Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system
Patent
1997-07-14
1999-12-21
Grant, William
Data processing: generic control systems or specific application
Specific application, apparatus or process
Mechanical control system
700278, G05B 1300
Patent
active
060061421
ABSTRACT:
The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. Digital controller technology is included and operates in accordance with a state transition diagram clarifying conditions that must exist for the environmental controller to switch from one mode of operation to another (e.g., from a cooling mode with dampers set at the minimum position to a cooling mode with the dampers modulating to reduce the energy used for mechanical cooling). Several controllers, or a single controller operating on several sets of control parameters, sequentially operate in accordance with transition data and system performance characteristics for controlling system operation.
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J.E. Seem et al., "A New Sequencing Control Strategy for Air-Handling Units" International Journal of Heating, Ventilation, Air Conditioning and Refrigeration Research, ASHRAE, Jan., 1999.
Bernaden, III Alex
Decious Gaylon M.
Lomonaco Carol
Seem John E.
Garland Steven R.
Grant William
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