Control Freaks
By Tom Hartman, PE
A fundamental problem with building controls today is the use of PID (proportional/integral/derivative) control as a primary means for regulating the operation of building-system components. PID control was never well-suited for HVAC control. Now that we have robust digital control systems, it is imperative that we make a change because comfort, efficiency, and control stability are all adversely affected by the continued widespread application of PID control to HVAC systems.
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Control Points
By Terry Alboucq and Edward Krause
Take an inside look at the "Smartest Building in America," Providence St. Peter Hospital, a 290-bed, not-for-profit regional teaching hospital in Olympia, Wash. "We are challenged to provide a comfortable environment for our building's occupants while ensuring that not one energy dollar is wasted. To accomplish this goal requires a smart building," said Geoff Glass, facility manager of the building named the smartest in America for 2011 by Siemens Industry Inc.
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Facility- and property-management firm Jones Lang LaSalle has launched an integrated building-management solution that combines cloud-based, smart-building technology with a team of engineering and operations professionals to enable real-time remote monitoring and control of its facilities and portfolios worldwide.
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Marriott International has announced plans to develop more than 23 megawatts of load-response capability across more than 250 Marriott-managed hotel properties in the mid-Atlantic, New England, New York, Texas, and California. Marriott signed an agreement with Constellation Energy to use Constellation’s load-response program to improve energy efficiency and reduce electricity costs at Marriott properties while ensuring guest comfort through expanded building-automation capability and customized load-curtailment strategies.
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Control Specs
The EC-NetAX EnerVue Web-based energy-management dashboard provides visualization of vital building metrics through an easy-to-use, browser-based dashboard application.
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The AspectFT-Nexus area controller is designed to integrate and manage a wide array of HVAC, energy, and critical building systems while giving the user the power and convenience of modern Web technologies.
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The new FAAST fire-alarm aspiration-sensing 8100 detector features an onboard ethernet port that eliminates the need to create a separate data network to identify the location of an initiating device.
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