Adjustable injection for achieving different local refrigerant distributions

The invention relates to a heat exchanger (1) for indirect heat transfer between a process medium (P) and at least one first refrigerant (M), comprising a housing (5) which surrounds a housing space (6) and extends along a longitudinal axis (z), and a tube bundle (3) which is arranged in the housing space (6) and which extends in the housing space (6) along the longitudinal axis (z) of the housing (5) from a lower end (3c) to an upper end (3d) of the tube bundle (3), wherein the tube bundle (3) has a plurality of first tubes (31) for receiving a first refrigerant (M), the first tubes being arranged in different tube layers, the first tubes (31) being wound in a spiral shape on a core tube (300) of the heat exchanger (1), the core tube extending in the housing space (6) along a longitudinal axis (z) of the housing (5). According to the invention, the first tubes (31) each have an end (31a) formed by at least one nozzle, by which the first refrigerant (M) can be introduced into the housing space (6), the ends (