Journal ArticleDOI
Synthesis of an Electrical Power System for a Manned Lunar Base
J. E. Boretz,M. Koslover +1 more
TLDR
In this paper, an electrical power system using a state-of-the-art photovoltaic energy conversionsource was presented on the assumption that nuclear power system technology would not be flight ready by this time period.Abstract:
Current program planning in the area of lunar surface explorationenvisions missions of increasing energy requirements and duration.During the mid 1970's it has been estimated that the electrical powerrequirements for a 3-man mission of one year duration might be in theorder of 33 000 kWh. Load profiles to support regeneration of fuelcell reactants for lunar roving vehicles and base nighttime operationsindicate potential power levels of from 30 to 100 kW. An electricalpower system using a state-of-the-art photovoltaic energy conversionsource was postulated on the assumption that nuclear power systemtechnology would not be flight ready by this time period.The process of synthesizing an overall electrical power system isdiscussed. Included are analyses and system design rationale. A rangefrom 50 to 500 volts dc is considered and the effect on weight andefficiency determined. Additional system criteria such as thermalcontrol, reliability, and emergency operation are discussed. A shred-out oftotal system weight as a function of voltage and regulation is presentedfor a 36 kWload. The impact ofload level, conditioning efficiency,transmission length, and temperature on system weight is discussed. Sensitivityivity curves depicting the effect of variations in these parameters areprovided.It is concluded that an efficiency of 80 percent or greater can beattained by matching the load profile with distribution voltage.read more
Citations
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Proceedings ArticleDOI
Vacuum insulation on the moon
TL;DR: In this article, the authors present recent concepts and analysis on vacuum insulation issues in the lunar environment, including dust initiated breakdown, thermal management, gas contamination, and solar radiation effects.
Journal ArticleDOI
Computer-Aided Design and Weight Estimation of High-Power High-Voltage Power Conditioners
TL;DR: In this article, a computer program for estimating the weight of a high-power dc-to-dc power conditioner as functions of output power, operating frequency, input voltage range, maximum input voltage, and efficiency is described.
An Analog-Device-Based Five-Domain Control Method and Distributed System Configuration for High-Power Spacecraft Power Systems
TL;DR: In this paper , a communication-free distributed configuration for PCU interconnection system and a novel analog-device-based five-domain control method are proposed, and detailed control strategies and five working modes of the PCU subsystem are analyzed.
Journal ArticleDOI
Vacuum insulation for a lunar-based power system
L.B. Gordon,K.L. Gaustad +1 more
TL;DR: In this article, the authors discuss the problems in implementing large scale vacuum insulation in the lunar environment and discuss the advantages and disadvantages of several designs, including mass, size, and thermal management.
Journal ArticleDOI
An Analog-Device-Based Five-Domain Control Method and Distributed System Configuration for High-Power Spacecraft Power Systems
TL;DR: In this article , a communication-free distributed configuration for PCU interconnection system and a novel analog-device-based five-domain control method are proposed, and detailed control strategies and five working modes of the PCU subsystem are analyzed.
References
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Proceedings ArticleDOI
Lunar power systems.
F. Schulman,A. H. Smith +1 more
TL;DR: Lunar electric power systems transported by Saturn V noting the Brayton cycle, Rankine cycle, solar cells and thermoelectric systems were discussed in this article, where the authors showed that they were transported by a Saturn V.