Improving Building Comfort and Energy Savings by Advantech WebAccess

Project Introduction: 
During the energy crisis of the 1970’s there was a sea-change in the building industry when it paid more attention to the idea of conserving energy and introduced the terms Building Management System (BMS) and Building Automation System (BAS). Continuing rising energy prices and carbonreduction issues have also further spurred the development and deployment of BMS in recent years. However, the early systems were bulky, not user friendly, unreliable, and very expensive. With the advent of computerization, BMS analog signals became digitized so as to be communicated over long distance as well as facilitating the building management process these issues became less.
Due to the multiple many management functions and wide range of expertise, modern BMS is quite complex. Successful building management not only needs to link to a multitude of devices but also take account of the suitability of the software for the intended application. Equipped with a web browser-based software package for human-machine interfaces (HMI) and supervisory control and data acquisition (SCADA) which provides automated, centralized and unattended management with a high degree of electronic accuracy, the BMS can fully control the building’s mechanical and electrical equipments and thus effectively monitor energy consumption so that it provides a comfortable, safe and secure environment.

System Requirements:
Property management is facing various and complex challenges and reducing operating costs have become increasingly important for building owners. As a result, a growing number of new and refitted buildings are being designed to use less energy and focus on the building’s performance. A System Integrator was helping a builder implement advanced BMS for its newest construction project in a creative park in Asia. The construction, a 14-storey building with four underground floors, covers an area of nearly one hundred thousand square meters and contains three distinct sectors – shopping mall, hotel guest room floors and office floors. In order to provide optimal energy management, this BMS needed to be capable of monitoring and controlling a variety of facilities, including air conditioning, power system, plumbing system, fire system, ventilation, elevator, lighting, garden watering and so on. Meanwhile, using one system with an adequate number of nodes in a main control room to manage three different places was a key requirement but each place had to have their own dedicated system and can be controlled independently without mutual interference so as to saving the implementation costs. Due to the need to monitor many areas, there would be tens of thousands of detection points, and the new system also needed to offer remote control capabilities so that building managers or patrol staff can view the status of various facilities in real-time and deal with issues using handheld or mobile devices.

System Description:
As well as employing Advantech’s DDC controller and BAS-3000 series remote I/O modules to connect various devices on both the inside and outside of the building, and adopting a 12" industrial panel as an on-site HMI terminal for electromechanical cabinets, the kernel of this solution is HMI/SCADA Software. Advantech WebAccess is a multi-layer networking architecture system and its almost unlimited nodes allow users to link a large number of remote clients to a central server. Based on a unified energy management framework and the area of responsibility concept, the system is divided into three BAS subsystems (each with about 12,000 clients) to manage the shop, hotel and office areas. The building manager can supervise the operational conditions of subsystems from the control center while each of them can operate alone in normal times but support each other when necessary. The dynamic display provides a mechanism for refreshing the state of the graphs, real-time data, historical trends and alarm information. Through a standard web browser or mobile client, users can use tablet PC to view, control and configure the system remotely. To prevent unauthorized data changes, WebAccess supports various privileges torestrict display and data access so as to enhance system security. In addition, this SCADA system can automatically turn on or off the facilities to maintain the best operating conditions with the lowest cost in light of the user’s operating strategy. Conventional periodic maintenance and overhaul (every six months) would also change in accordance with the operating hours of the equipment. Proper maintenance practices can greatly save manpower and improve work efficiency. Alarm or fault notification can be supplied via several methods such as immediately displaying on screen or sending short messages, e-mails and reports to the manager. Therefore, the person in charge can quickly find out the failures so as to quickly troubleshoot the problems and make sure that the building is always operating efficiently.

Project Implementation:

Advantech WebAccess Browser-based HMI/SCADA Software
BAS-3520 Web-enabled DDC Controller
BAS-3018 8-ch UI Expansion Module
BAS-3024 4-ch UI, 4-ch AO, 4-ch DO Expansion Module
BAS-3050 8-ch DI, 8-ch DO Expansion Module
BAS-3051 16-ch DI Expansion Module
WebOP-2121V 12.1" SVGA Operator Panel with WebOP Designer Software

System Diagram:

Conclusions:
According to statistical information, operating costs can be reduced and savings of up to 30% can be made through effective use of BMS. Advantech WebAccess is a powerful, feature-rich but easy-to-use system, and its convenience not only helps property owners manage their buildings with optimal performance, but also enables System Integrators to easily deploy their BMS applications on networking infrastructures. With Advantech’s total solution, thiscomposite building has obtained green building certification and officially opened in the second half of 2013. The satisfactory results make our partner continue to work closely with us in order to introduce more energy-saving programs.