Abstract: Preventing freezing in a heat exchanger can include passing first and second cooling fluids through the heat exchanger, monitoring a temperature and/or pressure of the second cooling fluid entering the heat exchanger, heating the second cooling fluid entering the heat exchanger by opening a valve when the monitored temperature and/or monitored pressure is below a trigger temperature and/or trigger pressure, and closing the valve when a condition is met. The first cooling fluid can have a first freezing temperature and the second cooling fluid can have a second, lower freezing temperature. Opening the valve can cause the second cooling fluid, in gaseous phase, to mix with the second cooling fluid, in liquid phase, upstream of the heat exchanger.

Abstract: An insulating element includes a sheet of polymer based blanket material having multiple panels and at least one hinge for interconnecting the multiple panels. A method for making such an insulating product includes the forming of a sheet of polymer based blanket material with multiple panels and at least one hinge for interconnecting the multiple panels and erecting the sheet of polymer based blanket material into a three dimensional insulating product by folding the sheet about the hinge.