Optimisation des paramètres de fonctionnement d’un plancher solaire direct (PSD)

Abstract

The objective of this work is the modeling and design of a solar heating system under floor whose energy supply is provided by a solar panel. The principle is to circulate directly in a thermally insulated concrete slab from the bottom which are embedded in the tubes, the water heated by a solar collector without intermediate storage tank. The strategy is to decompose the system direct solar floor into two subsystems easier to solve and then rebuild the global model taking into account the existing physical coupling between the sensor and the floor. The system is modeled after the nodal method, based on the heat balance of each element constituting the heating system (sensor, coolant, floor consisting of a concrete slab). The system of equations governing the thermal behavior of solar sensor is solved by the Runge-Kutta method of order 4 while solving the equations describing, the floor is covered by the finite differences method. A parametric study of the system studied is used to determine under dynamic diet the temperature changes in the various components of the system and to define the optimal characteristics of the installation. The comparison of our results with those from an experimental study conducted at the Center for the Development of Renewable Energies Bouzaréah (CDER. Algiers) shows a good agreement.