Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Development of an Experimental Methodology of Boiling Phenomenon in the Evaporator of a Glass Thermosyphon
Submission Author:
PAULO HENRIQUE DIAS DOS SANTOS , PR
Co-Authors:
Diógenes Oliveira de Souza, Ramaiana M. Davies, PAULO HENRIQUE DIAS DOS SANTOS, Thiago Antonini Alves
Presenter: Diógenes Oliveira de Souza
doi://10.26678/ABCM.COBEM2017.COB17-2089
Abstract
The use of solar energy has become popular since recent years as an alternative clean source of energy, especially on home environments heating. Solar collectors assisted by thermosyphons can enhance the heat transfer to the water which should be heated. A thermosyphon is a vertical sealed tube filled with a working fluid and is characterized, from bottom to top, by an evaporator, an adiabatic tube and a condenser region. Depending on the heat load and the fill charge ratio applied to the thermosyphon, vapor bubbles nucleate on the evaporator region and may grow and coalesce, pushing up the liquid phase and thus forming a two-phase liquid-vapor slug flow. The slug flow pattern is characterized by the intermittent succession of an elongated bubble and a liquid slug and it was experimentally observed occurring inside the glass thermosyphon setup here presented for different heat loads with 100% of water fill charge ratio of evaporator volume. An experimental procedure is presented for estimating the heat transfer coefficient related to the boiling phenomenon that occurs in evaporator of a glass thermosyphon.
Keywords
Glass Thermosyphon, Experiment, Boling Heat Transfer
