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ambient air system ASHRAE augmentation system average and worst average January wind Average Wind Velocity bentonite calculated collectable energy conductivity demand augmentation demand energy density determined Dodge City earth heat pipe earth heating systems earth temperature energy dissipated energy sources ergy face area freezing rain frozen precipitation gradients heat capacity Heat Capacity Ratio heat exchanger heat pipe field heat pipe system heat transfer Highway idealized surface installed cost January Average Wind January wind velocity Kw-hr Kw-hr/mē Madison number of heat operation pavement surface temperature Peak Power porous pipe precipitation events precipitation rate Reference resistance Section shown in Figure snowfall solar collectors solar energy Solar Radiation storage efficiency summer thermal diffusivity thermal energy three cities tubes unaugmented United vapor Virginia Heat Pipe W/mē weather West Virginia design West Virginia Heat West Virginia system wind energy wind machine wind power York City
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Page i - This document is available to the public through the National Technical Information Service, Springfield, Virginia 22161 19. Security Classif.
Page 100 - K is the thermal diffusivity expressed in units of length1/ time, and where k is the thermal conductivity, p is the density, and C is the specific heat.
Page i - No. 12. Sponsoring Agency Nome and Address 13. Type of Report and Period Covered National Aeronautics and Space Administration Washington, DC 20546 Technical Report 14.
Page 100 - Liquid limit — Water content, expressed as a percentage of the dry weight of the soil at which the soil passes from the plastic to the liquid state under standard test conditions.
Page 185 - Transient Heat and Mass Transfer in Soils in the Vicinity of Heated Porous Pipes, " Journal of Heat Transfer, Volume 99, November 1977 42.