Jun 3, 2011 3:59 PM, By Dan Daley
InfoComm Energy Management Standards in Action
Calculating the Savings
The actual assessment of the ROI was accomplished by measuring the energy draw, in watts, on the system when it was in a fully on state, then measuring the differences in power draw as each component would go into standby mode and finally into a fully off state. In addition, the calculations also took into account predictable periodic activity breaks during the court day schedule during which the equipment would have otherwise stayed on. They then applied local electrical rate costs to create a final ROI calculation (See Figure 2). The results were vivid; for instance, the power consumption savings using the auto standby mode for the projector in a single courtroom cut usage by 1,976 hours a year for a cost savings of nearly $1,900 annually. Other findings included the fact that displays represent 63.5 percent of overall power consumption savings, and that the uninterruptible power supply (UPS) is the highest power consuming component in the system and the least used.
“These were conclusions that we had previously estimated that we could achieve, but this was a way to prove that the standards committee’s assumptions would come to fruition,” Maione says, adding that feedback from this exercise will contribute both to the furthering of the Green AV Systems Energy Management Task Force’s aims and stimulate dialogue with manufacturers about adding more sophisticated auto sleep and shutdown modes to their products. “This was real life. This was the way to get it out of the ivory tower and into practice, in an actual working courtroom, to prove that green AV makes actual fiscal sense, especially at a time when states and counties are having financial issues. Green AV makes a difference.”
In addition to the ROI validation, the integrator also experienced his own green epiphany. ICS’s Jason Meyer says he’s become more aware of the economic benefits to clients of green designs and installations. “Yes, definitely, we’ve been trying to work more green angles into our designs and proposals. A recent project had motion sensors added for similar auto shutdown features, but the problem is that the AV integrator is usually brought into the project so late in the game that it’s hard to implement a lot of these ideas,” he says. “That’s a big issue. It would really make a big difference if we were able to bring these ideas in at the point where the electrical contractors are coming onto the project.”
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