5results about "Analogue computers for distribution networks" patented technology

The invention discloses a novel mixed ventilation method for tunnel hydrogen energy fire accident safety rescue. The novel mixed ventilation method comprises the steps that a multi-shaft tunnel model with a mixed ventilation system is established; a novel mixed ventilation mode is provided based on the advantages and disadvantages of the existing ventilation mode; comparing the influence of different novel mixed ventilation modes on the length of the hydrogen jet fire back layer and the temperature in the tunnel; the invention provides a novel mixed ventilation method with a speed prediction model for tunnel hydrogen energy fire accidents. According to the method, a novel mixed ventilation mode suitable for handling hydrogen energy fire accidents in the tunnel is provided on the basis of different ventilation mode-ventilation speed-temperature distribution conditions, a dimensionless prediction model of the critical longitudinal ventilation speed is established, and the danger of hydrogen jet fire in the tunnel is reduced; rapid selection of the ventilation mode and rapid prediction of the ventilation speed when the hydrogen jet fire occurs in the tunnel are achieved, and the method makes up for the limitation of a traditional single ventilation mode on hydrogen energy fire prevention and control.

The invention relates to a method for monitoring the operation of a pump station (1), wherein the pump station (1) comprises a tank (6) for temporary storage of a liquid, an inlet (7) for influent liquid, an outlet (8), and at least one pump (2) configured for transporting the liquid away from the tank (6) via said outlet (8). The method is characterized by the steps of, monitoring the inflow of liquid to the tank (6) during at least a part of a predetermined time period (T) and determining Inflow data (IN) that is representative for the inflow of liquid during the predetermined time period (T), determining Pump Station Max Capacity data (PSMC) that is representative for the max capacity of the pump station (1) during the predetermined time period (T), for the predetermined time period, determining a momentary Pump Station Capacity Utilization (PSCUM) based on the determined values of Inflow data (IN) and Pump Station Max Capacity data (PSMC), using the overall formula PSCUM (%) = 100 * IN / PSMC, and determining a typical Pump Station Capacity Utilization (PSCUT) for the pump station (1) based on at least one momentary Pump Station Capacity Utilization (PSCUM) value.

The application discloses a new mixed ventilation method for tunnel hydrogen energy fire accident safety rescue, comprising: establishing a multi-verticle shaft tunnel model with a mixed ventilation system; based on the advantages and disadvantages of existing ventilation methods, a new mixed ventilation method is proposed; the influence of different new mixed ventilation methods on hydrogen jet fire back layer length and temperature in the tunnel is compared; a new mixed ventilation method with a speed prediction model for tunnel hydrogen energy fire accidents is proposed. Based on the different ventilation methods-ventilation speed-temperature distribution, the application proposes a new mixed ventilation method suitable for the tunnel to handle hydrogen energy fire accidents, establishes a dimensionless prediction model of the critical longitudinal ventilation speed, reduces the risk of hydrogen jet fire in the tunnel, realizes the quick selection of the ventilation method and the quick prediction of the ventilation speed when the hydrogen jet fire occurs in the tunnel, and the method makes up for the limitations of the traditional single ventilation method in preventing and controlling hydrogen energy fire.

The present invention relates to a method for monitoring the operation of a pumping station (1), wherein the pumping station (1) includes: a storage tank (6) for temporarily storing liquid; an inlet (7) for liquid inflow; an outlet (8); and at least one pump (2) configured to deliver liquid out of the storage tank (6) through the outlet (8). The method is characterized by the following steps: monitoring the inflow of liquid into the storage tank (6) for at least a portion of a predetermined time period (T) and determining inflow data (IN) representing the amount of liquid flowing into the storage tank (6) of the pumping station (1) during the predetermined time period (T); determining pumping station maximum capacity data (PSMC) representing the maximum capacity of liquid pumped from the storage tank of the pumping station (1) during the predetermined time period (T); and, for the predetermined time period, using the general formula PSCU based on the determined values ​​of the inflow data (IN) and the pumping station maximum capacity data (PSMC). M (%) = 100 * IN / PSMC to determine the instantaneous pump station capacity utilization rate (PSCU) M ); and based on at least one instantaneous pump station capacity utilization rate (PSCU) M The value is used to determine the typical pump station capacity utilization rate (PSCU) of pump station (1). T The typical pump station capacity utilization rate (PSCU) T This indicates the capacity utilization rate of the pumping station over a period of time.