Venturi effect and its application on ship
Last updated on March 28th, 2023 at 05:59 am
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.



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.

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.


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.


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Hello Scott Vasquez,
Thankyou for your appreciation and we will make more informative content like this.
Team Merchant Navy Decoded.