35results about How to "Reduce potential impact" patented technology

In a fuel cell system of the invention, a pressure regulator is provided in the pathway of a hydrogen supply conduit that connects a hydrogen tank to a fuel cell stack. An anode off gas discharged from the fuel cell stack is recirculated through a recirculation pipe into the hydrogen supply conduit. A hydrogen pump is provided in the pathway of the recirculation pipe to increase the pressure of the anode off gas. A control unit of the fuel cell system includes a hydrogen pump control module, an abnormality diagnosis module, and an atmospheric pressure-based correction module. The hydrogen pump control module regulates the rotation speed of the hydrogen pump corresponding to a power demand to be output from the fuel cell system. The abnormality diagnosis module detects an abnormal state, based on a result of determination of whether the pressure of the hydrogen supply measured by a pressure sensor is within a certain range defined by two preset threshold values. The atmospheric pressure-based correction module corrects the rotation speed of the hydrogen pump and the threshold values used for abnormality diagnosis according to the atmospheric pressure measured by an atmospheric pressure sensor. Even in the state of unstable output of the pressure regulator with a variation of the atmospheric pressure, such correction compensates for the varying flow rate of the hydrogen supply to the fuel cell stack and thus effectively prevents misjudgment of abnormality diagnosis. Namely the technique of the invention reduces the potential effect of the varying pressure of the hydrogen supply to the fuel cell system with a variation of the atmospheric pressure.

The invention relates to a device and method for culturing stichopus japonicus through circulating water and belongs to the technical field of aquaculture. The device comprises multiple culture ponds, a filter pond and substrata. The bottom of each culture pond is provided with four culture pond water inlet pipes. Water flowing out of the four culture pond water inlet pipes rotates clockwise. The four culture pond water inlet pipes are connected with filter pond water outlets. Culture pond water outlet pipes are connected with filter pond water inlet pipes. The substrata are further arranged in the culture ponds. The device and method have the advantages that culture efficiency and culture quality of the stichopus japonicus are improved, economic benefits are increased, the culture environment is improved, the potential influence on the environment by wastewater discharge is reduced, culture water and energy are saved, and upgrading and transformation of ocean aquaculture in north are facilitated.