Abstract: An estimation device includes a controller that: acquires a first pipe surface temperature and a second pipe surface temperature, wherein the first pipe surface temperature is an outer surface temperature of a pipe at a precipitate generation position at which a precipitate is adhered to an inner surface of the pipe through which a fluid flows, and the second pipe surface temperature is the outer surface temperature of the pipe at a reference position different from the precipitate generation position; calculates an in-pipe fluid temperature that is a temperature of the fluid at the precipitate generation position based on the second pipe surface temperature; and estimates a thickness of the precipitate based on the in-pipe fluid temperature and the first pipe surface temperature.

Abstract: An estimation device includes a controller that: obtains first-type temperature data for a position corresponding to an outside of a first-type position of a pipe in which a fluid flows; obtains second-type temperature data for a position corresponding to an outside of a second-type position of the pipe at which condition related to heat transfer is different than condition at the first-type position; based on the first-type temperature data and the second-type temperature data, calculates thermal resistance of a deposit formed on an inner surface of the pipe, and estimates a thickness of the deposit.

Abstract: An estimation system includes an acquirer, an inferrer, a corrector, and an estimator. The acquirer acquires a measured value of an outer surface temperature of a pipe through which fluid flows. The inferrer infers an execution time for a removal process for deposits on an inner surface of the pipe. The corrector corrects an estimated value used for estimating a thickness of the deposits, by using the measured value of the outer surface temperature of the pipe, which is acquired within a predetermined time from an inference result of the execution time for the removal process for the deposits. The estimator estimates the thickness of the deposits based on the corrected estimated value and the measured value of the outer surface temperature of the pipe.

Abstract: An estimation system includes an acquirer configured to acquire a measured value of an outer surface temperature of a pipe through which fluid flows, an inferrer configured to infer an execution time for a removal process for deposits on an inner surface of the pipe, corrector configured to correct an estimated value used for estimating a thickness of the deposits, by using the measured value of the outer surface temperature of the pipe, which is acquired within a predetermined time from an inference result of the execution time for the removal process for the deposits, and an estimator configured to estimate the thickness of the deposits based on the corrected estimated value and the measured value of the outer surface temperature of the pipe.

Abstract: A scale thickness estimating system according an embodiment includes: a fluid temperature acquiring unit that acquires a temperature of a fluid flowing in a pipe; a flow path outer surface-temperature acquiring unit that acquires a temperature of an outer surface of the pipe; a heat flux acquiring unit that acquires a heat flux on the outer surface of the pipe; a flow path wall-thermal conductivity acquiring unit that acquires a flow path wall thermal conductivity of the pipe; a scale thermal conductivity acquiring unit that acquires a scale thermal conductivity of scale depositing on an inner surface of the pipe; and a scale thickness estimating unit that estimates a thickness of the scale based on the temperature of the fluid, the temperature of the outer surface, the heat flux, the flow path wall thermal conductivity, and the scale thermal conductivity.