Download Stand-alone solar electric systems : the Earthscan expert by Mark Hankins PDF

By Mark Hankins

One of the simplest how one can get strength to distant, off-grid destinations, no matter if in built or constructing international locations, is thru using sun electrical structures. This sensible consultant describes how one can plan, layout and set up sun electrical platforms in a way that's hands-on, picture and technically entire. hugely illustrated chapters cover:

  • solar power basics
  • components of sun electrical platforms (modules, batteries, regulators, inverters and appliances)
  • installation practice
  • on making plans and servicing systems
  • water pumping
  • refrigeration
  • village electrification.

This is the must-have advisor for electrical technicians and architects, improvement employees, and someone who desires to set up their very own off-grid process.

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Extra info for Stand-alone solar electric systems : the Earthscan expert handbook for planning, design and installation

Sample text

They must be moved constantly to follow the changing position of the sun in the sky. Concentrated solar power (CSP) stations do this on an industrial scale, collecting and converting solar heat to electricity that is sold into the grid. ‘Parabolic dishes’ are bowl-shaped mirrors that focus radiant energy upon one point where the energy is concentrated and utilized (some solar cookers use these). ‘Parabolic troughs’ focus radiation along a pipe that runs through the centre. ‘Simple reflectors’ are flat mirrors or polished aluminium surfaces arranged around a device to increase the radiation incident upon it.

For this reason, installers are encouraged to mount modules on poles, on structures above the roof or in places where they are cooled by airflow to keep output as high as possible. 6 Effects of temperature on a typical monocrystalline module output cause electrical production to fall dramatically. Amorphous and multijunctiontype modules are less affected by small shadows than crystalline-type modules. Try covering one cell of a crystalline module when measuring the current output – you can easily see the difference!

Try covering one cell of a crystalline module when measuring the current output – you can easily see the difference! indd 37 5/13/2010 6:08:01 PM 38 stand-alone solar electric systems Calculating a Solar Module’s Output The output of a module in field conditions can be estimated by multiplying the current produced by the module at load with the number of peak sun hours at the site. The operating current at load is used because, as mentioned in the I-V curve section, a module only produces its rated power at a particular voltage under standard conditions (it is not accurate to multiply the peak watt rating of a module by the peak sun hours).

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