Abstract: A controller, process, and glass manufacturing apparatus can be configured to minimize defects. Embodiments can be adapted to control injection of nitrogen and/or argon and a mixture of nitrogen and hydrogen or nitrogen, hydrogen, and argon during glass float manufacturing to facilitate a pre-selected hydrogen concentration within a tin bath furnace while also minimizing glass surface defects that can be caused from tin condensation and tin bath impurity concentrations. Empirical use data can also be collected and provided to a pre-defined machine learning element of a host device to update a pre-defined control scheme of a controller for adapting the operational condition set points or other target values to account for furnace operation history and performance.

Abstract: A method for controlling a refrigeration device including a variable speed compressor and variable speed evaporator and condenser fans includes modifying a PID control scheme by calculating a factor to reduce the restart speed of the compressor depending on the length of time the compressor was at rest, and modulating the point of oscillation of the control process.

Abstract: A method for controlling a refrigeration device including a variable speed compressor and variable speed evaporator and condenser fans includes modifying a PID control scheme by calculating a factor to reduce the restart speed of the compressor depending on the length of time the compressor was at rest, and modulating the point of oscillation of the control process.