Simulation d'une machine frigorifique à absorption fonctionnant avec des mélanges d'alcanes |
| |
Authors: | N Chekir Kh Mejbri A Bellagi |
| |
Affiliation: | U.R. Thermique et Thermodynamique des Procédés Industriels, Ecole Nationale d'Ingénieurs de Monastir, av. Ibn El Jazzar 5019 Monastir, Tunisie |
| |
Abstract: | We propose in this article an absorption chiller operating with binary alkane mixtures as an alternative to compression machines. It is an installation using low-level energy at a temperature below 150 °C (waste heat or solar energy) and operating with environmentally friendly fluids. Ten mixtures are considered and compared with two cooling mediums of the condenser and the absorber: the ambient air at 35 °C and the water at 25 °C. For an air-cooled chiller, the COP reaches 0.37 for the n-butane/octane system. This value remains 27% lower than that of an ammonia/water installation operating under the same conditions. For a water-cooling chiller, the n-butane/octane and propane/octane systems give a COP of about 0.63, which is comparable to that of the ammonia/water system. When n-butane is used as refrigerant, the machine works at a pressure under 5 bars, which is an advantage compared with machines working with ammonia/water mixtures. |
| |
Keywords: | Absorption system Propane Isobutane Pentane Heptane Hexane Design Modelling COPMots clé s: Systè me à absorption Propane Isobutane Pentane Heptane Hexane Conception Modé lisation COP |
本文献已被 ScienceDirect 等数据库收录! |