DCSPL offers in-house developed patented technology of IRSS for ocean going defense/naval ships.
We offer an exhaust gas cooling system comprising of direct water injection in form of fine atomized spray at multiple locations in exhaust gas duct for suppressing infra-red radiation generated in naval ships.
Hot exhaust gases coming out of diesel engines or gas turbines typically have temperatures above 550°C. In a naval ship, the high temperature exhaust gases coming out from ship engine can be detected by the enemy using infrared thermal detectors thereby making the ship vulnerable to effective attacks by enemy. Thus, the infrared (IR) radiation is one of the vital stealth signatures that needs to be minimized to conceal the naval vessels from IR-guided missiles. Infrared Suppression System (IRSS) for diesel engines are deployed for cooling of exhaust gases below 100°C before release into atmosphere to increase stealth capabilities of the ship.
Infrared suppression technologies available in market normally use very large size eductor/ diffuser assembly to achieve desired temperature, which occupy huge space on board ships and add to significant dead weight as well. Secondly, in the existing systems which normally use sea water as cooling liquid, certain amount of salty water remains in nozzles whenever the system is turned off. The residual sea water in nozzles evaporate causing deposition of salt and consequently clogging of the nozzles. Also, water remaining in the nozzles expedites corrosion, resulting in reduced life of nozzles.