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There were 45 articles found in this category:
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  1. question101 renewable - small wind turbine and article 694 nec 2011
    The Article 694 in the NEC 2011 deals with NEC regulation for small wind turbines and it is modeled after the PV code’s Article 690. 694.1 Scope: The provisions of this article apply to small wind (turbine) electric systems that consist of one or more wind electric generators with individ ...

  2. question101 renewable - solar water pump systems
    There are really only two basic types of solar pumps; positive displacement and centrifugal and these can both be subdivided into surface mount and submersible categories. Your water source will dictate whether you need to use a surface mount or submersible pump while your daily volume requirem ...

  3. question101 renewable - pv solar panels and electric power generation (part 1)
    "Solar electricity genrated it is like normal electricity. And it is free to grab it." Solar panels or PV Panels are made of a set of photovoltaic cells connected series and parallel. Under the sun, a photovoltaic cell acts as a photosensitive diode and converts light (not heat) into electricit ...

  4. question101 renewable - Multi Megawatt PV Power Plants
    Take a step back and see how a solar power plant comes together in this 3 min. time lapse video:- ABB photovoltaic plant erection time lapse video at Stanesti Village, Giurgiu County. Ghizdaru Solar Park 35 MW x 2 it is located adjacent to Stanesti village, Giurgiu County and covers two ...

  5. question101 renewable - lift and head flow for solar pumps
    Pump manufacturers are documenting the performance of their pumps in several ways: LIFT & HEAD are used to rate the ability to move water vertically while FLOW reflects the quantity of liquid that can be moved in a given amount of time. Liquid Pumps Terminology:~ Discharge Head:~ This is the ve ...

  6. question101 renewable - Tracking Solar Panel I-V Curve
    Traking the I-V curve of an existing PV-Panel in a solar installation is paramount in obtaining an accurate diagnostic of what may impede the optimal output and the deviance of the plant's efficiency from the expected values. The focus is on the PV Fill Factor, the I-V Curve dependency of tempe ...

  7. question101 renewable -Electroluminescence Imaging and PV panels failure
    PV Panels defects are more evident when the solar array matures. PV Panels defects affect the power plant general output. Here are some of the underlined faults associated with solar panels: >_ Installation microcracks by installation footing; >_ Hailstones from storms; >_ Dropped modules; >_ ...

  8. questionWater Pipes Sizing Chart
    Friction Loss in Plastic Pipe with Standard Inside Diameter (SIDR) THIS CHART APPLIES ONLY TO: PVC pipe, Schedule 40 (160 PSI) and to PE (polyethylene) pipe with SIDR designation (most common 100 PSI black pipe). HEAD LOSS in VERTICAL FEET per HUNDRED FEET of pipe or VERTICAL METERS per HUNDRED ...

  9. question101 Renewable - Solar panels tilt calculations (fine tuning)
    Here we want to present how to harvest the most amount of solar energy using solar photovoltaic panels or solar thermal panels by fixing the tilt based on the latitude of the location.  To reach this goal we have to talk about tilt and angle orientation of those solar panels referring to positi ...

  10. question101 renewable - premium flooded batteries optimized
    Renewable energy applications operate under challenging conditions such as fluctuating or extreme temperatures, remote locations and the intermittent nature of solar and wind power generation. Designed with a 10-year battery life, Trojan Battery’s Premium Line of flooded deep-cycle batte ...

  11. question101 renewable - dummy guide to lead acid batteries
    This is a dummy guide to lead acid batteries in pv installations. Handle with care! Solar energy as the main source of thermal and electrical energy:~ Almost all of the energy we use today in a way or another derives from solar energy. The sun can be described as an enormous fusion reactor tha ...

  12. question101 renewable - how to increase the life of deep cycle battery
    The typical life of a deep cycle battery is:~ Starting (Used as a deep cycle) 0 to 12 months Marine to 6 years Golf Cart to 6 years Gelled Deep Cycle to 8 years AGM to 10 years Ni-Cad to 10 years Telecommunications (Float) to 10 years Fork Lift to 10 years Industrial (Traction) to 2 ...

  13. questionBatteries Preventive Maintenance (Surrette Batteries)
    The leading cause of premature battery failure is improper charging and poor battery maintenance.. To avoid battery sulfation, a lead acid battery must be equalized or given a controlled overcharge on a regular preventive basis. Equalization is very important and must be preformed correctly but ...

  14. question101 renewable - how to recharge and equalize deep cycle battery
    Charging a deep cycle battery goes on for quite a while following through four charging phases: bulk charging, absorption charging, equalization and float charging. The bulk charging stage is where the charging current flows constant into the battery and the battery voltage step by step will in ...

  15. question101 renewable - weather station used in solar data acquisition
    Critical to understanding about weather stations is that they do not measure some of the parameters a solar system it is direct influenced or in no case the solar productivity for a given site. The weather station provides the weather data necessary for computation of system efficiency and is o ...

  16. question101 renewable - solar tubular skylight systems
    Solar tubular skylight systems explained:~ Tubular Skylights, unlike traditional skylights, operates with virtually no heat gain. The sunlight travels through the lighting pipe and it passes through clear polycarbonate lenses with the purpose to improve the U-factor - reflective factor - and S ...

  17. question101 renewable - PV module electrical output profile
    A Guide for PV System Technicians and Engineers I-V curve illustrates the electrical output profile of a PV module, string or array and certain points on an I-V curve are used to rate the module or string performance. That is achieved in conjunction with additional reporting software. An I&nda ...

  18. question101 renewable - pv plant cable seizing dc side
    It is important to use the correct DC wire to achieve maximum efficiency from the system and reduce hazards associated with overheating. Always keep your wire runs as short as practical to help prevent low voltage shutdowns and keep the DC breaker from nuisance tripping (or open fuses) because ...

  19. question101 renewable - solar powered attic fans
    The pros of using solar powered attic fans:~ The roof’s attic is any house buffer towards environmental hardship. It protects and in the same time keeps existing house temperatures at a comfort level. During the sun rise and the suna down the roof is under continue thermal stress being b ...

  20. question101 renewable - differences between pv wire and use-2 wire
    PV - Wire and USE - 2 Wire Are both used in PV wiring applications but between them is a remarkable difference. To compare both types of wires he has to refer to general usage, wire structure, testing requirements. General usage:~ PV - Wire is dedicated for interconnecting PV modules. USE-2 Wi ...

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