HEAT TRANSFER ELEMENT ASSEMBLY

摘要

The thermal performance of the heat transfer element assemblies (40) for rotary regenerative air preheaters (10) is enhanced to provide a desired lev el of heat transfer and pressure drop with a reduced weight. The heat transfer plates (44, 48) in the assemblies (40) have spaced apart dimples (54, 56) fo r maintaining plate spacing and oblique undulations with the undulations (52) on adjacent plates preferably extending at opposite oblique angles. The dimples (54, 56) may be on every other plate (44, 48) and alternate between the two sides of the plates (44, 48) or they may be on every plate and all extend to the same side.