Abstract: There is disclosed a heat exchanger comprising at least one set of channels having a proximal end and a distal end, the set of channels comprising: a first channel defined by a first skin and a wall; and a second channel defined by a second skin and the wall, wherein the wall located between the first channel and the second channel comprises a first at least one aperture to allow fluid to pass through the wall from the first channel to the second channel.

Abstract: There is disclosed a heat exchanger comprising at least one set of channels having a proximal end and a distal end, the set of channels comprising: a first channel defined by a first skin and a wall; and a second channel defined by a second skin and the wall, wherein the wall located between the first channel and the second channel comprises a first at least one aperture to allow fluid to pass through the wall from the first channel to the second channel.

Abstract: Disclosed is a baffle (40) for locating in a tank (16) for containing liquid. The baffle (40) comprises: a baffle wall enclosing an internal cavity (48); and one or more openings (50) in the baffle wall configured to permit the flow of a fluid between the internal cavity (48) of the baffle (40) and a volume external to the baffle wall. The baffle wall comprises an outer wall (42), and an inner wall (44) located within the outer wall (42). The outer and inner walls (42, 44) each comprise one or more openings. Each of the openings in the outer wall (42) is attached to a respective opening in the inner wall (44) via a respective opening side wall. The outer and inner walls (42, 44) are spaced apart to define therebetween a chamber (46).