Space Power Volume 9 Number 4 1990

Cover	1
Editors Page	2
Table of Contents	3
Lunar Waste Heat Radiator Design by Stephen Lord and Walter Venable	5
Summary	5
Introduction	5
Demand	5
Supply	6
Radiator Design	8
Low Imported Weight	8
Unaffected by the Day-Night Cycle	8
Optimized Heat Rejection	8
Ease of Maintenance and Operation	9
Radiator System Efficiency	9
Radiator Configurations	11
Vertical Radiator	11
Inclined Radiator	11
Horizontal Radiator	11
Horizontal Radiator with Vertical Sunshield	11
Horizontal Radiator with Active Horizontal Sunshield	13
Radiation Analysis	13
Manufacturing Techniques	15
Plate	15
Pipe Manufacturing	18
Layout	21
Mass Requirements	22
Water Inventory	22
Mass of the Radiator	22
Discussion	23
Research Needs	26
Conclusions	27
References	28
Factors Affecting the Selection of Parameters for Low Temperature Heat Pipes for Spacecraft Thermal Control by Prisnyakov, et al	29
Summary	29
Introduction	29
Experimental Research	29
Theoretical Investigations	30
Influence of Heat Pipe Construction Parameters	32
Power Density and Dynamic Heat Pipe Characteristics	34
Summarizing Remarks	35
Notation	35
References	37
On the Thermodynamics of the Conversion of Diluted and Undiluted Black-body Radiation by V Badescu	39
Summary	39
1. Introduction	39
2. Thermodynamics of Conversion	39
3. Upper Bounds Formulae for the Conversion Efficiency	41
Acknowledgement	44
References	44
On Innovation, Error and Space Exploration by Jesko Von WIndheim	45
Summary	45
Multi-megawatt Space Power Reactors by John Dearien and Judson Whitbeck	47
Summary	47
Design Requirements for Advanced Power Systems	47
Strategic Defence Initiative	47
NASA	48
Technology Issues	48
Microgravity Considerations	49
Spacecraft Related Considerations	49
Safety Related Considerations	50
Advanced Multi-megawatt Space Nuclear Power Concepts	51
Boeing	51
System description	51
Reactor	52
Turbine	52
Generator	52
General Electric	52
System description	52
Reactor	54
Turbine /generator	55
Westinghouse	57
System description	57
Reactor	58
Turbine	60
Generator	60
Grumman	60
System description	60
Reactor	61
Turbine	61
Alternator	61
General Atomics	61
System description	61
Reactor	63
Energy Storage Device	63
Rockwell	67
System description	67
Reactor	67
Turbine	67
Generator	67
Heat rejection	67
Summarizing Remarks	70
Statistical Analysis of Elliptical Keplerian Orbits, With Applications to Search and Surveillance Algorithms by Kitt Carlton-Wippen	71
Summary	71
I. Introduction	71
II. Analysis of Orbital Statistics, Distance from a Satellite to a Reference Sphere	76
III. Analysis of Orbital Statistics, Space Surveillance of a Spherical Surface	78
IV. Analysis and Optimization of Search Patterns for Lost Satellites	80
V. Summary	83
Acknowledgements	83
References	83
Bibliography	83
Appendix I. A Compendium of Radial Orbital Statistics	84
Appendix II. Sample Program for Calculating Optimal Search Pattern	84
An Evolutionary Path to Satellite Solar Power Systems by Geoffrey Landis	87
Summary	87
Introduction	87
Ground-based Photovoltaic Power	88
In-space Use of Beamed Power	89
Large-scale Space Infrastructure	90
Conclusions	92
References	92
Contents and Author Index Volume 9, 1990	95

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