Turbocharging v/s Supercharging Supercharging is the process in which fresh air is compressed by a compressor which is driven by the crankshaft of an engine and then fed to the cylinder. Contrary to it, turbocharging is the compression of fresh air by a compressor which is driven by the exhaust gas. This is the crude…
A crude way to clean something is to wash it. This principle remains almost the same in all walks of life. If we talk about in terms of rocket science language can we wash exhaust gas? Sounds funny but we can, as after the implementation of global sulfur cap 2020 many ways were suggested and…
Abstract This paper provides an overview of the possible alternative fuels for the shipping industry for the propulsion purpose. A whopping 80% of world trade (by volume) is handled by the maritime transport, it also approximately produces 3% of the world’s greenhouse gas emissions, while also contributing to air pollution around coastal areas and ports….
If you want to move forward, you have to push from backward. Well, propeller does this work in ships. But, Will its construction vary from ship to ship? If yes, what are pitch propellers? what are its types? Pros and cons of FPP and CPP? Why CPP is preferred over FPP or vice versa? We…
Atomic energy was one of the most important breakthroughs in 20th century. It gave many opportunities to the man kind, which found its use in military. Many developed countries started building its own nuclear-powered aircraft carriers and submarines. But why not nuclear-powered merchant ships? Why nuclear-powered reactors are preferred over diesel powered engines in warships?…
Consider a case when you are given a fuel which is kept in a vacuum environment. By providing a spark just above the fuel pan what will be the results? Will it burn? The answer remains NO. Every fuel requires a certain volume of air(oxygen) to get burned A/F RATIO: it is the ratio of…
You might have often seen videos or pictures of ships tipping from one side to the other and getting destabilize while moderate waves crash against the ship. Most of the times, this is because of a failure in one of their systems, the stabilizers. We’ll find out how do these stabilizers actually balance a ship…
With the advent of technology, the maritime industry is changing every day. Each and every shipowner wants to make maximum profit with minimum investment. One such investment is expenditure on fuel oil on ships. The majority of fuel oil is consumed by the Main Engine. The OEMs(e.g.- MAN B&W, Wartsila Sulzer, Mitsubishi, etc.) are trying…
Below are few conceptual questions and answers on starting systems. Q1) What is starting of an engine? Ans- Starting of an engine is the process of overcoming the rest inertia of the engine and bringing the engine to a stage where it gains the ability to burn fuel(Firing RPM). For CI engines, Firing RPM is…
To ensure the stability and safety of the ships, we need to weigh them. But our ships weigh approximately 200,000 tons. I doubt that there is no such device to calculate this amount of weight. So, how do you do that? We actually don’t weigh them. we use a combination of scales and Archimedes principle….
