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Building attributes that contribute to the need for a longer prediction horizon when controlling HVAC systems include large open rooms, high thermal mass, and spaces with rapid changes in occupancy levels. [1] For commercial HVAC OCC, predictive algorithms will be informed by the six information grades (IGs) outlined by ASHRAE.
These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
Building systems and equipment (HVAC, electrical, etc.) operate via the control systems (BAS, BMS, and similar) based on a designed sequence of operations (SOO) typically developed by the design engineer (specification) and modified during the submittal process by the trade contractors (and reviewed and approved by the design engineer).
Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
The mechanical component of MEP is an important superset of HVAC services. Thus, it incorporates the control of environmental factors (psychrometrics), either for human comfort or for the operation of machines. Heating, cooling, ventilation and exhaustion are all key areas to consider in the mechanical planning of a building. [4]
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