Venturi effect and its application on ship

What is the Venturi effect?

Definition: Venturi effect is the reduction of pressure that occurs when a fluid passes from a constricted section of a pipe with increasing velocity.

Conservation of energy: Conservation of energy states that energy can neither be created nor be destroyed, it can only be converted from one form to another form of energy.

equation of comtinuity

What are the applications of the venturi effect?

1. It is used in carburetors, in this case the inlet air pressure difference causes the fuel to be drawn to the carburetor, when fuel is sucked from the oil tank it mixes with air and creates a fine spray that allows fine combustion.

fuel discharge nozzle
Fuel discharge nozzle

2. In ship we do not boil water at 100°C, we use an Eductor for it which reduces the atmospheric pressure inside the freshwater generator casing (up to 85% vacuum) by using the venturi effect and boiling the seawater around 45-50°C.

eductor
 Eductor system
fresh water generator
Fresh water generator

3. Used in emptying of ballast tanks in ships: Eductor is used to suck in the water level in ballast tanks, which are at very low levels and cannot be sucked in by Centrifugal Ballast Pumps. Please note that if we do not empty the Ballast tanks we are losing money as we will be carrying less cargo.

ballast water discharge and the environment
Ballast water Discharge
Image showing ballast tank
Image showing ballast tank

Note:

If you want to learn more about this topic, we suggest checking out our Combo package with the given link https://www.merchantnavydecoded.com/courses/c/ . It’s a great way to dive deeper into the subject through video explanations. This package covers all the important details and presents them in an easy-to-understand format. Watching the videos will help you grasp the topic better and make learning more enjoyable. So, we highly recommend giving our Combo package a try to enhance your knowledge on the subject.

Disclaimer :- The opinions expressed in this article belong solely to the author and may not necessarily reflect those of Merchant Navy Decoded. We cannot guarantee the accuracy of the information provided and disclaim any responsibility for it. Data and visuals used are sourced from publicly available information and may not be authenticated by any regulatory body. Reviews and comments appearing on our blogs represent the opinions of individuals and do not necessarily reflect the views of Merchant Navy Decoded. We are not responsible for any loss or damage resulting from reliance on these reviews or comments.

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