BOILING HEAT TRANSFER PERFORMANCE SIMULATION DEVICE OF HEAT EXCHANGER USING MICRO FLOW PATH AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a simulation device that can calculate a rate of heat transfer in a micro flow path with high accuracy.;SOLUTION: A rate of heat transfer in any kind of conditions and desired to be calculated is input (S10), and physical properties of a coolant necessary for calculation is calculated based on input information (S11). Then, a temperature difference ΔT_sat between a wall temperature in a heat transfer pipe and the coolant is calculated by repetitive calculation till a total value q of each thermal flux q_lf, q_nb, q_fc transferred by each heat transfer component α_lf, α_nb, α_fc satisfies the conditions entered in S10 (S12). A rate of heat transfer (a) in a micro flow path based on ΔT_sat obtained is calculated (S13). A calculating method of each heat transfer component α_lf, α_nb, α_fc is described later. According to the present invention, an estimate expression of the liquid film evaporative heat transmission α_lf in the horizontal flow and the nucleate boiling heat transfer α_nb is corrected, and thereby a correlation expression with higher generality is made, and also the prediction accuracy is enhanced.;SELECTED DRAWING: Figure 7;COPYRIGHT: (C)2017,JPO&INPIT