BMS Overview

BMS stands for Building Energy Management System and using its various elements, controls a buildings heating, ventilation, lighting and can monitor energy usage.

The heating, ventilation and air-conditioning within a building usually accounts for 40% of a buildings energy usage. If we then include a buildings lighting we get nearer to 70%. By installing a correctly configured BMS to control all these aspects we can control and reduce the energy usage of the building.

We breakdown the elements of a BMS into the following:

  • Management Level
  • System Controller
  • Field Device

The Management level is typically a PC driven piece of software that will give a graphical interface of the buildings HVAC and lighting plant. This allows a user to monitor and make adjustments to how the building is operating. These used to be/are based on 1 PC per site in an office within a building, however with todays technology there are various other ways of accessing these systems from any location worldwide using tablets, mobile phones and laptop computers.

The system controller (outstation) is a device which is the brains of the operation. This is used to connect to both the plant which is to be controlled, and the field devices are to monitor. We then engineer a bespoke control software strategy which runs within the device and operates the connected devices in the most energy efficient way with the needs of the building end user in mind.

Field Devices are comprised of many elements (temperature sensors, occupancy detectors, LUX sensors, pressure sensors, etc) and are the interfaces between the environment, the plant and the controller. These field devices are all networked together to control a buildings usage in the most energy efficient way possible.