Category: EuroSun2008-7

Operation temperatures

Fig. 10 shows the statistics of the driving temperatures. It can be seen, that in the heating mode driving temperatures below 68°C were also used. Unlike in the cooling mode, where the temperature in the buffer storage is used in order to decide whether high enough temperatures are available for operation, in the heating mode […]


G. Gutierrez*, P. Rodriguez, A. Lecuona, M. Venegas, J. Nogueira Universidad Carlos III de Madrid (UC3M). Departamento de Ingenieria Termica y de Fluidos. Avda.Universidad 30, 28911 Leganes, Madrid, Spain * Corresponding Author, glgutier@ing. uc3m. es Abstract An experimental facility applying the concept of adiabatic absorption has been designed and built in Universidad Carlos III de […]

The basic absorption model

Fig. 2 represents the thermodynamic states of the ideal simple effect absorption cycle, assuming mechanical, thermal and chemical equilibrium and assuming energy degradation exclusively concentrated on expansion valves. Steady state mass and energy balance in components yield the following equations: Evaporator (no superheating): Qm= m ref, K – h1); h1 = К (2) m ref, […]

Experimental setup

Two different sets of experiments were carried out to prove the advancements on the distribution system. 1. The objective of the first test is to determine the optimal size and number of discharge points distributed along the plastic tube. The optimized tube will serve the LD flow rate required by the application and ensure fairly […]

Basic absorption model vs. experimental results. Factors affecting the facility performance

Fig. 3 illustrates the comparison of experimental performance parameters with those obtained through the basic model, Eqs. (14) and (15), for 220 test points. The differences observed help identifying the influence of components performance, serving as a diagnosis. In the following, the causes of deviation from the ideal conditions are explained, evaluated and included in […]

Analysis of the results

The first set of experimental data for the distribution tube was analyzed by the factorial design analysis using MINITAB version 15. Factorial design analysis is a statistical method in which every level of one factor is tested in combination with every level of another factor. In general, in a factorial analysis, all possible combinations of […]