CONTROL SYSTEM BUILDING SERVICES

CONTROL SYSTEM BUILDING SERVICESDEFINATION CONTROL SYSTEMa control system is any group of components that maintains a desired result or values by manipulating the value of another variable in the system.

Building Services Control Systems for large building usually consists of a computerized system with a network of electronic equipment to monitor and control equipment mechanical, electrical, and lighting in buildings.It determines the position of each damper and valve in the system. It determines the operating fans, pumps and chillers at the prescribed speed or capacity. It determines the temperature in the building at the appropriate level; provide lighting on occupants; monitor system performance and hardware failures and provide information to the engineering staff.

THE NEED FOR CONTROLControl system in ensuring effective and efficient control of a building in order to;Provide comfortable and productive working conditions.Provide the proper environment for industrial processes.Operate in an energy efficient manner.Be environment friendly.Basic functions of the Control System

Control for SafetyControl for OperabilityControl for ProfitabilityControl for Enviroment

Control for Safety

protect equipment from damageto guard against high temperatures, low temperatures and fire hazards.eg; pressure controls, antifreeze devices, safety valves, limit switches and fusible link dampers.Control for Operability

produce economy of operation devices able to reduce amount of power, water and fuel consumption.eg: water control valves on refrigeration compressor.Control for Profitability

managed not to wasteoptimize the usage of raw materialeg; appropriate valve to control the fuel production, aircond compressor turn to off when the desired temperature has been achievedControl for Enviroment

A chemical plant might be thought of as a collection of tanks in which materials are heated, cooled and reacted, and of pipes through which they flow. Such a system will not, in general, naturally maintain itself in a state such that precisely the temperature required by a reaction is achieved, a pressure in excess of the safe limits.If not manage appropriately it will cause pollution.

Terminologies

Terminologies

Terminologies

Terminologies

Terminologies

Short Rest

Listening Music

Ear =detects low level of soundBrain =do analysis or comparison and determine which action to be performed to accomplish the desired level of soundBody =implement the control action

Driving

eyes =detects the positionBrain =compares the two positions and determines which actions to performed to accomplish desired resultBody =implement the control actionControl system for regulating the level of fluid in a tank

Exercise1. Give definition of Control System.2. What the meanings or examples that can be describe of the terminologies given below;disturbancesinputoutputfeedback