what is building management system ???

BUILDING MANAGEMENT SYSTEM

The building management system (BMS) is an overarching control

system that is responsible for the automatic regulation and control

of non-GMP facility subsystems, maintaining predefined parameters (or set points) and the control of their functionality. The major aim of the BMS is to guarantee the safety of facility operation, while also monitoring and optimizing the use and efficiency of its supervised subsystems to allow more efficient operation.

Building management system help building managers understand how buildings are operating and allow to control and adjust system to optimize their performance . as well as collating data and allowing ease of control, BMS help , visualize data automatically generate reports and create alarms and alerts when parameters are exceeded failures occur, or with prognostic systems ,when  failures are likely to occur. they can also allow comparison between spaces ,buildings and benchmark data.

Intelligent building management system brings together information and controls relating to a number of different systems operating using a range of different software applications and allow them to be controlled form single interface. This makes monitoring and analysis more straightforward and comprehensive and allows information from one system to influence the controls for another.

The effectiveness of BMS will depend on the range and quality of the information it receives from sensors and the programming of how this information is used. For example, information about external and internal conditions can be used to determine the level of heating required so that plat can be activated and a building preheated before occupants arrive.

Historically, BMS has been associated with large commercial, however as equipment has become easier to control, monitoring and detection has become less expensive, and wireless control system technology has become available, building of all sizes are having increasingly complex control systems installed. this can for example allow owners to connect to their home and switch on devices such as lights and heating before they arrive. See internet of and smart for more information.

 Building management systems may now be integrated with in operation or design and can help validate building information modelling to allow performance in to be compared with design criteria and design simulations. This can help identify potential problems in operation or design and can help validate modelling techniques. building information modelling might also include information about the operation and maintenance of components.

Examples of the major subsystems controlled by the BMS are

1. HVAC System. The duct temperature, pressure, and humidity, as well as exhaust temperature are connected to the BMS, and if their value exceeds defined limits, an alarm is generated.

2.Central Fume Collection, Laminar Flow Units, Dust Collection System, Central Vacuum System, Heat blowers. The BMS monitors the performance of these systems, allowing for early identification of units requiring maintenance. Sudden breakdown would signal via alarms and then appropriate action can be taken to protect the product.

3. Technical Steam System. Should, for instance, the pressure or temperature in the piping system fall below the defined regulatory values for clean steam, the BMS shall trigger an alarm, indicating a threat to product quality.

4. Hot Water System and Central Heating. Temperature and pump control monitoring via the BMS allows for a proper functioning of hot water distribution through the facility.

5. Chilled Water System. Control of the facility chillers could be supervised by BMS to monitor proper behavior of the system in terms of water/coolant temperature control or pump control to assure proper distribution within the distribution loop.

6. Sprinkler System (for fire safety).

7. Electrical Monitoring System. The BMS may monitor the consumed electrical power and the state of main electrical switches.

The number of subsystems connected to the BMS and the level of control is related to the investment decision. However, the two main subsystems, which are usually accounted for in a BMS are

(1) HVAC control  

(2) Electrical systems monitoring.