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ATTACHMENT IO Oval OQerational Efficiencies — from Staff O VAL OPERATIONAL EFFICIENCIES Since we are dealing with such a unique venue, the operation of the OVAL has been continuously adjusted by trial and error. The OVAL stiaffhas always monitored the utility usage and managed them to the best of their knowledge. After last season, we have a few more ideas that could potentially reduce utilities 5% to 10 %($3500 -$7000). • Paint the Ice Surface: The OVAL ice surface has never been painted because the size of the surface is so large. Last year, a portion of the surface was painted to help survive the heat gain from the sun. That portion of ice was the last to melt as the warm weather ended the season. Indoor arenas have painted their ice white for many years to help reduce the heat load generated by the overhead lighting. The question would be: Will the savings be significant enough to justify spending $3000 to paint the ice? Adjust the amount of run time during rain or snow: Currently, the compressors are running just enough to try and maintain a quality sheet of ice as soon as the rain or snow stops. We will try to adjust the temperature to minimize compressor run time during these situations. A minimal amount of run time is necessary to protect the markings and quality of the ice sheet. Install infrared temperature sensors: Infrared temperature sensors will allow us more instant control of our refrigeration system. Currently, the system has devices that control compressor operation based on the brine return temperature only. Since the brine is enclosed in plastic tubing, buried in concrete under two inches of ice, our system does not react quickly to the changes that take place in the environment (i.e. sun, rain, air temperature change, etc.) • Adjust the amount of run time during warm weather: Depending on the activities scheduled for the OVAL, we will reduce the compressor run time to be used more efficiently when the sun goes down andlar temperature drops. � Minimize the number of brine pumps operating during cold weather: We typically operate two or three brine pumps. As it grows colder, the refrigeration need diminishes as does the requirement to circulate large volumes of brine. We will be able to cut back to one brine pump more often to reduce electrical usage. Roseville Glows Program: A regional benefit, approximately $4,000 of energy costs are charged to the OVAL electrical meters. • Conduct Energy Audits Periodically: It has been the practice of the City to conduct periodic energy audits on facilities. Our plan would be to do this annually at a minimum and preferably twice per year. ATTACHMENT 10 Oval Onerational Efficiencies — from Staff