0
Slow speed propulsion engines, such as diesel engines used in ships, have high thermal efficiency due to their large size and design. The large size allows for better combustion, reduced heat losses, and increased efficiency in converting fuel energy into mechanical work. Additionally, slow speed engines operate at a lower compression ratio, which helps improve thermal efficiency by reducing heat losses during combustion.
What else can I help you with?
When scientists studided boat propulsion what did they learn about propellers?
Scientists studying boat propulsion have learned that propeller design significantly impacts a boat's efficiency and performance. Factors such as blade shape, pitch, and material can affect how efficiently a propeller moves water and creates thrust. Improving propeller design can lead to better fuel efficiency, speed, and maneuverability for boats.
What motion is and boat moving thought water?
The motion of a boat moving through water is a combination of forward propulsion generated by the engine or sails, and resistance from the water. The boat's hull shape and design affect its speed and efficiency, while factors such as wind, waves, and currents can also influence its motion.
What factors contribute to the efficiency of a Stirling engine?
The efficiency of a Stirling engine is influenced by factors such as the temperature difference between the hot and cold sides, the design of the engine components, the quality of the materials used, and the speed at which the engine operates. These factors impact how effectively the engine can convert heat energy into mechanical work.
What determines the speed of a piston?
The speed of a piston is primarily determined by the engine's RPM (revolutions per minute). A higher RPM typically results in a faster piston speed. Additionally, factors such as piston weight, engine design, and combustion efficiency can also influence the speed of a piston.
What kind of mechanism followed in high speed bullet train?
High-speed bullet trains typically use electric propulsion systems powered by overhead wires or onboard batteries. They rely on electromagnetic technology to propel the train forward and enhance speed and efficiency. These trains also feature advanced automation systems to control speed, braking, and maintain safety protocols.
What is the Fuel consumption of a cargo ship?
The amount of fuel burn for a marine vessel is dependent on multiple factors. These include the vessel size, tonnage, propulsion type (fuel oil, diesel, nuclear, etc.), speed, marine conditions, and the engine efficiency itself.
What is Propulsion resistance?
Propulsion resistance refers to the resistance encountered by a vessel or vehicle as it moves through a fluid, such as water or air. This resistance is primarily due to the friction between the fluid and the surface of the vessel, as well as the pressure differences created by its motion. In maritime contexts, propulsion resistance is a key factor in determining the efficiency of a ship's propulsion system, affecting fuel consumption and speed. It can be influenced by factors such as hull design, speed, and the viscosity of the fluid.
What is a synonym and antonym of propulsion?
Some synonyms for propulsion are drive, energy, momentum, power, speed, or thrust. Propulsion is a noun, there is no antonym except 'no propulsion'.
What are the benefits of swimming with flippers for improving speed and efficiency in the water?
Swimming with flippers can improve speed and efficiency in the water by increasing propulsion and reducing drag. Flippers help swimmers move through the water more quickly and with less effort, allowing for a more efficient and effective swimming technique.
UAV Propulsion System Market?
A UAV (Unmanned Aerial Vehicle) propulsion system refers to the combination of components that power and control the movement of an unmanned aircraft. The propulsion system typically includes an engine or motor, a propeller or rotor, and a control system that regulates the speed and direction of the aircraft.
What is the general speed at which thermal energy moves through a thermal insulator?
There is no general speed. The efficiency of the insulator can be measured by how long the heat takes to pass through.
When scientists studided boat propulsion what did they learn about propellers?
Scientists studying boat propulsion have learned that propeller design significantly impacts a boat's efficiency and performance. Factors such as blade shape, pitch, and material can affect how efficiently a propeller moves water and creates thrust. Improving propeller design can lead to better fuel efficiency, speed, and maneuverability for boats.
What motion is and boat moving thought water?
The motion of a boat moving through water is a combination of forward propulsion generated by the engine or sails, and resistance from the water. The boat's hull shape and design affect its speed and efficiency, while factors such as wind, waves, and currents can also influence its motion.
Can a helicopter fly at Mach 1.5?
No, a helicopter cannot go at the speed of Mach 1.5. It is because, this kind of propulsion can only be achieved through a jet engine. A helicopter's engine cannot achieve that.
How efficient is the combustion engine?
The efficiency of a internal combustion engine varies with size, speed range, compression ratio etc. Diesel engines use higher compression ratio and operate without throttle control, therefore their efficiency is higher than a equivalent Otto engine. Large marine (read ship engines) or stationary diesel engine: 50% Heavy duty diesel engines for marine, stationary and vehicle applications (trucks): 40% Light duty diesel engines (cars): 30-35% Gasoline engines: 20-25% + a few % for newer engines The numbers mentioned above are maximum efficiency, not pedal to the metal efficiency. Please note that the thermal efficiency of a engine will increase if the combustion chamber surface decrease(!). Higher revs leads to higher forces acting on the piston rings and therefore higher frictional losses, in other words: the mechanical efficiency decreases with increased speed.
What is half ahead?
"Half ahead" is a nautical term used to instruct the crew to set the engine speed at half of its full ahead power. It is commonly used on ships to control the speed and propulsion of the vessel.
What is the average speed of an ocean going freighter?
Cruising speed (best balance of speed and efficiency ) is normally about 10 knots, top speed around 29 knots. Actual speeds varies from ship to ship depending of hull design and propulsion systems.10 knots = 18.52 kilometers per hourCheers
