A robotic fish comprises one or more torque reaction engines and a fish body, wherein the torque reaction engine cyclically oscillates and causes a wave to propagate across the fish body, including through a flexible wing, accelerating thrust fluid and propelling the robotic fish.

A planing boat including: a hull having a boarding area; a screw unit having a screw, and configured to be rotatable with respect to the hull so that the expulsion direction of a water current by the screw can vary by 360 degrees; and a direction change mechanism having a turning drive force source, and configured to change the expulsion direction by rotating the screw unit with respect to the hull with a drive force of the turning drive force source.

A planing boat including: a hull having a boarding area; a screw unit having a screw, and configured to be rotatable with respect to the hull so that the expulsion direction of a water current by the screw can vary by 360 degrees; and a direction change mechanism having a turning drive force source, and configured to change the expulsion direction by rotating the screw unit with respect to the hull with a drive force of the turning drive force source.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000 C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000 C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

An unmanned vehicle capable of tunneling into soft materials, such as sand, comprises a hollow, bullet-shaped forward outer body with a first drive screw thread integrated into its exterior, a hollow cylindrical rear outer body with a second drive screw thread integrated into its exterior but threaded in the opposed direction of the first drive screw thread, and an inner body that is rotatably coupled to the inside of the forward and rear outer bodies via mechanical gears, and including directional control fins mounted on a housing at the rear end of the inner body.

A robotic fish comprises one or more torque reaction engines and a fish body, wherein the torque reaction engine cyclically oscillates and causes a wave to propagate across the fish body, including through a flexible wing, accelerating thrust fluid and propelling the robotic fish.

A robotic fish comprises one or more torque reaction engines and a fish body, wherein the torque reaction engine cyclically oscillates and causes a wave to propagate across the fish body, including through a flexible wing, accelerating thrust fluid and propelling the robotic fish.

The invention discloses an emergency life-saving device applicable to a wide area water surface. The body is provided with a bottom plate slot opening downward, and left and right sides of the bottom plate slot are symmetrically provided with a power cavity opening downward. The top side of the power cavity is provided with a bevel gear cavity, and the bevel gear cavity and the power cavity are provided with a power device for driving the body to advance and turn. Push down. Compared with traditional life buoys, this device cannot automatically assist people to move. This device can automatically move people with the water down. While moving, it can also automatically control the direction and deceleration. The performance is greatly improved. At the same time, the device can still help people to swim forward when there is no electricity.

Spiral drive mechanism, particularly for mechanical vehicles, land and water machines, comprises of deformable spiral (1) of spindle shape, on one side resting on a rocker arm (2) with bearing, attached to the vehicle through a moving joint, through an axle (3) that moves the front part of the spiral in vertical, longitudinal and transverse axis. On the other side, it rests on a pendulum-moving driving axle of the vehicle (4), propelling rotating motion of the spiral and thus causing movement of the vehicle.