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Cooling Water Systems Jacket Cooling Water and Piston Cooling Water.
Cooling Water Systems: Jacket Cooling Water and Piston Cooling Water Introduction: Cooling systems play a vital role in maintaining optimal operating conditions for marine engines. This article focuses on two essential cooling water systems: the jacket cooling water system and the piston cooling water system. We will explore their functions, components, and the importance of…
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Fixed Pitch Propeller VS Controllable Pitch Propeller
What are the differences between Fixed Pitch Propeller and Controllable Pitch Propeller? Following are the key differences between Fixed Pitch Propeller and Controllable Pitch Propeller Sl. No Solid / Fixed Pitch Propeller Controllable Pitch Propeller 1 Speed of Ship is controlled by varying the speed of Engine Speed of the ship is controlled by varying…
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Methods of Fresh Water Generation from Seawater
Methods of Fresh Water Generation from Seawater 1. Submerged Type Boiling Evaporator (Steam Evaporator) – This method involves a boiling process to evaporate seawater and produce fresh water. – The evaporator operates under low pressure. 2. FWG (Fresh Water Generator) [Alfa-Laval] – FWG is a type of freshwater generator designed by Alfa-Laval. – It utilizes…
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Classification of Ships as per Propulsion Plants
Classification of Ships as per Propulsion Plants M.V. – Motor Vessel (i) Diesel Engine Propulsion 1. 2-stroke Diesel Engine – Low/Slow Speed (< 300 rpm) The propeller shaft is directly connected to the main engine. Constant-pitch propellers are used. The speed of the ship is controlled by adjusting the speed of the main engine. Reversing…
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Boiler Maintenance
The Importance of Boiler Feed Water Chemical Treatment Boilers are operated under high steam pressure, high steam temperature, and high steam capacity, which makes it crucial to use very pure water as feed water for boilers. Even pure water will contain some dissolved salts, also known as hardness salts. (i) Some dissolved salts precipitate out…
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Air compressor
Types of Compressors: Rotary, Reciprocating, Centrifugal & Screw Reciprocating Air Compressor The electric motor provides a rotating motion to the crankshaft. The construction of a reciprocating air compressor is similar to that of an internal combustion engine. The connecting rod converts the rotating motion of the crankshaft into the reciprocating motion of the piston. When…
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Types of circuit breaker
Types of Circuit Breakers [Based on Arc Quenching (Cooling) Media] 1. ACB: Air Circuit Breakers 2. ABCB: Air Blast Circuit Breakers 3. OCB: Oil Circuit Breakers 4. VCB: Vacuum Circuit Breakers 5. SF6CB: Sulphur-Hexa-Fluoride Circuit Breakers Usage: 3 Phase, 440V – Fitted in MSB / PDB 6. MCCB: Moulded Case Circuit Breakers (100-1000A) Usage: 3…
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STEP-UP TRANSFORMERS & STEP-DOWN TRANSFORMERS
Step-Up Transformers: Step-up transformers have a higher number of turns in the secondary winding compared to the primary winding. They are used to convert low voltage (high current) electricity to high voltage (low current) electricity. The voltage is stepped up in this process. Step-up transformers are commonly used in power plants, X-ray machines, and microwave…
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Purifier drive with a frictional clutch
The purifier drive with a friction clutch arrangement is designed to drive the horizontal shaft of the purifier. Here are the key points about this arrangement: 1. Friction Drum: A friction drum is mounted on the horizontal shaft. It provides the surface against which the friction pads exert force to generate friction. 2. Friction Pads:…
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Points Common to Acid and Alkaline Batteries
Points Common to Acid and Alkaline Batteries 1. Gas Evolution: Both acid and alkaline batteries undergo a chemical breakdown of water (H2O) present in the electrolyte, resulting in the evolution of gases. Oxygen (O2) and hydrogen (H2) gases are generated during the battery operation. 2. Corrosive Electrolyte: The evolved gases carry a mist of corrosive…