Abstract: A heat exchanger for use in a vehicle air conditioning system is provided. The heat exchanger includes a plurality of heat exchanger registers adapted to transfer heat from an air flow passing thereby to a refrigerant flowing therethrough. The heat exchanger further includes a plurality of junction elements in fluid communication with the heat exchanger registers. Each of the junction elements is disposed between one of a pair of top collector lines and a pair of bottom connector lines of the heat exchanger registers. The junction elements have a hydraulic flow area that militates against pressure losses over the heat exchanger. A heat exchanger having an arrangement of three heat exchanger registers and a vehicle air conditioning system including the heat exchanger are also provided.

Abstract: Ammonium sulfamate is prepared continuously, starting from ammonia and sulfur trioxide, by introducing liquid sulfur trioxide and liquid ammonia in a molar ratio NH.sub.3 /SO.sub.3 greater than 2.0:1 into a pressure reactor containing molten reaction product. Excess ammonia is removed continuously from the reactor. The liquid sulfur trioxide is introduced into the melt, while the liquid ammonia is fed onto the surface of the melt.