Abstract: A heat transfer plate for a plate heat exchanger including a number of ridges (210) and troughs (220) which have been pressed into the plate, the heat transfer portion of the plate having a plurality of juxtaposed rows (200) of the ridges (210) and troughs (220). The rows (200) of ridges (210) and troughs (220) are separated from each other by essentially plane channel portions (240). Each row (200) presents alternating elongated ridges (210) and elongated troughs (220) which extend along a main flow direction (F). The transition between each ridge (210) and an adjacent trough (220) in the same row (200) is formed by a transition portion (230) which is inclined relative to the central plane (P1) of the plate (1). The heat transfer plate is used in a plate pack for a plate heat exchanger.

Abstract: A plate pack for a plate heat exchanger comprises a number of heat transfer plates (100) having a number of through ports (110a-d, 120a-f), said plates (100) interacting in such manner, that the plates (100) between them form a first flow duct and a second flow duct and that the ports (110a-d, 120a-f) form at least one inlet duct and at least one outlet duct (110a-d, 120a-f; 230, 240; 330, 340; 630, 640) for each of the flow ducts. The inlet duct of at least the first flow duct comprises at least two primary ducts (110a-b; 230a-b; 330a-b; 630a-b), which are arranged to receive a fluid flow intended for the first flow duct, and at least one secondary duct (110c), which communicates via a flow passage with the primary ducts (110a-b) and the first flow duct and which is arranged to receive said fluid flow from the primary ducts (110a-b) and to convey this flow to the first flow duct.

Abstract: A heat transfer plate for a plate heat exchanger comprising a number of ridges (210) and troughs (220) which have been pressed into the plate, the heat transfer portion of the plate having a plurality of juxtaposed rows (200) of said ridges (210) and troughs (220). The rows (200) of ridges (210) and troughs (220) are separated from each other by essentially plane channel portions (240). Each row (200) presents alternating elongated ridges (210) and elongated troughs (220) which extend along a main flow direction (F). The transition between each ridge (210) and an adjacent trough (220) in the same row (200) is formed by a transition portion (230) which is inclined relative to the central plane (P1) of the plate (1). The heat transfer plate is used in a plate pack for a plate heat exchanger.

Abstract: A plate pack for a plate heat exchanger has a number of heat transfer plates (100) having a number of through ports (110a-d, 120a-f), the plates interacting in such manner, that the plates (100) form between them a first flow duct and a second flow duct and that the ports form at least one inlet duct and at least one outlet duct for each of the flow ducts, that the inlet duct of at least the first flow duct has at least one primary duct and at least one secondary duct. The primary duct and the secondary duct comiunicate with each other via at least one flow passage portion spanning a plurality of plate interspaces. The extension of the flow passage portion along the primary duct is substantially smaller than the extension of the primary duct. There is substantially no flow passage between the primary and secondary ducts outside the flow passage portion. A plate heat exchanger can have at least one plate pack of the above type.

Abstract: A plate pack for a plate heat exchanger comprises a number of heat transfer plates (100) having a number of through ports (110a-d, 120a-f), said plates interacting in such manner, that the plates (100) form between them a first flow duct and a second flow duct and that the ports form at least one inlet duct and at least one outlet duct for each of the flow ducts, that the inlet duct of at least the first flow duct comprises at least one primary duct and at least one secondary duct. The primary duct and the secondary duct communicate with each other via at least one flow passage portion spanning a plurality of plate interspaces. The extension of the flow passage portion along the primary duct is substantially smaller than the extension of the primary duct. There is substantially no flow passage between the primary and secondary ducts outside said flow passage portion. It is further described a plate heat exchanger comprising at least one plate pack of the above type.

Abstract: A plate pack for a plate heat exchanger comprises a number of heat transfer plates (100) having a number of through ports (110a-d, 120a-f), said plates (100) interacting in such manner, that the plates (100) between them form a first flow duct and a second flow duct and that the ports (110a-d, 120a-f) form at least one inlet duct and at least one outlet duct (110a-d, 120a-f; 230, 240; 330, 340; 630, 640) for each of the flow ducts. The inlet duct of at least the first flow duct comprises at least two primary ducts (110a-b; 230a-b; 330a-b; 630a-b), which are arranged to receive a fluid flow intended for the first flow duct, and at least one secondary duct (110c), which communicates via a flow passage with the primary ducts (110a-b) and the first flow duct and which is arranged to receive said fluid flow from the primary ducts (110a-b) and to convey this flow to the first flow duct.