Desktop and Notebook Computer Purchases
Bentley purchases approximately 2,500 desktop and notebook computers each year. Approximately 2,100 of these are notebook computers distributed to students in the Undergraduate Mobile Computer Program. Bentley requires that computers and computer monitors meet the latest Energy Star and Electronic Product Environmental Assessment Tool (EPEAT) ratings to maximize the efficiency of computers used on campus.
Several years ago, Bentley transitioned away from mini-tower Personal Computers (PCs) and cathode ray tubes (CRT) computer monitors to more environmentally friendly small desktop PCs and liquid crystal display (LCD) monitors. The small desktop computers are made of less material and require lower wattage than the mini-towers they replaced. Ultra small desktop computers, which consume even less power, have replaced mini-towers in most lab areas. LCD monitors consume approximately one-quarter of the energy of the older CRT monitors and are made from more environmentally friendly components. Bentley’s current standard desktop computers and monitors conform to Energy Star 4.0 and are EPEAT Gold certified. Notebook computers conform to Energy Star 4.0 and EPEAT Silver standards.
Computing Classrooms, Specialty Laboratories, and the Baker Library
All desktop computers in the computing classrooms, specialty laboratories and the Baker Library are programmed to automatically shut down when the buildings close at night.
All Bentley University classrooms are equipped with computers, AV equipment and AMX control systems. All classroom systems are automatically shut down by the centrally managed AMX system one hour after classes end each night to ensure that systems are not left on throughout the night.
Approximately 122 library computers were replaced during the summer of 2009. The new Energy Star Ultra Small Form Factor PCs consume 40 – 50 watts during operation, a significant reduction from the 110 – 130 watts of the existing PCs. Total annual energy savings will equal approximately 45,750 kWh based on 5,000 hours of library operation.
Desktop and Notebook Computer Energy Management
Considering energy use associated with the operation of PCs on campus is as important as purchasing energy efficient models. Default settings for energy management have been analyzed for the notebook PCs. For notebook deployments beginning in the 2009/2010 academic year, default energy settings will be optimized to reduce unnecessary energy consumption when notebooks are idle. Notebook settings are documented in the following table.
Notebooks in the sleep state reduce energy consumption to the neighborhood of one watt. Hibernation brings energy consumption down to zero with the tradeoff of a significantly longer time to resume operation than that of sleep mode.
Contact Client Services for more information about your computer's sleep and hibernation settings for energy optimization.