 W then the price of racking an current fence is lower than a penny a Watt.”

Pearce mentioned the analysis workforce additionally outlined what the very best inverter technique could be relying on how a lot vitality a farmer wanted. “Small farmers can use the free e-book to arrange the design for the system, do the set up with metallic zip ties themselves, after which simply have to name an electrician. to connect to the grid,” he concluded.

The scientists offered their findings within the paper “The potential for fencing for use as low-cost photo voltaic photovoltaic racking,” revealed in Photo voltaic Vitality. “Future work is required to find out the total scope of the advantages of this methodology of vertical PV agricultural fencing on a world scale,” they mentioned, trying ahead to how the proposed methodology will be improved.

The analysis workforce consists of teachers from Western College in Canada and Michigan Technological College in the USA.

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