Actas de congresos
Transient Numerical Model For Phase Change Thermal Storage System Analysis And Design
American Society Of Mechanical Engineers, Eep. Asme, United States, v. 26, n. , p. 2/ - , 1999.
A phase change thermal storage system of the vertical tube type is studied using a fixed grid numerical model. The solution of the system consists of solving the equations of the heat transfer fluid (HTF), the pipe wall and the phase change material (PCM) as one domain. The control volume finite difference approach described by (Patankar, 1980) is used to solve the equations describing the phase change thermal storage system. The SIMPLE scheme is used to solve for the pressure and velocity fields of the HTF. The radial temperature distribution, the phase change interface position and the latent and sensible heat accumulated along the system axial length are shown for different Reynolds and Stefan numbers, phase change temperature range and time periods. It is also shown in this paper the possibility of using the numerical model to solve problems with single temperature phase change. The results obtained are important parameters for PCM thermal system performance investigation and design.262/Bellecci, C.E., Conti, M., Phase change thermal storage: Transient behaviour analysis of a solar receiver/storage module using the enthalpy method Int. Journal of Heat and Mass Transfer, 36 (8), pp. 2157-2163. , 19992Cao, Y., Faghri, A., Performance characteristics of a thermal energy storage module: A transient PCM/forced convection conjugate analysis (1991) ASME Int. J. Heat Mass Transfer, 34 (1), pp. 93-101Jesus, A.B., (1998) Numerical Study of Solidification in Annular Geometry, , Master thesis, Universidade Estadual de Campinas (unicamp), Campinas, Brazil. (in Portuguese)Patankar, S.V., (1988) Numerical Heat Transfer and Fluid Flow, , McGraw-Hill, New York