new opportunity to realize heat transport system with multi-purpose apparatus, based on pulsating two-phase thermosyphon loops, is discussed. In these loops the heating fluid natural circulation is provided by auto fluctuations of vapor pressure during heat transfer from a heat source to a sink. The reference standard scheme of two-phase pulsating loops is described, joined with a mathematical model of heat and mass transfer processes. This model is based on the lumped capacitance mathematical method and resolve the equations of heat and mass rate in any elements of loop in unsteady conditions. The results of the numerical calculation are compared with some results of previous experimental researches collected on a basic scheme of the heat transport system. Opportunities of applications of multiloop heat-technology schemes, including at least one two-phase pulsating loop are offered and analyzed (pumpless vapor-ejecting refrigerating machine with pulsating working loop, pump heat action, heat supply system), allowing to use them for development of industrial heating and cooling systems with the exploitation of secondary and renewed sources of energy.
Overview of Two-Phase Pulsating Loops Application for Heating and Cooling Systems
FILIPPESCHI, SAURO;FANTOZZI, FABIO
2002-01-01
Abstract
new opportunity to realize heat transport system with multi-purpose apparatus, based on pulsating two-phase thermosyphon loops, is discussed. In these loops the heating fluid natural circulation is provided by auto fluctuations of vapor pressure during heat transfer from a heat source to a sink. The reference standard scheme of two-phase pulsating loops is described, joined with a mathematical model of heat and mass transfer processes. This model is based on the lumped capacitance mathematical method and resolve the equations of heat and mass rate in any elements of loop in unsteady conditions. The results of the numerical calculation are compared with some results of previous experimental researches collected on a basic scheme of the heat transport system. Opportunities of applications of multiloop heat-technology schemes, including at least one two-phase pulsating loop are offered and analyzed (pumpless vapor-ejecting refrigerating machine with pulsating working loop, pump heat action, heat supply system), allowing to use them for development of industrial heating and cooling systems with the exploitation of secondary and renewed sources of energy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
