Preliminary results of a 7kW single-effect small capacity preindustrial LiBr-H_2O air-cooled absorption machine

摘要

The aim of the paper is to describe the thermal design of an own-developed pr-industrial absorption machine of small capacity, single effect configuration using LiBr-H_2O as working fluid and air-cooled, and then evaluating the preliminary operational results, i.e. the performance and the cooling capacity. This chiller is conceived for low temperature heat sources, e. g. , solar cooling or waste heat. A mathematical modelisation under transient condtions of the single-effect LiBr-H_2O - air-cooled absorption chiller has been developed. Thisis very valuable to predict the thermal behaviour of the absorption machine and their interaction with the other components and, therefore for defining its control strategy. Numerical results are obtained and the validation is performed against experimental data, due to there are dependences with some empiric parameters. The numerical model to simulate the thermal and fluid dynamical behaviour of the absorption machine has been implemented using the NEST platform (object-oriented numerical tool).