Comparison models of the operation of absorption machines using the characteristic equation

Abstract

The integration of absorption machines in micro-trigeneration systems based on micro gas turbines is one of the most viable options for the use of waste gases from micro-turbines, increasing the energy efficiency of the systems, for which the analytical model proposed by the authors is used (Malinowski & Lewandowska, 2013) and (Wang, Cai, & Zhang, 2004), which was reproduced, tested, modified and extended to gas micro-turbines with different power ratings but of the same type, this model is used to heat the activation fluids of the absorption chillers used in these systems, directly influencing the behavior of the chillers according to the load and operating conditions of the micro-turbines, This makes it necessary to develop and apply models of the absorption chillers, with the aim of analyzing the degree of influence that micro-turbines operating at partial load have on the absorption chillers. For this reason, the model selected to obtain the performance of the chillers must be a simple model capable of predicting the behavior of the chillers based on the information from the external currents of the chillers. In the literature, there are a large number of studies focused on the development of absorption chiller models with experimental validation, which take into account specific characteristics of the machine with a greater or lesser degree of detail; this type of model and the literature review.