Which principle is used in construction of ship?
To construct a ship that floats when immersed water, marine engineers and naval architects rely on the Archimedes principle. This principle describes an upward buoyant force that is exerted on a body that is fully or partially immersed in a fluid, which is equal to the weight of the fluid displaced by the body.
What is ship engine load?
Load factor: The engine load factor is defined as the actual power output of the engine relative to its Maximum Continuous Rating (MCR). The Load factor is normally specified in percent. An engine working at 50% of its maximum load has a load factor equal to 50%.
How do you calculate torque of a ship engine?
Engine torque is measured using the following formula: (5,252 x hp) ÷ rpm.
How is ship power calculated?
In the load chart, the power requirements of each electrical load on the ship is calculated by multiplying the Maximum Rated Power of the component with two factors: Load Factor: It is the ratio of the operating power to the maximum power rating of the component.
What is the basic principles of ship structures structural design?
Design Principles of Ships and Marine Structures focuses on ship design efficiency, safety, sustainability, production, and management, and appeals to students and design professionals in the field of shipping, shipbuilding and offshore engineering.
What is MEP and MIP in engine?
It is determined graphically from a diagram or calculated from engine parameters. anand fun 4 soln fun 4soln Indicated Mean Effective Pressure or Mean Indicated Pressure (MIP) Mean Effective Pressure (MEP) Define Brake power,Indicated power and Mechanical efficiency.
What is BHP in marine engine?
Brake Horse Power: Brake Horsepower measures the HP of an engine without considering the loss in power that is caused by auxiliaries attached to the engine, such as the shaft generator, alternator, gearbox, and other auxiliary parts.
What is a basic design of the ship?
The combination of concept design stage and preliminary design stage is also known as basic design. Based on the results of the basic design, both the main technical features and the construction cost of an economically efficient vessel can be reliably estimated.
What are the factors affecting the ship stability?
Stability overview Stability is determined by the force of buoyancy provided by the underwater parts of a vessel, coupled with the combined weight of its hull, equipment, fuel, stores and load. These forces can also be adversely affected by the prevailing weather conditions and sea-state.
What is the density of a ship?
On an empty ship with a steel hull enclosing a volume of air, the ship’s density is equal to the sum of the mass of the steel hull and the mass of the enclosed air, all divided by the hull’s volume: The ship floats because its density is less than the density of water.
How do ships work?
Ships float in the water at a level where mass of the displaced water equals the mass of the vessel, so that the downwards force of gravity equals the upward force of buoyancy. As a vessel is lowered into the water its weight remains constant but the corresponding weight of water displaced by its hull increases.
What is MCR speed?
MCR is maximum continuous rating and is used for describing the specific fuel consumption or the daily fuel consumption when the ship is cruising at maximum speed. For the propulsion engine the speed and engine load are same or corresponding and hence these ratings. The ship is always operating at service speed.
What is brake power formula?
The power developed by an engine at the output shaft is called brake power and is given by Power = NT/60,000 in kW where T= torque in Nm = WR W = 9.81 * Net mass applied in kg.
How is the engine of a ship selected?
When the ship’s necessary power re quirement, including margins, and the propeller’s speed (rate of revolution) have been determined, the correct main engine can then be selected, e.g. with the help of MAN B&W Diesel’s computerbased engine selection programme.
What are the different terms used to define ship sizes?
Chapter 1 describes the most elemen- tary terms used to define ship sizes and hull forms such as, for example, the ship’s displacement, deadweight, draught, length between perpendicu- lars, block coefficient, etc.
How many shaft generators needed to run a ship?
If the expected trade pattern of the ship is to be in an area with frequently appearing heavy wind and sea and 25 Shaft generator Propulsion curve for heavy running O 7 1 2 Engine service curve for heavy running MP SG
What is the size of the thrust deduction coefficient for ships?
The size of the thrust deduction coeffi cienttfor a ship with one propeller is, normally, in the range of 0.12 to 0.30, as a ship with a large block coefficient has a large thrust deduction coefficient.