How is engine room ventilation calculated?
Gerr calculates the minimum total vent area in square inches for a passive ventilation system, i.e, no intake or exhaust blowers, by dividing total horsepower in the engine room by 3.3. He recommends adding 20 percent for most systems to make up for resistance from the ducting system.
What is ventilation in the engine room?
Engine room ventilation systems consist of both intake fans, which insert combustion air and cooling air, and exhaust fans, which pull out cooling air only. In case the temperature in the engine room rises, the exhaust fans start to pull out cooling air.
How do you calculate ventilation capacity?
Calculate the volume of the room in cubic meters by multiplying its length x width x height. Then multiply the room volume by the required number of air changes per hour, i.e.
Why engine room ventilation is required?
“Engines room are equipped with a ventilation system which should provide fresh air for combustion and for removing the heat radiated by main engines, auxiliary engines, boilers, generators and other hot equipment installed in compartment.
Why does engine room should always be under positive pressure?
Engine room should always be under positive pressure to assist ME and Generators turbocharging. Also, necessary to maintain ship’s engine room temperature. To avoid any hazard when engine room is unattended, make sure all combustible materials are stored in a safe place and secured properly.
How do you reduce engine bay temperature?
The only way to reduce heat is to remove them from engine bay. Wrap or blanket will not do this. Depends on how long you run, the engine bay will reach equilibrium.
What are the objectives of ventilation of an engine room?
Engine room of marine vessels are equipped with ventilation system which provide fresh air for properly oil burning in the combustion engines and to remove unwanted heat from the main engines, auxiliary generators and other heat sources.
What is engine room arrangement?
The engine room is usually located near the bottom, at the rear or aft end of the vessel, and comprises few compartments. This design maximizes the cargo carrying capacity of the vessel and situates the prime mover close to the propeller, minimizing equipment cost and problems posed from long shaft lines.