Distributed control system for thermal snow melt and freeze protection systems
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United States of America Patent
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Feb 23, 2021
Grant Date -
N/A
app pub date -
May 23, 2019
filing date -
May 25, 2018
priority date (Note) -
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Abstract
A snow and ice melt system having one or more zones, each including one or more heaters, and having one or more controllers configured to use a power output of each heater and an average temperature of each zone to determine operational control of each heater to achieve a specified result. Hydronic or resistive heaters could be used. The controllers may be configured to use a system temperature response over time to determine if a phase change of the snow or ice is occurring. The phase change might indicate that snow or ice is present on a zone and is melting. Use of a first derivative of the system temperature response over time might determine a percentage of a zone covered by snow or ice. Use of a second derivative of the system temperature response over time might determine whether melting is complete.
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