Convegni ATI - Accesso riservato soci CTI

Autore: S. Paolucci, M. Sen

Collana: BT - 34 - Mag 06 - Energy: production, distribution and conservation

Note:
The absorption refrigeration cycle is the most widely used cycle today for chillers with a relatively low-grade and easy to obtain heat source. It makes use of a refrigerant/absorbent mixture to transfer heat in and out of the system. The main refrigerants used today are not environmentally friendly, and they yield a coefficient of performance that is relatively low. Ionic liquids are organic salts that have certain properties that make them friendly to the environment: they do not evaporate, they are not toxic, and they are stable as liquids over a very wide temperature range. In addition, they are able to dissolve gases, such as carbon dioxide, which makes them a potential candidate for use in absorption refrigeration. Preliminary calculations based on measured enthalpies of absorption of a carbon dioxide-ionic liquid mixture show this to be a viable possibility. However, thermodynamics and thermophysical properties values necessary for design are generally not available. It is necessary to make further measurements and calculations before a specific ionic liquid and a carbon dioxide absorption refrigerator system based on this can be built and tested.