In this paper an experimental study on single-phase natural circulation loops is presented. Several parameters such as loop inclination, and tube wall thermal conductivity (Plexiglas or Stainless-steel AISI-304) were systematically investigated. The experiments were conducted analysing the interaction between the pipe material and liquid properties as well as the inclination of the loop. For a wide range of power transferred to the liquid, different thermo-hydraulic behaviours were observed: - the stainless-steel/distilled water combination shows always stable behaviour, probably the higher thermal conductivity of stainless-steel causes the "extension" of the heated section in the lower heat source; at the same time, this can be interpreted as a virtual reduction in the distance between the heater and the cooler. This behaviour was observed for the most part of loop inclinations.
Some Considerations on the Interaction Between the Fluid and Wall Tube During Experiments in a Single-Phase Natural Circulation Loops
MISALE, MARIO;DEVIA, FRANCESCO;
2005-01-01
Abstract
In this paper an experimental study on single-phase natural circulation loops is presented. Several parameters such as loop inclination, and tube wall thermal conductivity (Plexiglas or Stainless-steel AISI-304) were systematically investigated. The experiments were conducted analysing the interaction between the pipe material and liquid properties as well as the inclination of the loop. For a wide range of power transferred to the liquid, different thermo-hydraulic behaviours were observed: - the stainless-steel/distilled water combination shows always stable behaviour, probably the higher thermal conductivity of stainless-steel causes the "extension" of the heated section in the lower heat source; at the same time, this can be interpreted as a virtual reduction in the distance between the heater and the cooler. This behaviour was observed for the most part of loop inclinations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.