What Is Building Management System (BMS)

This article explain what is building management system.
Any kind of organization likes to get more efficient and effective benefits through the organization’s functions. Especially all organizations are tried to minimize the cost of the energy cost of labor and make the comfortable environment in the organization. The best solution for it, is Building Management system (BMS).
Building Management System (BMS) is to operate and take control of operations in the most efficient way possible for the occupiers/business, within the constraints of the installed plant.

The following terms are used interchangeably and refer to the same thing:

 Building Automation System (BAS)
 Building Management System (BMS)
 Building Energy Management System (BEMS)
 Facility Management System (FMS)


Building Management System

 Connects to various mechanical and electrical equipment in the building
 Automates some automatic control strategies such as automatically turning equipment on / off according to a time schedule
 Allows an operator sitting at a computer to view key information about the building
 Allows an operator sitting at a computer to control some of the equipment in the building
 Maintains an audit trail of what happened and when it happened
 Maintains historical data for selected information (i.e. room temperature)
 Alerts the operator when readings fall outside of normal range (i.e. breaker trips, temperature too warm, etc.)


Merits of BMS

 Automates some automatic control strategies such as automatically turning equipment on / off according to a time schedule
 Energy savings
 Allows an operator sitting at a computer to view key information about the building
 Improve building operations (understand what is going on in the building)
 Allows an operator sitting at a computer to control some of the equipment in the building
 Improve building operations (allow remote control / override when necessary)
 Maintains an audit trail of what happened and when it happened
 Improved building management (reporting / traceability)
 Maintains historical data for selected information (i.e. room temperature)
 Improved building management (reporting / traceability)
 Alerts the operator when readings fall outside of normal

 Improved building operations(faster reaction time to problems)

Typical BMS Hardware

There are four main components in a BMS. They are Sensors & Actuators, DDC Controllers, Supervisory Controllers, and Operator Workstations.

Type of actuator	Objective
Valve (motorized valve)	Modulating temperature, chill water
Damp (butterfly valve)	Modulating temperature, chill water

Sensors and Actuators

Type of sensor	It senses
Temperature	Water, Duct & Space Temperature
Pressure	Air & Water Pressure
Flow	Air & Water flow
RH	Relative Humidity
CO,CO2,	CO & CO2 level

DDC (Direct Digital Controllers)

DDC is a programmable controller which means the DDC program code may be customized for the intended use. The program features include the time schedules, set points, controllers, logic, timers, trend logs and alarms. In the system relevant units of controlling services have connected to the DDC through field devices..

Supervisory Controller

These features are performed in the Supervisory Controller.

• § Password
• § Alarm Handling
• § Scheduling
• § Historical Data
• § Totalization
• § Energy Management
• § Custom Control Sequences

Read More

1. What is Intelligent Building Management System
   
2. System Requirements to Install Intelligent Building System
3. Electrical Distribution System in the Intelligent Building System
4. Integration of Intelligent Building Management System With Vertical Transportation System
5. Integration of Lighting System to Intelligent Building Management System
6. Fire Detection and Protection System
7. Access Controller and Intruder Alarm System
8. Water Management System
9. Central Air Conditioning System