GeminiFocus October 2015 | Page 31

Figure 2. The Gemini Roof Cam captures workers installing the PV panels on the roof of Gemini North. Figure 3. PV panels now cover the entire roof. Photo Credit: UH88 Camera. 6.4 peak Sun hours a day as opposed to Hilo, with only 4.6 peak Sun hours a day, resulting in a 39 percent benefit; second, PV systems operating on Maunakea at low summit temperatures of ~45º F versus ~80º F at sea level result in another 10 percent improvement in performance; finally, PV systems operating almost 14,000 feet (4200 meters) above sea level, where the Sun is more intense due to reduced atmospheric absorption, results in an additional 10 percent benefit. The approximate energy output of the panels on the telescope is expected to be about 100 kilowatts. 29 GeminiFocus Gemini Observatory continues to explore new ways to improve operational efficiency. “While PV panels require a significant investment”, says Gemini Lead Engineer for the project Chas Cavedoni, “we predict that the investment will be recovered in less than four years”. The panels are scheduled for connection to the electrical grid by late October. Alexis-Ann Acohido is a public relations intern at Gemini North. She can be reached at: [email protected] October 2015