NOVELTY - The plate (1051,1052) has front face that defines first heat exchange surface, and back face defines second heat exchange surface. An interior fluid passageway (1055) is formed between two faces to define a third heat exchange surface. A fluid outlet of passageway is provided with an outlet area that is different than inlet area of fluid inlet of passageway. A fluid channel of parallel fluid channels are configured to direct fluid in parallel from inlet to outlet, and to include transition point between fluid inlet and outlet at which number of fluid channels changes.    USE - Heat exchange plate of heat exchanger for transferring heat between fluids in ocean thermal energy conversion (OTEC) power plant.    ADVANTAGE - Since the fluid channel of parallel fluid channels are configured to direct fluid in parallel from inlet to outlet, the heat exchangers can provide enhanced heat transfer efficiency. Thus, enhances the efficiency of the OTEC heat engine, which uses a highly efficient thermal cycle for maximum efficiency and power production. The heat transfer in boiling and condensing processes as well as the heat exchanger materials and design, limits the amount of energy that can be extracted from each pound of warm water. Thus, the heat exchangers used in the evaporator and the condenser use high volumes of warm and cold water flow with low head loss to limit parasitic loads. Hence, the heat exchangers can provide high coefficients of heat transfer to enhance efficiency. The heat exchangers incorporate materials and designs tailored to the warm and cold water inlet temperatures to enhance efficiency. The heat exchanger design employs a simple construction method with low amounts of material to reduce cost and volume.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a manifold connector;    (2) a heat exchanger; and    (3) a method for assembling plate heat exchanger.    DESCRIPTION OF DRAWING(S) - The drawings show cross-sectional views of the heat exchanger array and portion of heat exchanger.    Top edge (1045)    Bottom edge (1046)    Left edge (1048)    Plates (1051,1052)    Interior fluid passageway (1055)