A variable geometry ejector (300) for cooling applications is disclosed comprising a primary fluid chamber (302); a suction chamber (320) downstream the primary fluid chamber (302); a primary nozzle (310) arranged so as to stream a working fluid from the primary fluid chamber (302) to the suction chamber (320); and a tail member (325) arranged downstream the primary nozzle (310), wherein any of the primary nozzle (310) and the tail member (325) is movable in relation to the other. The invention further discloses a system comprising the variable geometry ejector (300). The invention applies to cooling apparatus and systems industry.