In the engine the valves are in control of air intake and exhaust gases flow. With time and continuous work of the engine the valve clearances are changed due vibrations, failure of springs and securing nuts and bolts or due to wear of valve and seats. Wear of the valve gear tend to increase the…
Wear edge is formed in the top position of the upper piston ring when the cylinder liner is worn after many thousands of hours of service or from abnormal running conditions, such as scuffing or corrosion. With heavily worn cylinder liners, it is a necessity to remove the edge prior pulling out the piston, otherwise…
I believe that, not only once, you have noticed during engine performance check that the engine is running unbalanced with one unit running at low Pmax while others, depending on engine firing order, are trying to balance and compensate the low Pmax on that particular unit. As you may be aware, the first instinct is…
VIT or Variable Injection Timing is a form of fuel pump control, enabling an engine to operate with the designated maximum cylinder firing or combustion pressure from approximately 75% power output to maximum power. This improves thermal efficiency and lowers fuel consumption. The fuel consumption for an engine at any load will be related to…
The idea of this post came from one of my followers, which contact me and ask for my advice and opinion with regard to one of his generator’s ACB “non close” alarm. An alternative current power generating system comprises of a number of diesel generators, which transform diesel engine’s mechanical energy into electrical energy. Generally,…
Author – Daniel G. Teleoaca – Marine Chief Engineer Understanding the Scavenging Air System The turbocharger uses the exhaust gas from the engine to compress new air and charge the engine with a positive pressure higher than ambient conditions. Exhaust gas temperature convection and compression raises the temperature of the air and this cannot be…
I believe that most of the marine engineers encountered, at least once in their career a turbocharger surging. This is not a pleasant experience, especially if you a in the close proximity of the turbocharger when at such happens, due loudly noise and backpressure effect. Turbochargers are designed to match the engine and balance the…
In the race for cleaner and more sustainable transportation fuels, methanol emerges as a strong contender. This simple alcohol, with the formula CH3OH, holds promise for powering cars, ships, and even some industrial applications. It is worldwide available as a marine fuel, cost effective and significantly reduces emissions of sulphur oxides, nitrogen oxides, CO2 and…
Another fuel alternative which is taken into consideration is Ammonia which recently has gained increased attention as a possible marine fuel that could help accelerate the decarbonization process. Ammonia is also interesting in the context of a growing hydrogen economy because it is the cheapest way to transport hydrogen over long distances and in large…
Although the marine industry relies heavily on fuel oils for the majority of its power generation, stricter emission regulations and the plan to “go green” are convincing operators to consider alternatives. To comply with the new emissions standards known as IMO 2020, a growing number of the world’s shipping companies, builders, and operators are turning…