CORRESPONDING STATES CORRELATION FOR MAXIMUM HEAT-FLUX IN 2-PHASE CLOSED THERMOSIPHON

A method is presented for the prediction of performance limit in two-p hase closed thermosyphon based on the thermodynamical corresponding st ates principle. Molecular weight, critical temperature, critical press ure and acentric factor are needed instead of thermodynamic and transp ort properties of fluid at a given temperature. Developed correspondin g states correlation for maximum heat flux is found to be in fairly go od agreement with the 436 experimental data for 12 nonpolar and polar fluids with fill ratio greater than 0.4 in vertical two-phase closed t hermosyphons with an inner diameter of 3-34 mm and the ratio of the ev aporator length to its diameter with values of up to 325. (C) 1997 Els evier Science Ltd and IIR.