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The principal scientist for E2G Solar LLC, under contract with New York State Energy Research and Development Authority (NYSERDA) demonstration projects, discusses how SolarWave’s real-time performance data resulted in rapid, accurate identification of multiple design and construction problems in the solar thermal system at a local laundromat/ carwash in Hoosick Falls, NY. Results? Problem solved and proof that solar energy improves a business’ bottom line while reducing its carbon footprint. “Ever since we completed the installation of a 10-panel drainback system and the SolarWave Advanced Energy Monitor (AEM), we noted pumping rates did not meet design expectations. We examined the data carefully and concluded there was a blockage in the solar array return pipe. After we disassembled that line and indeed found the impediment, we thought our pumping problems were over. Wrong! New data that the AEM provided revealed another problem – erratic flow rates and periods of no-flow whatsoever. This information sent us on a new quest: again, we reviewed the flow and temperature data and decided that we should move the pump – but that didn’t work. In desperation, we reviewed our piping design and realized that our drain-back tank bypass line allowed returning fluid laced with air bubbles to enter the pump. We cut and capped the drain-back bypass and tried the pump again. The pump ran solid – AT LAST! The bypass caused a liquid/air mix to reach the pump, inducing cavitation. No more drainback bypasses in my designs! Now the public and NYSERDA can see just how well solar-thermal systems can improve the bottom line and reduce the carbon footprint of this facility in Hoosick, Falls, NY. “Thanks, SolarWave!” Peter N. Skinner, P.E. Principal Scientist – E2G Solar, LLC |
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