Green AV that Works - AvNetwork.com

Green AV that Works

Author:
Publish date:

Bryant University ties AV Systems to Crestron Occupancy Sensors

Image placeholder title


Ceiling-mounted Crestron GLS-ODT-C-500 occupancy sensors alert the Crestron MP2E or PRO2 control system to shut the AV system down after 30 minutes of no motion.

Here’s a “green AV” tip that works. Tie motion sensors into your AV system controls, so that your systems shut down if no one moves in a classroom or conference room for 30 minutes.

That’s a strategy followed by Jason Gregg, media services analyst at Bryant University in Smithfield, RI.

“We knew that end users had been leaving the AV systems on in nearly half the classrooms for two hours or longer each day, and we set out to cut that time dramatically. Still, we had to prove that the money spent on the sensors was worth the cost. We put power recorders on a test system and recorded the amount of power used, as well as how often it was left on with no one in the room. With this test, we figured out that the sensors would pay for themselves in only one year.”

In 2007, Bryant began a green initiative, which, so far, has been able to reduce the amount of energy used on campus by over 35 percent—a savings of more than $20,000 per year. Gregg and the IT staff hoped to extend those savings through greater efficiencies in the AV systems.

“We’re constantly trying to figure out ways to make our systems as power friendly as possible,” he explained. Just over a year ago, Gregg began experimenting with Crestron occupancy sensors, adding them to five classrooms during the spring term. “They seemed to work very well. We had no complaints from users that the systems were shutting off early, and we confirmed that they shut off as programmed. So next we deployed 20 more rooms.”

At the same time, Gregg installed Crestron RoomView remote management software, adding asset management, anti-theft, and helpdesk functions to each upgraded classroom.

“The idea came from Mike Bohan at HB Communications,” Gregg explained, “but we’ve been able to do most of the work ourselves.” D epending on the size of the room, IT technicians ceilingmount a Crestron GLS-ODT -C-500 or GLS-ODT -C-1000 occupancy sensor, and Gregg programs the Crestron MP2E or PRO2 control system to shut the AV system down after 30 minutes of no motion. “We have also set the NEC projector in each room to shut down after 10 minutes of no signal and, as a failsafe, RoomView sends a System Off signal at 10:30 p.m. each day.”

To fully implement the system, staff must add a controllable power supply to each rack. When a user pushes the System Off button, or the sensor sends a System Off signal, the system shuts off the projector, raises the screen, and, via the controllable power supply, shuts down the power to selected components in the equipment rack.

“The biggest power hogs are the projectors, so we shut them off right away,” Gregg explained. He also sets the system to shut down flat-panel displays, amplifiers, DVD -VCRs, and document cameras. “The Crestron processors stay on, so we can see the system in RoomView, but they don’t take much power in standby mode.” Gregg said they only have four or five audio processors on campus, and so far they are keeping them on, as they would need to sequence them on a little earlier than the rest of the system in order to load all their settings properly. They also leave their video conferencing codecs on.

By the end of August 2011, more than 100 AV systems on campus had been upgraded. “We still have a couple of stragglers, but only because they don’t have control systems,” he explained. “We will put those in soon.”

Related

Image placeholder title

Aloha AV

HONOLULU, HI—Built in the golden age of elaborate movie palaces, Honolulu’s Hawaii Theatre is an exquisite example of the gilded glamour that characterized its era.

Image placeholder title

AV Merit Badge

FORT SNELLING, MN—Technicians for Alpha Video and Audio found installing modern audio and video systems in a building built in 1907 as a place for the Army to train cavalry horses not only a challenging experience, but also a rewarding one since the project was for the Boy Scouts of America.

02_SS_BellWorks_Interior

AV, Wayfinding Guide Bell Works' Rebirth

The breeding ground of landmark scientific breakthroughs in the latter half of the 20th century, the Bell Works campus in Holmdel, NJ is symbolic of man’s desire to organize and master the world around him. Now, as it is reborn as a hub of high-tech innovation, its owners are integrating cutting-edge technology befitting its exceptional heritage to enhance its usefulness for the next generation.

Image placeholder title

Classical Goes Modern at This University Concert Hall AV Install

The Donald and Maureen Green Music Center is a world-class performing arts complex in the heart of Northern California’s renowned wine country, located on the campus of Sonoma State University. When looking to install a new sound reinforcement system, the University’s challenge was to find a solution that would enable the hall to host both classical and non-classical artists.

Image placeholder title

WWI Museum Simplifies its AV System

Recreating the events of World War I—soldiers packed into trenches along the mangled battlefield; tanks, being used for the first time, flattening villages they passed through; women, taking on new roles and offering aid to the wounded on the frontlines, or at home by working in factories—is an important task that requires specific attention to detail, accompanied by reliable technologies.