STELLENBOSCH UNIVERSITY BUILDING MANAGEMENT SYSTEM CASE STUDY
BMS HISTORY § 1989 - Johnson Controls JC8520 system installed – Main Campus. § 1990’s - Johnson Controls Metasys implemented in phases. § Communication system uses IT backbone with Fibre Optic to RS-485 communication underground. § System expands to include many buildings. Approximately 2000 points over 15 Buildings.
BMS HISTORY § 1993 – Medical School added to BMS System. § Further 2000 Points added to system.
BMS HISTORY § 2011 – System upgraded to latest Metasys system § Field controllers remain – Johnson DX9100 – application engines installed. § Central Server implemented on single workstation. § 2017 – Audit of BMS operation. § Evident system was not functional. § Server not visible, Application engines not accessible. § Mechanical Service personnel overriding field controllers & disconnecting cables to keep clients happy. § Plants and units left in manual – power consumption increases due to no control.
SOLUTION § The solution is to provide a system that would communicate with the legacy Johnson Controls while at the same time allowing for future expansion and communication with new devices and 3rd party devices. § Tridium was selected as this platform provides for the communication to the proprietary Johnson Controls N2 network bus, as well as provide open source drivers such as Bacnet, Lonworks, Modbus, OPC, SNMP so that the hardware selected can also communicate to 3rd party devices such as UPS’s, Generators, electrical & water meters via M-Bus.
SOLUTION § Each Johnson Controls network application engine was replaced with a Tridium JACE. § A Tridium server installed on a Virtual Server provided by Stellenbosch IT department. § All users access the BMS via standard browsers with no additional software required - Tridium is fully HTML5 compliant. Multi-Platform support for OS’s & browsers
RESULTS (so far…..) § New system went live in 2017/2018 § Live data proved many plants and points in manual and overridden. NO CONTROL § Control service and re-configuring to design intent of systems being performed and ongoing. § Results……………. § Systems perform as intended. § Mechanical Service Staff have full control over all equipment. § Plants operate correctly and are scheduled correctly for occupation times. § Clients now content as systems operating. § And……………………POWER CONSUMPTION REDUCED.
RESULTS (so far…..) § Facilities Management identified the Arts Building (Lettere & Wyse) as a large power consumer. § High Base Load. § Interventions executed… § New field communication – ensure control devices operate from BMS. § Verification of actual control – ensure efficient control operation. § Verification of plant activation (Schedules) – ensure de-activation of plants.
RESULTS (so far…..) Night Load 7-03-2018 to 7-04-2018 Night Load 7-04-2018 to 7-05-2018 Average Night Load – 300KVA Average Night Load – 150KVA Reduce night load of 150KVA Approximately R85000 saving per month
Future Open base Platform installed – further expansion and integration of 3 rd Party systems § can be realised. § Further buildings will now be completely serviced and re-configured with further reduction in energy usage. § Ensure regular maintenance is achieved to maintain Status Quo. § Integration to other services, such a grey water systems, borehole systems, etc can be realised with minimal costs involved. Leverage IoT devices and the 4 th Industrial Revolution into the system. § § Implement Analytics.
US BMS System § Arts Building Chiller Plant.
US BMS History and Schedules § Arts Building Chiller Plant.
US BMS Engineering. § Industrial Engineering Building.
US BMS Room Control § Industrial Engineering Building.
THANK YOU TM Connecting minds and machines
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