Method and apparatus for evaporating liquid from a product

A replaceable heat transfer module for use in providing thermal contact between a first heat transfer fluid and a working product, said first heat transfer fluid and said working product having differing temperatures, said replaceable heat transfer module comprising:

• (a) an inlet floodbox, said inlet floodbox comprising at least one inlet for said first heat transfer fluid, and a plurality of fluid distribution passageways for discharge of said first heat transfer fluid;
• (b) an outlet manifold, said outlet manifold comprising a plurality of fluid collection passageways for collection of said first heat transfer fluid, and at least one outlet for said first heat transfer fluid;
• (c) extending in a fluid tight relationship between said plurality of fluid distribution passageways and said plurality of fluid collection passageways, a thin, elongate evaporator envelope, said evaporator envelope comprising a lower flexible planar sheet and an upper flexible planar sheet, said upper flexible planar sheet and said lower flexible planar sheets each having inner surfaces located in a back-to-back spaced apart relationship, said evaporator envelope having (i) an upper end wherein said lower and said upper flexible planar sheets are fluidly sealed to said inlet floodbox, (ii) a lower end wherein said lower and said upper planar sheets are fluidly sealed to said outlet manifold, and (iii) a first edge portion and a second edge portion, at each of which said lower flexible planar sheet and said upper flexible planar sheet are fluidly sealed together.