Heat exchanger performance monitor

Details Heat exchanger performance monitor Heat exchanger performance monitor

G - Physics

01

N

354/23

G01N 25/18 (2006.01) F22B 37/56 (2006.01) F25B 49/00 (2006.01) F28F 19/00 (2006.01) F28F 27/00 (2006.01) G01L 3/26 (2006.01)

Patent

CA 1220274

ABSTRACT OF THE DISCLOSURE A performance monitor generates a fouling factor which indicates the level of fouling of a heat exchanger having a heat exchange surface area and through which a heat exchange medium passes having a known specific heat. Temperature transmitters are utilized to obtain values for the input and output temperature of the heat exchange medium as well as the temperature in the heat exchanger of a heat exchange fluid used to transfer heat to or from the heat exchange medium. Modules are used to generate a value for an actual heat transfer coefficient in the heat exchanger as a function of the temperatures, flow rate and constant parameters such as area and specific heat, for the heat exchanger. The actual heat transfer coefficient is compared with a nominal or original heat transfer coefficient to determine if any deterioration in the coefficients which reflects the fouling of the heat exchanger. A simple ratio of the nominal to actual heat transfer coefficent is taken as a measure of this fouling factor. -16-

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