PLATECOIL heating banks from Tranter Australia have been installed by a major marine oil spill recovery company to replace the existing pipe coil tank heaters.
Marine Spill Response Corporation (MSRC) is a not-for-profit US Coast Guard-classified Oil Spill Removal Organization (OSRO) formed to offer oil spill response services and mitigate damage to the environment.
MSRC operates a fleet of Responder-class Oil Spill Response Vessels (OSRVs) that receive recovered material in their holds, where it is heated as needed to accelerate gravity separation of oil and water phases. Following separation, the OSRV crew shuts down heating unless the weathered oil is very viscous, in which the heating is continued until the ship reaches port to maintain a pumpable viscosity.
High heat transfer rates are a critical factor in the design and operation of tank and cargo hold heating applications. The high heat transfer rate of PLATECOIL prime surface heat exchanger banks increases efficiencies and reduces operational cost when compared to conventional heating coil design. Additional savings can also be achieved from the drastically reduced material and installation costs over conventional pipe coil products.
In this instance, the recovered seawater had corroded the existing coated mild steel pipe coils in the tank heaters, leading to the installation of Tranter PLATECOIL bulk cargo heating banks at the MSRC vessel’s last dry docking. Tranter engineered and prefabricated the replacement banks from PLATECOIL Style 40D panels in Type 304 stainless steel. Each of the four banks per hull has 17–23 plates to heat the 4,000-barrel-capacity holds. The OSRVs are equipped with hydronic boilers using synthetic heat transfer fluid as a heating medium.
Given the limited access to the hold, the PLATECOIL panels were factory-prefabricated with inlet/outlet flanges and transported as separate pieces. Once moved into the hold, the panels were connected to flanged headers and secured within notched support frames using tie rods, reducing the shipyard labour from a major welding installation to a bolt-in installation, while also decreasing the overall capital cost of the project.
In many hold heating installations where standard vessel manways are present, the PLATECOIL panels can be factory-prefabricated into a rigid, integral unit comprising of manifold connections and support structures with integral feet. These complete assembled units can pass through standard manways to the cargo hold, where they are easily lowered into position and connected to the heating media distribution and return piping.
PLATECOIL heating banks conform to ASME, U.S. Coast Guard, DNV, ABS and Lloyds Register codes.