A pre-installed hydrodynamic energy saving device. The device is composed of guide vanes and ducts, installed near the front of the propeller, with the shaft center offset above propeller shaft, and equipped with 4-5 guide vanes that generate pre-swirl flow inside. The outer circumference of the guide vanes is a duct, which improves the uniformity of the inflow in the upper half plane of the propeller, enhances the hull efficiency of the ship, and reduces the energy loss from propeller wake rotation.

To eliminate energy loss from propeller hub vortex, some additional small blades are added on the propeller cap with the same number as the propeller blades, which is called FPHC——a ship propeller hydrodynamic energy saving device.

Rudder bulb (also known as "rudder bulb system"), which can break up hub vortices, restore pressure on the rudder bulb and rudder surface, and reduce energy loss from wake rotation, is an advanced ship maneuvering device, whose main function is to improve the maneuverability and propulsion efficiency of ships under various navigation conditions. The rudder bulb combines the advantages of traditional rudder and modern design, aiming to optimize the maneuverability and energy saving effect of ships.

Based on the personalized shipping demands from ship owners, HEP, a kind of device, highly coordinated with hydrodynamic energy saving equipment, is customized through integrated research and development platform. Optimize the performance of propeller by improving the blade shape, material and operating mode. This will greatly improve the efficiency of marine propulsion system, reduce fuel consumption and operating cost, which can bring significant energy saving and environmental protection effects.