Preliminary Experimental Study on Geysering Phenomena in Heating System

The geysering phenomena is studied experimentally under several cases with different height of upper plenum,diameter of vertical column and heating power,to investigate the effects on the geysering phenomenon.According to the analysis of experimental phenomenon and data,it is found that the liquid pe-riodically boils and various flow patterns alternately occur in the heating system.The refilling of cooler liquid causes significant change of temperature and pressure in the system.The geysering phenomena is more obvi-ous under greater height of upper plenum,less diameter of vertical column and greater heating power.The effect of other system parameters on geysering requires further study in the future work.