Transient performance investigation of a space power system heat pipe
Start-up, shut-down, and peak power tests have been conducted with a molybdenum-lithium heat pipe at temperatures to 1500 K. The heat pipe was radiation coupled to a water cooled calorimeter for the tests with rf induction heating used for the input to the evaporator region. Maximum power throughput in the tests was 36.8 kw corresponding to a power density of 23 kw/cm/sup 2/ for the 1.4 cm diameter vapor space of the annular wick heat pipe. The corresponding evaporator flux density was approximately 150 w/cm/sup 2/ over an evaporator length of 40 cm at peak power. Condenser length for the tests was approximately 3.0 m. A variable geometry radiation shield was used to vary the load on the heat pipe during the tests. Results of the tests showed that liquid depletion in the evaporator region of the heat pipe could occur in shut-down and prevent restart of the heat pipe. Changes in surface emissivity of the heat pipe condenser surface were shown to affect the shut-down and re-start limits. 12 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5707982
- Report Number(s):
- LA-UR-86-1567; CONF-860612-6; ON: DE86011262
- Country of Publication:
- United States
- Language:
- English
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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
ALKALI METALS
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
HEAT PIPES
HEAT TRANSFER
LITHIUM
METALS
MOLYBDENUM
NESDPS Office of Nuclear Energy Space and Defense Power Systems
PERFORMANCE TESTING
POWER SUPPLIES
SPACECRAFT POWER SUPPLIES
TESTING
TRANSIENTS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
210600* -- Power Reactors
Auxiliary
Mobile Package
& Transportable
ALKALI METALS
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
HEAT PIPES
HEAT TRANSFER
LITHIUM
METALS
MOLYBDENUM
NESDPS Office of Nuclear Energy Space and Defense Power Systems
PERFORMANCE TESTING
POWER SUPPLIES
SPACECRAFT POWER SUPPLIES
TESTING
TRANSIENTS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE