Generator for absorption heat pumps
 An absorption refrigeration and heating system has helical concentric coils for two generators (80 and 81) and recuperators (86 and 95) on a common axis (232) with a heating unit (84) at the center and allowing the hot combustion gases (245) to circulate in serpentine fashion through separate concentric chambers containing the coils. An absorber (97), condenser (100) and recuperator (107) are placed in a single module (270) and configured with a tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat-transfer device (400) is used to reduce the pressure drop in the circulating fluid. 
Columbia Gas of Ohio, Inc.
F F F Y Y F
F28F F25B F28D Y02B Y02A F25B
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F. Bert Richard N. Stephen E. Kevin R. Howard C.
Cook Christensen Petty McGahey Meacham, Jr.