A method for coordinating beam forming between two communicating entities includes obtaining cell loading information and adjusting a number of used beam-sets at a specific scheduling time according to the cell loading information. The acrylic sheet or panel is placed substantially parallel to the opaque surface or panel such that the acrylic sheet or panel and the opaque surface or panel are separated by a distance of between 1 and 185 millimeters. Synthesis of urea can be then continued by a urea synthesis unit in the shut down system by using the increased recovered CO2 and the liquefied ammonia.