Cryocooler TG-RD

In order to meet the requirements for fast cooling speeds and low temperatures, it is sometimes possible to switch from conventional thermostat cooling to liquid gas cooling. KGW-ISOTHERM has developed a new KALTGAS application for this application. Here, the reactor is cooled using cryogenic nitrogen gas, thus enabling high cooling speeds. KALTGAS is a temperature control system based on the low temperature of liquid nitrogen as a refrigerant. The liquid nitrogen is vaporized in a cryogenic tank by means of a heater (jet). This generates a constant, cryogenic gas flow. By varying the heater (jet) on the safety controller (SC5), both the cooling capacity and the gas flow volume can be changed, and the LN2 consumption can also be reduced to a minimum by varying the jet power. The cryogenic gas flow is then fed through a vacuum-insulated, flexible metal pipe to a heat exchanger (heater). The heat exchanger has the task of heating the cold gas flow to the desired temperature. This means that a predefined gas flow with a predefined temperature is available as a coolant at the outlet of the heat exchanger. This constant gas flow is passed through a cooling coil suspended in the reaction vessel and cools the medium in the vessel. The cooling coil can be connected to the cold gas system using a quick-release fastener, making installation quick and easy.