Heat exchangers in operation often experience scaling, which can lead to a decrease heat exchange efficiency and even safety accidents when fouling accumulates certain thickness. To address this issue, manual intervention is currently employed monitor thickness advance. In study, we propose two-layer LSTM neural network model with an attention mechanism effectively learn data under different wo...

Original scientific paper High energetic water jets sprayed from nozzles are used for scale removal. Special nozzles with flat and very narrow jets for high feed pressure are used. This process, called descaling, is used in hot rolling, for example. A number of jets must be used to cover the total width of a rolled strip. High quality and homogeneity of the descaling process is required. A row ...

Traffic model based on the fractional Brownian motion (fBm) contains three parameters: the mean rate , variance parameter and the Hurst parameter . The estimation of these parameters by the maximum likelihood (ML) method is studied. Explicit expressions for the ML estimates and  in terms of are given, as well as the expression for the log-likelihood function from which the estimate  is obtain...

Heat exchangers are widely used in power engineering and industrial applications, many techniques such as coiled tube, surface tension devices, rough surfaces, extended surfaces have been investigated to enhancethermal performance and to minimize the cost and size of the heat exchanger equipment. One of the most important techniques is tube insert. In general,tube inserts can be classified into...

Sichuan is gradually being transformed and utilizing groundwater thermal resources. However, this investigation found that the high mineralization rate of geothermal resources in Basin common efficient, environmentally friendly descaling technology key to promoting utilization low-yield oil gas wells. Due efficiency, low cost, lack pollution high-pressure jet descaling, it has attracted more at...

High-frequency electronic descaling devices are physical water treatment methods that use a high-frequency electromagnetic field to prevent and remove scale. The effectiveness of the method is verified by monitoring growth scale on surface heat exchange tubes. microstructure obtained from experiments analyzed scanning electron microscope (SEM), action characteristics fields explored observing c...