The authors have designed and realized an experimental test rig for the analysis of Closed Loop Two Phase Thermosyphons (CLTPT) of small dimensions where heat flow rate up to 1.7 kW can be furnished. The experimental test rig consists of an evaporator and a water cooled horizontal condenser placed about 1 m over the evaporator. The main characteristic of this apparatus is the presence of three different ways of measuring the mass flow rate: a continuous mode, an integral mode and an indirect mode. The purpose of this analysis is to investigate the correlation between mass flow rate and heat flow rate. The results of an experimental analysis by using water and ethanol as tested fluids at different operating conditions are shown discussed and analyzed. The influence of several parameters on the performances was studied experimentally: in particular heat load, operating pressure and fluid filling. The limits in the heat and mass transport are evidenced together with the unstable behaviour at the high heat input. From this work, understanding and useful information are provided for designingand building a two-phase thermosyphon for systems like solar heating.
|Autori interni:||FRANCO, ALESSANDRO|
|Autori:||FRANCO A.; FILIPPESCHI S.|
|Titolo:||Experimental analysis of Closed Loop Two Phase Thermosyphon (CLTPT) for energy systems|
|Anno del prodotto:||2013|
|Digital Object Identifier (DOI):||10.1016/j.expthermflusci.2013.08.013|
|Appare nelle tipologie:||1.1 Articolo in rivista|