Heat transfer fluids are vital to many processes worldwide. To ensure their ongoing, safe operation, it is important to protect the fluid not only during regular operation but also during system startup and shutdown. Here are some guidelines to ensure a smooth startup and shutdown of your heat transfer system.
The two primary characterizations of fluid flow in a pipe are laminar flow and turbulent flow. Laminar flow is described as a smooth, layered flow in which the quickest flow happens at the center of the pipe. Turbulent flow is choppy and tumultuous with no specific pattern. The point at which fluid flow transitions from laminar to turbulent flow is defined by the Reynolds number, a dimensionless number characterized by the length of pipe through which the fluid is traveling, and the fluid’s density, viscosity and velocity.