Implementing theoretical and experimental model of a miniature wickless heat pipe performance

Abstract

This paper shows an experimental and numerical analysis of heat transfer (h.t) for wickless heat pipe (h.p) and a performance (perf.) optimization methodology to enhancement h.t for h.p. Firstly the study focuses on the perf. miniature sample under inclination angles of (0°, 45° and 90°) experimentally for each power input (2.5 , 5 , 7.5 ) watt, starting with 2.5 watt, then for 5 watt , etc. Water as a working fluid (w.f) for all cases. Secondly we focuses on h.t experimental results of a cooler part were performed and validated using numerical simulation by ANSYS FLUENT. The objective of this paper is to conduct a comparative study on h.p perf. with different input powers subjected to different orientations. The inclination of an h.p very important for its perf. . The effect of h.p orientation on the perf. of the entire system is disorganized due to the much higher thermal resistance (th.r) on the air side of the cooler part. The results shows that the 45°orientation provides best thermal execution. The best behaviour of the h.p be at (2.5) W through steady average temperature (temp.) of condenser during (0 º, 45 º, 90 º) tilt angles. Idealism inclination angle for h.p is (45°), and the thermal perf. of the h.p is at this tilt angle.

It observed from experimental readings and CFD simulation, the lowest pressure at lowest temp. Difference between heater and condenser sections.