MRI – Research Group Meeting Intelligent Building Research – Indoor Air Quality Applications...

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

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

Control Device

FlowSensor

VAV Cooling Only Terminal Objects

Thermostat Objects

Ovrd PB

Setpt Adj

RH Sensor

Temp Sensor

Maint & Mat. Mgt. CMMS System Object

VAV Air Handler Object

Sup Air Control Loop

Control Device

Fan Static Press

Sensor

Sup Air Flow

Sensor

Ret Air Flow

Sensor

OA Flow Sensor

CO2 Sensor

System User Objects

Power Management System Object

Frequency Drive Object

PID Control

Control Device

Return Fan Variable VFD

Ref Set Point

Load Ctrl Object

Load Ctrl Object

BACnet Objects

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 roomsCase Study - Air Isolation btw 2 rooms

IBS - Architecture

Web-Based IBS Implementation

Diagnosis Request in XML

Diagnosis Logic in Expert System Language

Sample Views of the BAS Technology

Technical Specification Sheet Rev. AA, October 2005

Siemens Building Technologies, Inc.

http://www.us.sbt.siemens.com/bau/products/Wireless/149944.pdf

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