Dimensionamiento de un intercambiador de calor para almacenamiento de energía térmica.

Abstract

Research about the use of renewable natural resources has been increased, since in the past the use of energy was not efficient because it presented some problems such as: the low energy density of the materials, the mismatch between supply and demand, and above all the loss of energy to the environment, etc. Therefore, based on these criteria, research shows, as an alternative, the use of thermal energy storage mechanisms, specifically latent heat thermal storage (solid to liquid), through the use of phase change materials or PCM. The objectives of this research are to select a low temperature PCM for thermal storage applications and to design a shell and tube heat exchanger. To achieve these objectives, an extensive literature review of PCM and heat exchangers was carried out, then the PCM and the heat exchanger were selected according to criteria and conditions corresponding to the cooling application and finally a shell and tube heat exchanger was sized. This resulted in a heat exchanger for storage 10 kW of power with the efficiency of 83% and the following dimensions: 2.4 m length and 1.7 m shell diameter, with 50 tubes of nominal diameter 6", for a cooling application for 8 hours with 1730,75 kg of isopropyl palmitate as the selected PCM.