International Space Station Alpha electric power system performance degradation

Cheng-Yi Lu; Lisa Hague; Vidya Padhye; Robert Hill

doi:10.1117/12.213560

7 July 1995 International Space Station Alpha electric power system performance degradation

Cheng-Yi Lu, Lisa Hague, Vidya Padhye, Robert Hill

Proceedings Volume 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials; (1995) https://doi.org/10.1117/12.213560
Event: Nondestructive Evaluation of Aging Infrastructure, 1995, Oakland, CA, United States

Abstract

Performance of the International Space Station Alpha (ISSA) United States On-Orbit Segment (USOS) Electric Power System (EPS) will be degraded through the mission life of the station. The power generation photovoltaic array and thermal control radiator will be directly exposed to the natural environment and the environment induced after the station is built. These environmental effects result in lower array current and voltage output as well as lower radiator heat rejection capability. Aging is the major cause for the energy storage nickel-hydrogen (NiH₂) battery performance degradation. Over time, there is an increase in the internal impedance, which results in a decreased efficiency as the battery ages. Design of the ISSA EPS takes into consideration the various equipment degradation modes, to make it compatible with the environments and to meet power, lifetime, and performance requirements.

Citation Download Citation

Cheng-Yi Lu, Lisa Hague, Vidya Padhye, and Robert Hill "International Space Station Alpha electric power system performance degradation", Proc. SPIE 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials, (7 July 1995); https://doi.org/10.1117/12.213560

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