MRI – Research Group Meeting Intelligent Building Research – Indoor Air Quality Applications Using Wireless Sensors and Building Automation System December 1, 2005 Chia Y. Han

Intelligent Building Research

Key Issue # 1 – Interoperability across enterprise and industry

Key Issue #2 – Open System Architecture

HVAC – Infrastructure for Indoor Air Operations

Setpoints – Meters/Sensors and Control Points

BACnet Objects Maint & Mat. Mgt. CMMS System Object Frequency Drive Object PID Control Control Device Supply Fan Variable VFD Ref Set Point VAV Air Handler Object Fire & Smoke Alarm System Object VAV Cooling Only Terminal Box Dmpr Actuator Flow Sensor VAV Cooling Only Terminal Objects Thermostat Objects Ovrd PB Setpt Adj RH Sensor Temp Sensor Maint & Mat. Mgt. CMMS System Object Sup Air Control Loop Fan Static Press Sensor Sup Air Flow Sensor Ret Air Flow Sensor OA Flow Sensor CO2 Sensor System User Objects Power Management System Object Return Fan Variable VFD Load Ctrl Object

IBS – IAQ Application To develop a BAS system for IAQ applications that is based on open system principles, domain standards and recommended practices, rule-based expert system, and Web technologies. The system should provide capabilities for FDD with user-defined, case-specific rules.

Case Study - Air Isolation btw 2 rooms

IBS - Architecture

Web-Based IBS Implementation

Diagnosis Logic in Expert System Language Diagnosis Request in XML

Sample Views of the BAS Technology

Siemens Building Technologies, Inc. http://www.us.sbt.siemens.com/bau/products/Wireless/149944.pdf Technical Specification Sheet Rev. AA, October 2005

To implement the WFLN, a Field Level Network Radio Transceiver (FLNX) is mounted at the FLN device and a Field Panel Radio Transceiver (FPX) is mounted at the field panel. Both must be powered by 24 Vac. The radio’s antenna can either be direct or remote mounted. In cases where the radio transceiver is mounted in a metal enclosure, the remote mount antenna would be used. The transceivers are plenum rated for direct mount without an enclosure. Once installed and powered, the radios automatically form the mesh network and the WFLN’s wireless mesh communication is virtually transparent to the system and end user.

Summary of IBS BACnet standard gaining acceptance worldwide Interoperability effort is underway in building industries Almost all major BAS vendors are now subscribing BACnet Wireless-based sensors and controllers are starting to become available Very few enterprise business process/workflow is incorporating BAS Lack of easy-to-use, user-directed IBS