Patent ID: 8672537
Filing Date: 2014-03-18
Classification: F28F,F28G,G01N

Abstract:
1. Method for at least one of detecting and measuring of fouling in a heat exchanger, comprising: measuring a resistance value (R 1 , R 2 ) of a resistor (R) arranged on a all (P) of the exchanger at two different instants, and determining a value of the measurements as a function of the resistance values measured at the two instants wherein the resistor (R) is arranged along the wall (P) outside the exchanger and the resistor (R) is subjected in succession to first and second power levels (P 1 , P 2 ) that are each maintained for a certain duration, the duration of application (T 1 ) of the first power level (P 1 ) being smaller than the duration of application (T 2 ) of the second power level (P 2 ), the first power level (P 1 ) being lower than the second power level (P 2 ), and the measuring of the two resistance values (R 1 , R 2 ) are respectively carried out during application of the two power levels.