Heating systems – Automatic control – Water
Patent
1991-04-26
1992-06-30
Bennet, Henry A.
Heating systems
Automatic control
Water
236 91E, F24D 300
Patent
active
051255723
ABSTRACT:
A hot water heat control system for a building having a given boundary layer heat loss characteristic is described. The heating system, which includes a water heating device, a water circulation loop, and a mechanism for varying the amount of heat to the loop, is controlled by a unique valve arrangement. In the best mode, the valve arrangement controls the water temperature supplied to the perimeter heater in response sensed changes of ambient environmental conditions. In one system configuration, a controller is used to control the flow of heated circulating water in response to the sensed weather parameters. The valve controller has a flow timer for variably establishing flow periodicity between a minimum flow time and a maximum flow time. The valve controller also has a base cycle timer for variably establishing base cycle periodicity between a minimum base time and a maximum base time. In this form of the system, a selector is provided, responsive to the building heat equipment, for selecting flow time and base cycle time. A valve operator operates in response to the valve controller and opens and closes the water control valve. The system includes zone monitoring for sensing a zone condition variable selected from wind effect, solar radiation effect, other boundary layer disturbances and the combined effect of two or more thereof. Thus, hot water perimeter heating with zone condition variable compensation, is provided without using internal building temperature as a parameter.
REFERENCES:
patent: 4393662 (1983-07-01), Dirth
patent: 4582982 (1986-04-01), Pelgari
patent: 4718021 (1988-01-01), Timblin
Bennet Henry A.
General Electric Engineering, Inc.
Silber Siegmar
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