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What is BMS (Building Managment System)& is AHU / HVAC are
in BMS.
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Answer Posted / mohammed mujakar ( gulbarga, k
Dear Sathis,
First Look at Question i.e. What is BMS (Building Managment System)& is AHU / HVAC are in BMS. (not Burner Managment System)
BMS stands in diffrent form in diffrent feilds like BMS also stans for Buissiness Management System so on.
Ans:
Building Managment System is a Automated Controlled based system which instaled in Building/Shopping mall/ Buisness Centre etc. to Operate ,Controll and Monitore the
buildings Electrical and Mechanicle Equipment including Fire Alarm system, Access control, CCTV systems, Boilers trough monitoring system (Personel Comuter).
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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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