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Solar powered internet methods

389 bytes added, 18:02, 13 March 2012
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The potential of successful PV mesh networks is based on five variables: # system design and # sizing, # solar energy availability, # economic analysis, and # integrating geospatial information to optimize deployment locations.  An example system was designed and built to assess the economic feasibility and overall system design.
===Design Methodology===
The following design methodology was created, employed and demonstrated in an example system. The sizing of the electronic components was determined using [ PVSyst].   Include here exactly how this was done - e.g. screen shots explanations.  The assocaiated associated converters and controllers were selected to optimize efficiency while minimizing cost and necessary components. Mechanical components including the structural elements, mounting hardware, and fasteners were selected based upon the following criteria: cost, weight, strength, component life, transportability, ease of use, and maintenance. The structural support system was designed to hold the solar array at the optimum angle for the latitude at which the system will be utilized. Using the design methodology, several example systems were built for testing. For the mechanical design show how this was done. For the components - give a list and a weblinks to all parts.
===Sizing of system parts===
The control of all the converters is controlled by a Microcontroller.   What kind? The results of sizing from PVSyst obtained are as 13Ah capacity battery, 92Wp capacity solar panel, Generalizing the design, a 10 ultracapacitor bank of 3000F each is being selected as the storage, and a 190Wp solar panel is used. Material properties for each mechanical component were assessed to ensure all components could withstand the loading conditions including wind loads, rain loads, and snow loads (PV Systems Engineering 2006). Each mechanical component was then sized using a factor of safety of 1.5. Is this common? How do you justify such a pad? 
Equipment: PV panel, ultracapacitor bank, router, converters, batteries, hardware - this will be based on either PVSyst or GRASS/rsun in ArcGIS.
The current options of Routers are the Netgear CG 3000d -18W, Cisco Linksys WRT54-- 6W.   Says who? Say where this came from Going with an autonomy of 1 day and a maximum Loss of Load of 5% we can arrive at the size of the system as follows:
Ultra cap size = (Total Wattage * number of hours *allowed autonomy)/(Depth of Discharge*Efficiency*Operating voltage)
===Hardware Implementation:===
The implementation of the hardware is going to be made using DC/DC converters as shown in the schematic shown below
Describe what is going on below
The afore mentioned system was built and tested using the following methodology. The system, comprised of three stand alone units, was placed outdoors with each branch unit roughly 500 meters from the main unit. The range and capacity of the mesh system was then measured. Finally, current and voltage readings for each unit was collected. Since the units were placed on rooftops, it was assumed that shading played a limited role and that systems were placed in an optimized location above shaded areas. Therefore, calculations regarding orientation and sizing due to shading parameters were ignored.
==See Also==* [[Solar powered Internet literature review]] [[category:MOST literature reviewsmethods]]
[[category:Green IT]]

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