Applications have been submitted to the Ontario Power Authority (OPA) feed-in-tariff (FIT) program for 4 rooftop solar PV systems on main campus and a ground-mount system at the Queen’s University Biological Station. The total capacity for the project submissions is about 11 MW. Although the energy produced will go directly back onto the power grid, it will generate the equivalent of roughly 13% of the university’s annual electricity consumption. The university is currently awaiting contract offers from the OPA.
Update – The OPA began a review process of the feed-in-tariff rates on October 31st, 2011 and it is expected this will be completed by January 2012. During this time, no new applications are being processed and it is anticipated that the university applications will be subject to any new rates.
Solar PV System Locations
Gross Nameplate Capacity (kW)
Spacing between rows are 4.2 meters or 8.5 meters, for single-row or two-panel rows. This spacing was calculated based on Photowatt PW2750 panels mounted on a flat-roof racking system at a 30-degree tilt angle in a portrait orientation (an optimal angle for year-round energy production per performance modeling in PVSyst).
Within the models shown the single row portrait orientation setup was used for buildings with live load capacities of 40 lbs/sqft, and dual row portrait rows were used when the live load capacity exceeded 50 lbs/sqft.
For the panel being used, and based on a maximum worst case VOC of 56 volts, we arrive at 10 panels per string. The row widths shown are 5, 10 or 15 panels arranged side by side in a portrait orientation. When 5 or 15 panel rows were used, they are always placed in pairs.
With the exception of Victoria Hall, the panel rows are aligned parallel to the edge of the buildings since this simplifies the placement making the most efficient use of the space available. In the case of Victoria Hall, where the arms of the building extend out at about 56 degrees to direct south, the panels were oriented aligned facing directly south. A row width of 15 panels was used.