Accession Number : ADA122093


Title :   Analytical and Experimental Investigations of Sodium Heat Pipes and Thermal Energy Storage Systems.


Descriptive Note : Final rept. Oct 80-Sep 81,


Corporate Author : ARIZONA STATE UNIV TEMPE


Personal Author(s) : Jacobson,Dean


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA122093


Report Date : Jan 1982


Pagination or Media Count : 213


Abstract : Eight work elements for FY 1981 are reported on. A brief evaluation of the limits of arterial heat pipes is presented followed by the post life examination of two Inconel 600, sodium heat pipes which failed by pin hole corrosion through the evaporator. Nearly 12,000 hours of operation was sustained by one of the heat pipes prior to failure. A parametric test station for a thermal train including a 15-foot Inconel 617-sodium heat. A secondary sodium heat pipe with integral LiF thermal energy storage capsules and a sodium thermal transfer joint is discussed. A series of fifteen 18-in. long by 0.5 in. diameter Inconel 617, sodium heat pipes are being prepared for parametric and life tests. A 12-in. long, 1-in. diameter Inconel 617 container filled with the thermal energy storage salt 64LiF-30 MgF2-6KF was tested to determine latent heat of fusion (782 J/gm), melting point (710 C), freezing point (671 C) and diffusivity (0.00799 sq cm/sec) of the salt. The post life test results of a series of nine salt-Inconel 600 capsules, including LiF-MgF2, LiF-MgF2 -KF, and LiF-MgF2 NaF are presented. A 321 stainless steel, sodium heat pipe containing three LiF thermal energy storage units has a total of over 10,700 hours of operation and 3426 cycles of life testing.


Descriptors :   *THERMAL PROPERTIES , *ENERGY STORAGE , *HEAT PIPES , HEAT TRANSFER , PARAMETRIC ANALYSIS , CORROSION , TEST METHODS , SODIUM , HEAT EXCHANGERS , THERMAL CONDUCTIVITY , TEMPERATURE CONTROL , LIFE TESTS , FAILURE(MECHANICS) , FLUID FLOW , VAPORIZATION , NICKEL ALLOY INCONEL


Subject Categories : Energy Storage
      Air Condition, Heating, Lighting & Ventilating
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE