This paper analyzes the behaviour of an absorption chiller lithium bromide installation fed by a field of flat-plate solar collectors and condensed by swimming pool water. A method of calculation in a variable regime is developed in terms of the obtained experimental results. Starting from the meteorological variables of a clear summer day and from the project data (collector normalization curve, collector and installation mass), the minimum solar radiation level necessary to initiate the process I(min), and the instantaneous available solar energy, Q(u) + W(l) is determined. The solar radiation threshold, I(min), necessary to obtain the process temperature, t(ave), in each instant, is obtained by adding to the corrected Klein radiation threshold, I(k,c), the heat capacity effects of the collector, HCE(CO), and of the installation, HCE(ins), as well as the losses of heat of the pipes to the surroundings, Q1. The instantaneous available solar energy, available useful heat, in addition to the wind collector losses to the surroundings, Q(u) + W(l), is the difference, in each instant, between the radiation, I(g/T), and the radiation threshold, I(min). The integration during the day of the instantaneous available solar energy allows us to calculate the daily available function, H(T). The value of H(T) measured in the swimming-pool water condensation installation reached 6.92 MJ/(m2 day). The calculated values of H(T) for a conventional installation condensed by tower water, or air, have been 6.35 and 0.56 MJ/(m2 day), respectively.
