Electricite de France has been granted a patent for a method of managing a water pumping facility that uses a rotary filter to purify water from a natural environment. The method involves calculating the pressure loss caused by impurities clogging the filter based on data about the environment, filter dimensions, and local measurements. The variable rotation speed of the filter is then adjusted to maintain water supply. This method allows for better design of filters and anticipation of water supply risks. GlobalData’s report on Electricite de France gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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Data Insights Electricite de France SA - Company Profile

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According to GlobalData’s company profile on Electricite de France, Battery management systems was a key innovation area identified from patents. Electricite de France's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

Method for managing a facility pumping water with clogged filter

Source: United States Patent and Trademark Office (USPTO). Credit: Electricite de France SA

A recently granted patent (Publication Number: US11752456B2) describes a method for managing a facility that pumps water from a natural environment containing impurities. The facility uses a rotary filter to purify the water, but the filter can become partially clogged by the impurities. The method involves calculating the pressure loss caused by the clogging of the filter over time and adjusting the rotation speed of the filter based on the estimated pressure loss.

The method takes into account various factors such as data relating to the natural environment, dimensions of the rotary filter, and local measurements of water level and flow rate. The pressure loss is determined by the difference in water levels upstream and downstream of the filter, and the evolution of the pressure loss over time is calculated by tracking the water level downstream of the filter.

The flow rate of water through the filter is calculated based on the water level upstream of the filter. The method also considers the clogging level of the filter, which affects the flow rate. The clogging level is determined by a ratio that relates to the porosity of the filter and the current clogging level.

The patent also describes the use of a cross-wire sieve as the rotary filter and provides equations to calculate the Reynolds number and velocity of the water upstream of the filter. The method involves solving differential equations associated with the clogging level of the filter.

The patent further discusses the use of washing nozzles on the filter and divides the filter into three distinct portions with different clogging levels. The dimensions of the filter are chosen based on the flow rate requirements and anticipation of clogging.

The patent includes claims for a device comprising a processing circuit configured to implement the method and a non-transitory computer-readable medium storing instructions for a computer program to execute the method.

Overall, this patent presents a method for managing a facility that pumps and purifies water from a natural environment, taking into account factors such as clogging levels, flow rates, and filter dimensions. The method aims to optimize the performance of the rotary filter by adjusting its rotation speed based on the estimated pressure loss.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.