Affordable Access

Publisher Website

Effect of operating temperatures on the coefficient of performance of active carbon-methanol systems

Heat Recovery Systems and CHP
Publication Date
DOI: 10.1016/0890-4332(88)90042-7


Abstract Experimental and predicted results of an active carbon (AC35)-methanol pair as a function of operating temperatures are discussed. Experimental COP's higher than 0.5 are obtained when the evaporating temperature lift is less than 25°C. The COP is seen to be very sensitive to the evaporating and adsorbing temperatures. The regenerating temperature is of the order of 100°C which makes that pair a good candidate for solar cooling applications. A comparison between the results obtained with that pair and predicted performances of three other pairs (NH 3H 2O, ZeoliteH 2O and another active carbon-methanol pair) shows that: 1. (1) two adsorber cycles give higher COP's than the NH 3H 2H 2O continuous cycle; 2. (2) intermittent adsorptive cycles give higher COP's than the NH 3H 2O continuous cycle as long as the evaporating temperature lift is less than 50°C; 3. (3) among the solid adsorbents, the active carbon-methanol pairs seem to be the most promising for cooling applications. The choice of the active carbon depends on the evaporating temperature lift: AC35 is very well adapted for temperature lifts larger than 30°C; ACLH could be better adapted to smaller evaporating temperature lifts, as suggested by Passos et al.

There are no comments yet on this publication. Be the first to share your thoughts.