PGE Wireless Pneumatic Thermostat ET Final Report.pdf

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PG&E’s Emerging Technologies Program ET11PGE3171 OAKLAND SHINES The Oakland Shines program is designed to reduce energy use and make advanced energy technologies available for downtown Oakland businesses. The program offers free energy assessments, and focuses on the following technologies: LED task lighting for office and retail settings Task lighting that reduces the need for overhead lighting Occupancy-sensing stairwell and garage lighting Wireless controls for heating, ventilating and air conditioning systems. HVAC technologies are incentivized at rates ranging from $0.19 to $0.89/kWh. Funding is provided by an ARRA grant through the CEC’s Energy Upgrade California initiative. The program is administered by Quantum Energy Services & Technologies, Inc. (QuEST) (http://www.quest-world.com/), an energy efficiency engineering and program management firm based in Berkeley, CA. The Oakland Shines point contact is Brendan Havenar-Daughton. Additional information can be found on the following website: http://oaklandshines.com/index.php . 6
PG&E’s Emerging Technologies Program ET11PGE3171 EMERGING TECHNOLOGY/PRODUCT Wireless pneumatic thermostats (WPTs) are direct replacements of wall mounted pneumatic thermostat devices, which provide additional functionality through electronic control and wireless communication capabilities to and from central control systems. Figure 2: WPT Units from Different Manufacturers The WPT unit is a small enclosure box (see Figure above) that replaces a standard pneumatic wall thermostat. The WPT contains a temperature sensor, a pneumatic control mechanism, pneumatic ports (on the back of the device), wireless communications, and a battery. A display can show the current temperature or temperature setpoint. Control buttons may allow the user to adjust settings such as the temperature setpoint. In addition to the WPT units themselves, powered wireless relay devices (repeaters) must be installed in the building to carry data and control parameters back to a central WPT hub controller. The WPTs communicate using the relay devices on a relatively long time interval, typically every 15 minutes, to conserve WPT battery life. The relay devices form a wireless mesh network communicating to the WPT central hub controller. Most measures can be implemented using the WPT central hub controller, but integration may also required between the WPT controller and a central BMS. See the following figure illustrating WPT system architecture from one of the manufacturers. 7
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