SEASONAL THERMAL ENERGY STORAGE WITH AQUEOUS SODIUM HYDROXIDE - REACTION ZONE DEVELOPMENT, MANUFACTURING AND FIRST EXPERIMENTAL ASSESSMENTS

摘要

In this paper, the theoretical and experimental investigation of the reaction zone construction of anrnabsorption/desorption concept with sodium hydroxide (NaOH) and water is described. Both heat and massrnexchangers – absorber/desorber (A/D) and evaporator/condenser (E/C) - constituting this reaction zone are falling film tube bundles working under reduced pressure (evacuated container). The different choices madernfor the construction of the reaction zone are outlined: the container as well as the manifold design, the vapourrnpathway with thermal radiation protection, the liquid level measurement cell and the tube bundle arerndescribed. After construction of the reaction zone, the work was focused on the first assessment of the A/Drnand E/C units in order to check their proper functioning. In this context, Helium leakage tests were carriedrnout for the different components and an optical setup enabling to check the efficiency of the manifold with arnsubstituted fluid is realized for the A/D unit.