Methods and systems for turbulent, corrosion resistant heat exchangers

A two-way heat exchanger for transferring heat from a first liquid to a second liquid, comprising:

• a plurality of plate assemblies in a generally parallel arrangement defining a plurality of channels, each between adjacent plate assemblies, said channels alternating between first and second channels for separate flow therethrough of the first and second liquids, respectively,
• wherein each plate assembly comprises a support plate utilizing a mesh turbulator for mixing or turbulating liquid flowing through a channel defined said support plate and a support plate in an adjacent plate assembly and for setting a distance between the support plates, an inlet opening for flow of a liquid into said channel, an outlet opening for discharging liquid from said channel, and a seal structure for allowing passage of only one of said first and second liquids through said channel.

A heat exchanger for use in a desiccant air conditioning system, comprising:

• a plurality of membrane-plate assemblies facing each other in a generally parallel arrangement and being spaced apart to define air gaps therebetween through which air to be treated by the desiccant air conditioning system can flow, each of said membrane-plate assemblies comprising (a) a plate structure, and (b) two membranes, each facing an opposite side of the plate structure and spaced apart from the plate structure to define a gap therebetween through which a liquid desiccant can flow,
• wherein each plate structure includes a metal heat transfer pipe to transfer heat to or from the liquid desiccant, said metal heat transfer pipe encapsulated by a non-corrosive material to prevent corrosion of the metal heat transfer pipe by the liquid desiccant.