3results about How to "Energy efficiency" patented technology

The present application relates to a kind of high-speed boat with two skids symmetrically arranged on the bottom of deep V planing boat, the extension length and the trim angle of the skid can be adjusted, and two sets of surface propeller propulsion systems are arranged at the stern, the horizontal direction and the vertical direction of the propulsion angle can be adjusted.The present application can maintain the good seaworthiness and rapidity of deep V boat type under high sea conditions.When sailing at high speed under normal sea conditions, the lift and the upward reaction force of surface propeller on the boat body will lift the boat body out of the water, and a very high speed can be achieved.For different sea conditions, manual or automatic control mode can be selected to adjust the sailing state and speed of the boat.The present application has simple structure, small resistance and high speed when skid is sliding, and has good safety, rapidity and energy efficiency ratio under the same power;PID automatic control system is used to ensure the safety, maneuverability and rapidity of the boat;The present application provides a high-speed boat type suitable for various sea conditions for military, police and other industries.

The utility model discloses a combined heat supply system based on an air source-water source heat pump, which comprises an air source heat pump unit, a water source heat pump unit, a user terminal and a controller, the air source heat pump unit is connected with the user terminal through a first circulating pipeline, and the water source heat pump unit is connected with the user terminal through a second circulating pipeline. The water source heat pump unit is connected with the first circulation pipeline through a third circulation pipeline, the controller is connected with the air source heat pump unit and the water source heat pump unit, and the controller controls the air source heat pump unit and the water source heat pump unit to work. The device has the beneficial effect of lower operation cost. And on the other hand, if electric heating or fuel gas or other modes are adopted for local heating, the system is complex, energy consumption is high, implementation is more tedious, and the combined heating system is simple in structure, convenient to operate and easier to implement.

The invention relates to the field of preparation of ultralow-temperature methanation catalysts, and discloses a nickel-based catalyst as well as a preparation method and application thereof. The catalyst comprises a magnesium-aluminum aerogel carrier, an active metal component and a performance additive, the active metal component is nickel; the performance additive is selected from at least one of a group IIIB metal element, a group IVB metal element, a group VB metal element, a group VIB metal element, a group VIIB metal element and a group VIII metal element; wherein the dispersity of the active metal component is not lower than 10%. The catalyst provided by the invention has the advantages of high activity, high methane selectivity and good stability when being applied to crude hydrogen purification ultralow-temperature methanation reaction.