280 likes | 396 Views
Photovoltaic Co-generation. Group Members Trecia Ashman Paola Barry Zarina Zayasortiz Sponsored By: Duke Farms. Objective.
E N D
Photovoltaic Co-generation Group Members Trecia Ashman Paola Barry Zarina Zayasortiz Sponsored By: Duke Farms
Objective To develop a photovoltaic cogeneration system for Duke Farms in Hillsborough, NJ. In order to explore another method for the generation of electricity using a renewable resource.
Photovoltaic Co-generation • Photovoltaic cells are used to harness energy from the sun. This energy can then be directly converted to electricity and be used to power your home or other facility.
Co-generation System • A “parallel” system • Role of Components: • PV Panels • Inverter • Meter • Power Distribution Grid • 3-phase AC Power
Co-generation vs. Storage • Converting to 3-phase AC Power • Only supply residences on site • Necessary storage amount • Cost of storage
Answers From Duke • Reasons for interest in project? • Informal discussions increase public awareness about photovoltaic solar energy conversion • Constraints on potential locations? • 2-4 acres on routes of tours (park areas preferred because of security) • Different uses of electricity on site? • Strictly employee housing, security lighting
PSE&G Specifications • In order for the Co-generation system to be approved it must meet the following standards: • The installation must comply with the provisions of the NEC • Modules must be UL listed • The maximum amount of sunlight available year should not be obstructed • All solar array orientations are require that the estimated system output must be 75% of the default output estimated by PVWATTS • The inverter must be certified as compliant with the requirements of IEEE 929 and with UL 1741
PSE&G Specifications • The system needs the following visual indicators: • On/off switch • Operating mode setting indicator • AC/DC overcurrent protection • Operating status indicator • Warning labels must be posted on the control panels and junction boxes indicating that the circuits are energized by an alternate power source
Tracking Options 2-Axis Tracking • North/South & East/West Fixed Plate (static panel) 1-Axis Tracking • North/South or East/West
Required Area Interpolation for 14% Efficiency
Calculations • The amount of solar panels needed is based on: • Rated output wattage of the panel • How long the panel is in the sun • NJ gets 4.6 hours of sunlight • Using 80 Watt panels • Area of one panel = 6.76 ft2 • Amount of area needed for 50kW system = 4528 ft2 • 1kW system = 1250kW-hr/yr • Power generated per month from 50kW sys. = 5208kW-hr
Preliminary Designs Pyramid tripod design • Fixed plate Single pole mount/array • 1-Axis tracking
Support Specifications • Cap: attaches to horizontal pipe to vertical pipe • includes 3/8” hardware • 2 U-bolts, 4 flange nuts, and 4 screws • Severe Condition 4 zinc-plated welded steel • Slider: attaches lower end of cross braces to rear legs and anchors both ends • Includes 3/8” hardware • 1 cross-brace bolt sized for pipe, 1 flange nut, and 4 set screws • Severe Condition 4 zinc-plated welded steel • Mounting Clamps: attaches to vertical pipe to slider • 6105-T5 Aluminum extrusion • Pipe: infrastructure of the support • 2” diameter ASTM A53B Schedule 40 galvanized steel
Items for Future Work • 1 axis vs. 2 axis based on economics • Available Space for Panels • Cogeneration vs. Storage • Gain in small battery storage • New data received last night (10:47pm)
References • PVWATTS • Duke Farms • Nrel.gov • PSEG.com • BP Solar • Shell Solar • Sharp Solar • Metersusa.com • Xantrex.com • Department of EnergyGreenbuilder.com • Howstuffworks.com