3results about "Heat exchange simulation" patented technology

A plate heat exchanger is disclosed in which several heat exchanger plates are held together in a pressure frame between a frame head equipped with media connections and a cover by means of a clamping device to form a plate stack. A flow chamber is formed between each adjacent plate by a circumferential seal. The flow chambers are alternately connected to two different pairs of media connections, so that adjacent flow chambers can be supplied with different heat exchange media. To enable monitoring of the seal condition, at least one pressure sensor is arranged on the frame head along a contour line of the circumferential seals, which measures the surface pressure acting on the circumferential seals in the plate stack.

This invention discloses an online fault diagnosis method for graphite heat exchangers, relating to the field of data processing technology. The method includes: performing data acquisition to establish a time-series monitoring dataset; dividing the time-series monitoring dataset into stages, creating a uniform sampling space; constructing a fitting dataset with constraints of minimum sample size and sampling space, and performing interior and exterior point discrimination; iteratively constructing the fitting dataset and obtaining a working fitting curve; establishing a calibration fitting curve, and establishing a basic deviation evaluation value based on the deviation evaluation between the calibration fitting curve and the working fitting curve; performing exterior point discrete analysis to establish additional deviation evaluation values; setting key coefficients for monitoring parameters in fault anomalies, calculating fault values, and performing fault early warning. This method solves the technical problem of difficulty in timely and accurate diagnosis of graphite heat exchanger faults in existing technologies, achieving online fault diagnosis of graphite heat exchangers and improving the accuracy and efficiency of fault diagnosis.

Shell-and-tube devices typically require regular maintenance. Described herein is an automated method for tracking the status of individual tubes during maintenance activities and recording status data for review and analysis. Status data may optionally be reported in real-time summary format and / or used to predict time-to-completion. The method helps to reduce the expense of performing maintenance activities in shell-and-tube devices, including shell-and-tube reactors and heat exchangers.