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The experiment found that the very near surface of the lunar regolith, consisting of a few centimeters, was dominated by the radiative transfer of heat. This is primarily because the material is fairly loose, with limited soil particle contact reducing conductive transfer. [1] During the lunar noon, 70% of all heat transfer was radiative. [1]
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes.
As part of the AEC/USAF ANP program, in 1956 modified General Electric J47s were first operated on nuclear power using a reactor test assembly known as Heat Transfer Reactor Experiment 1 (HTRE-1). HTRE-1, which used vertically-oriented control rods, was reconfigured with a removable core to become HTRE-2 for additional testing.
"A review of some experiments which have been supposed to disprove the materiality of heat". Manchester Memoirs (V): 603. Hooke, R. (1705) [1681]. "Lectures of light". In Waller, R. (ed.). The posthumous works of Robert Hooke. Samuel Smith and Benjamin Walford. Leslie, J. (1804). An Experimental Enquiry into the Nature and Propagation of Heat ...
The more efficient heat transfer from the heated surface is due to heat of vaporization and sensible heat. Therefore, boiling heat transfer has played an important role in industrial heat transfer processes such as macroscopic heat transfer exchangers in nuclear and fossil power plants, and in microscopic heat transfer devices such as heat ...
The macroscopic energy equation for infinitesimal volume used in heat transfer analysis is [6] = +, ˙, where q is heat flux vector, −ρc p (∂T/∂t) is temporal change of internal energy (ρ is density, c p is specific heat capacity at constant pressure, T is temperature and t is time), and ˙ is the energy conversion to and from thermal ...
The program's Heat Transfer Reactor Experiments (HTRE) were conducted here in 1955 by contractor General Electric, and were a series of tests to develop a system of transferring reactor-heated air to a modified General Electric J47 jet engine.
The graphite, in addition to being the neutron moderator, also acts as a large thermal heat sink. The time lag of the heat transfer is on the order of 1 millisecond, much faster than the heat transfer to a liquid coolant flowing past fuel assemblies. Also, when the graphite is heated it creates a sizable negative moderator temperature coefficient.