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Transient analysis of a thermal storage unit involving a phase change materialThe transient response of a single cell of a typical phase change material type thermal capacitor has been modeled using numerical conductive heat transfer techniques. The cell consists of a base plate, an insulated top, and two vertical walls (fins) forming a two-dimensional cavity filled with a phase change material. Both explicit and implicit numerical formulations are outlined. A mixed explicit-implicit scheme which treats the fin implicity while treating the phase change material explicitly is discussed. A band algorithmic scheme is used to reduce computer storage requirements for the implicit approach while retaining a relatively fine grid. All formulations are presented in dimensionless form thereby enabling application to geometrically similar problems. Typical parametric results are graphically presented for the case of melting with constant heat input to the base of the cell.
Document ID
19750032794
Document Type
Conference Paper
Authors
Griggs, E. I.
Pitts, D. R. (Tennessee Technological University Cookeville, Tenn., United States)
Humphries, W. R. (NASA Marshall Space Flight Center Astronautics Laboratory, Huntsville, Ala., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1974
Subject Category
ENERGY PRODUCTION AND CONVERSION
Report/Patent Number
ASME PAPER 74-WA/HT-21
Meeting Information
American Society of Mechanical Engineers, Winter Annual Meeting(New York, NY)
Distribution Limits
Public
Copyright
Other