Patent ID: 7454308

Claim:
A system for detecting waterlogging in a steam coil heating system, wherein said steam heating coil system is comprised of a steam inlet header, a steam-condensate outlet header, and a series of parallel steam coils, each of said steam coils in fluid communication with said inlet header and said outlet header, said waterlogging detection system comprising: a plurality of temperature sensors, each of said temperature sensors located to measure a selected heating coil; temperature data recording means in communication with said plurality of temperature sensors for receiving temperature data from said temperature sensors and recording said temperature data at selected time intervals for display and evaluation; display means in communication with said temperature data recording means for displaying said temperature data for each of said plurality of temperature sensors; comparison means for determining the difference in the average temperatures recorded by said temperature data recording means between each of said plurality of temperature sensors; and, indication means for indicating a waterlogged condition, wherein a waterlogged condition is indicated when the average temperature of one or more of said plurality of temperature sensors closest in proximity to said discharge header remains significantly lower over a selected time interval than the average temperature of one or more of said plurality of temperature sensors more distal from said discharge header.