What is BMS (Building Managment System)& is AHU / HVAC are
in BMS.
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Answer Posted / ram kumar
BMS was mainly for less the manpower and save the time.The
router in bms was attached with PC and all the controllers
in all the AHU room's.If the control given from bms room
by PC means the AHU was switched ON.And we control the ahu
cooling system via BMS.BMS mnz Bulding Management
System.Via BMS we check the floor temp by the help of
sensor and check the ups readings,dg readings etc......
by the help of controllers in DDC Panel.
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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
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