The engine room (or ER) of a large marine vessel such as a tug boat, fire boat, or mega ship houses the vessel’s prime mover, usually some variations of a heat engine – diesel engine, gas or steam turbine, or some combination of these. On a large percentage of vessels ships and boats, the engine room is located near the bottom, and at the rear or aft end of the vessel, and usually comprises few compartments. As shown in this video tour of a mega ship’s engine room, there are numerous components within the engine room including boilers, generators, fuel pumps, exhaust manifolds and more. Many of these marine engine room components benefit from the installation of insulation blankets.
Marine Exhaust Insulation Blankets
In a mega marine vessel, such as the one featured in the video tour above, the engine room also contains the exhaust system. An exhaust system is usually piping and manifolds used to guide reaction exhaust gases away from a controlled combustion inside the engine. To increase energy efficiency, some ships redirect the heat from the engine exhaust using an exhaust manifold to heat a steam boiler for driving a steam turbine. Thermaxx provides removable custom insulation solutions for these marine exhaust manifolds and piping systems.
In U.S. Patent Number 6,041,595 titled, “Thermal insulation for the exhaust manifold for reducing passive formation of NOx and reduction of unburned hydrocarbons in the exhaust gas” the reasons for insulating the exhaust manifold are summarized perfectly,
“The reason for providing this protection to the exhaust manifold which delivers hot exhaust gas to the turbine is threefold. First, the delivering of higher temperature gas to the turbine increases the turbine efficiency. Second, maintaining higher temperature in the exhaust manifold enhances the oxidation of unburned hydrocarbons in the exhaust gas. Modern engines run lean so there is sufficient oxygen to permit this oxidation providing the time is sufficiently long and the temperature is sufficiently high. A third reason for insulating the manifold is to prevent the ambient air around the engine from contacting the hot manifold surface. This contact causes passive formation of NOx simply by oxidation of the nitrogen in the air when it is in contact with the hot exhaust manifold surface. Thus, these three conditions are improved by application of the insulation.”
Marine Engine Room Sound Insulation
Marine engine rooms are loud! So loud that engineers and other occupants must wear protective hearing equipm. If you’ve never heard the sound of an engine room, check out the video tour mentioned above to get an idea. Safety codes have been adopted by the International Maritime Organization regarding noise levels on board ships.
The purpose of the code is to provide for safe working conditions by giving consideration to the need for speech communication and for hearing audible alarms, and to an environment where clear-headed decisions can be made in control stations, navigation and radio spaces and manned machinery spaces; and to protect the seafarer from excessive noise levels which may give rise to a noise-induced hearing loss; and provide the seafarer with an acceptable degree of comfort in rest, recreation and other spaces and also provide conditions for recuperation from the effects of exposure to high noise levels.
Thermaxx Jackets isolate machine vibrations, reducing exposure of harmful ambient noise to your crew. Custom solutions can be made to fit your vessel’s needs. First, we evaluate the spectrum of frequencies being emitted, then we assemble the perfect combination materials to reduce each elevated frequency to your desired decibel level. Learn more about our sound insulation here.
Marine Insulation Materials
Thermaxx Jackets knows that choosing the right insulation materials is critical when planning an insulation project. We consider the environment & what temperatures the insulation will exposed to, among many other things. For marine applications, we ensure that our insulation blankets are chemical resistant, heat resistant, and able to adapt to the rapidly changing conditions inside the engine room.
We use materials such as Pyrogel® XT-E High Temperature Aerogel Insulation in our insulation blankets, because it’s hydrophobic, offers acoustic insulation benefits, and can withstand temperatures up to 1200F, which is perfect for marine applications!
For more information getting Thermaxx Jackets removable insulation in your engine room, contact us.