1,721,051 research outputs found
Experimental Thermal Diffusivities/Conductivities of Frozen Media through Stefan Problem Simulation
No full text
Isothermal Cavity at Low Temperatures, Working by a Heat Pipe.[UNA CAVITA ISOTERMA A BASSA TEMPERATURA, UTILIZZANDO UN TERMODOTTO.]
No full textAn isothermal cavity has been realized by a heat pipe having a radial structure, operative in a temperature range of 320-380 K, using water as working fluid, and a net of phosphorous bronze for the wick. Design data and results of the tests are reported for the effectiveness of the system when different and steady state conditions are present in external environment
Evolution rate of thermodynamic systems
Full text linkTime is absent in the common idea of classical thermodynamics; instead it is always ideally present considering work and heat exchanged or state functions change. In irreversible thermodynamic time seems to be considered and rate of change is introduced. Actually time is often not at the attention focus when searching for law to understand the system's evolution. A proposal to introduce the time in thermodynamics trough the classical Hamilton's principle, shows a possible interpretation of some process in an unified principle considering MaxEP and minimum evolution time for systems. At the same time it is evidenced that the irreversibility contribute to the slowing down of natural phenomen
L’impatto della pandemia da virus A/H1N1 sulla organizzazione del sistema sangue in Italia.
No full textModello matematico di collettore solare a doppia corrente
No full textTecniche e modelli di progettazione di un collettore solare piano a doppia corrente risolvendo i comuni problemi tecnici dei progettist
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