For better heat and mass transfer , which configuration of heat exchanger is best in adsorber bed for adsorption refrigerator/chiller.
generally higher surface to volume represent a better heat exchanger.
I think the compact heat exchangers are good for adsorption refrigeration beds. The grain activated carbon can insert between the heat exchanger fins, and the hot water passes through the pipes.
Reynolds number of 2×103 to 100×103, the heat transfer enhancement ratios over Dittus-Boelter equation for internal finned tubes are typically in the range of 1-6, tubes with twisted tape and other inserts are 1.5-6, corrugated tubes are1 to 3 and dimpled tubes are 1 to 4, including compound enhancement techniques. The friction factor increased ratio over Blasius equation is normally in the range of 1.5-14 for internally finned tubes, 2-200 for inserted twisted tapes and swirl generators, corrugated tubes is 1.5 to 10 and dimpled tubes is 1 to 8.
Shell and tube exchanger has relatevely the best heat exchanging rate form contact surface area,thermal mass flow rate and configration point of view. However the effect of design style of chiller has certain effects and this may be taken into consideration.
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