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Phase change energy storage for solar dynamic power systemsThis paper presents the results of a transient computer simulation that was developed to study phase change energy storage techniques for Space Station Freedom (SSF) solar dynamic (SD) power systems. Such SD systems may be used in future growth SSF configurations. Two solar dynamic options are considered in this paper: Brayton and Rankine. Model elements consist of a single node receiver and concentrator, and takes into account overall heat engine efficiency and power distribution characteristics. The simulation not only computes the energy stored in the receiver phase change material (PCM), but also the amount of the PCM required for various combinations of load demands and power system mission constraints. For a solar dynamic power system in low earth orbit, the amount of stored PCM energy is calculated by balancing the solar energy input and the energy consumed by the loads corrected by an overall system efficiency. The model assumes an average 75 kW SD power system load profile which is connected to user loads via dedicated power distribution channels. The model then calculates the stored energy in the receiver and subsequently estimates the quantity of PCM necessary to meet peaking and contingency requirements. The model can also be used to conduct trade studies on the performance of SD power systems using different storage materials.
Document ID
19950032526
Document Type
Reprint (Version printed in journal)
Authors
Chiaramonte, F. P. (NASA Lewis Research Center Cleveland, Ohio, United States)
Taylor, J. D. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Space Power - Resources, Manufacturing and Development
Volume: 11
Issue: 3-4
ISSN: 0883-6272
Subject Category
SPACECRAFT PROPULSION AND POWER
Distribution Limits
Public
Copyright
Other