How to calculate the ship's endurance

1. You have to have the CSR fuel consumption of the main engine
if you know that the CSR power of the main engine of a ship is 9000kw
the main engine fuel consumption obtained from the workshop test is 170g / kW. HR
the enrance is 22000 nautical miles, the speed is 14.5 knots

the minimum fuel required is
220000 / 14.5 = 1517 sailing hours
1517 * 9000 * 170 / 1000000 = 2321 tons
see, at least you have so much fuel, Actually, we have to add some margin

2. How far can a ship run with full fuel

3. Enrance capability refers to the continuous navigation capability of ships and aircraft. However, the enrance of the same ship or aircraft at different speeds is quite different. Take the submarine as an example:
1. The enrance of underwater speed: the battery can only be used underwater. If the maximum speed is used, the power consumption will be about one hour. If the maximum speed is 20 knots, the enrance of underwater speed is about 20 nautical miles; If the economic speed (such as 8 knots) is used, the enrance generally ranges from hundreds of nautical miles to thousands of nautical miles. It is reported that the underwater enrance of the German 209 submarine has even reached 13000 nautical miles / 10 knots
2. Enrance of surface navigation: diesel engine is used for surface navigation. If the economic speed (such as 10 knots) is used, the enrance can reach about 8000 nautical miles; If sailing at a speed of 7 knots, the enrance may exceed 10000 nautical miles. For example, the enrance of Agosta submarine in France is 8500 nautical miles / 9 knots.

4. The correct expression of the battery pack should be how many V and how many ah. Among them, ah expresses ampere hour. A is current ampere. H is time hour. It reflects the proct of current and time. For example, the popular understanding method of 48V 10Ah battery pack is that when the voltage of the battery pack is 48V, it can be discharged for 10 hours with 1A current or for one hour with 10A current If you understand this, you will not understand the meaning of the above battery pack. How to calculate the mileage standard? Let's make a simple explanation. For example, 48V 10Ah battery pack is used in 350W motor... Here we need to use several formulas. P = u * a, where p is the power, which is 350W, u is the voltage, and 48V A is the current. From the above formula, we can infer the power of 350W motor The rated working current is about 7.3a. The running time of 10Ah battery pack is about 10Ah / 7.3a = 1.37 hours. If multiplied by the uniform speed of 30km / h, that is 30km / h * 1.37 = 41.1km

5. Economic speed refers to the speed at which the fuel consumption per nautical mile of the ship is the least when the main power plant and auxiliary equipment are partially working (or operating under low load) under the specified loading state and navigation conditions. In short, it is the speed of the minimum fuel consumption. Cruising speed is the speed commonly used in ship cruising. It is usually different for the same type of ship to specify a main engine speed as the cruising speed. Ship enrance refers to the maximum distance that a ship can reach at a given speed with a full load of combustion, mechanical water and lubricating oil. Measurement in nautical miles is one of the key elements of warship tactical and technical performance. The enrance of different speed is different, and the enrance of economic speed is the biggest. The energy of nuclear fuel of nuclear powered ship is huge. The main limiting factor of enrance is the continuous working time of machinery and equipment. For conventional power ships, the main task is to improve the hull shape and rece the navigation resistance; Rece the fuel consumption rate of power plant to improve the enrance.

6.

Enrance is a broad concept with multiple meanings

It is often said that enrance refers to the maximum range that a ship or an aircraft can continuously travel or fly after it is fully loaded with fuel. The maximum range at cruise speed is enrance

7. I remember that there are many calculation formulas in ship design principles
the fuel consumption of the ship can only be estimated as follows: main engine fuel consumption + auxiliary engine fuel consumption + boiler fuel consumption
roughly, I don't know if I remember correctly: fuel consumption of main engine and auxiliary engine = g * p * Z * t / 1000000g (fuel consumption rate of main engine P rated power of main engine Z number of main engines T)
fuel consumption of enrance auxiliary engine (diesel generator set) = g * p * k * TG fuel consumption rate of auxiliary engine P rated power of auxiliary engine K is determined according to load calculation sheet of power station, Generally, it is selected as 0.75 ~ 0.9
the boiler seems to be a small proportion of the main engine consumption.

8. Unknown_Error

9. The longest distance a ship can travel at different speeds.

10.

The displacement of a ship floating on the surface is equal to the weight of the ship. Ship displacement is the weight of boiled water discharged by the ship in still water, measured in tons

the volume of boiled water discharged from the ship's water inlet is called volume displacement, which is measured in cubic meters. The volume displacement multiplied by the specific gravity of overboard water is the weight displacement

displacement is a symbol of the size of a ship and one of the key elements of tactical and technical performance. The displacement of surface gauge boat is divided into no-load displacement, standard displacement, normal displacement and full load displacement. The displacement of submarine is mainly divided into surface displacement and underwater displacement

full surface displacement of surface combat ships, the smallest is only a dozen tons, the largest nearly 100 thousand tons, speed 15~60 knots, enrance 300~8000 nautical miles (nuclear powered aircraft carrier to 700 thousand knots), self supporting force 3~30 days and nights, the wave force is 3~6 level sea condition, can effectively make use of weapons, 4~9 level sea condition can awesome navigation. P>

awesome underwater displacement of 500~30000 tons, underwater speed of 15~42 knots, enrance 4000~20000 nautical miles (nuclear powered submarine can reach 10~40 knots), self supporting force 10~90 days and nights, diving depth 200~500 M. p>

extended data

the density of water in different waters is different, and the density of sea water is about 1025 kg / M & # 179;;, The density of fresh water is about 1000 kg / m;;. When a ship sails into or out of the inland river from the sea area, the draft of the ship will change, while the total weight of the ship remains unchanged, so does the weight of the discharged water, that is, the displacement of the ship does not vary with the change of water density in the water area

according to Archimedes' principle, the upward buoyancy of a submerged object is equal to the weight of the discharged water, while the vertical gravity of a floating ship is equal to the buoyancy, that is, its weight is equal to the weight of the discharged water