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A STATISTICAL ANALYSIS OF TEMPERATURE OSCILLATIONS ON A FLAT-PLATE OSCILLATING HEAT PIPE WITH TESLA-TYPE CHECK VALVES

Scott Thompson, H.B. Ma
Frontiers in Heat Pipes (FHP) 2 - 033002 (2011)


Abstract


Steady-state, oscillatory temperature signals occurring on the wall of two flat-plate oscillating heat pipes (FP-OHP) – one with Tesla-type check valves and another without – were analyzed using statistical methods in order to quantify and determine oscillating behavior associated with flow rectification.  Using the Expectation-Maximization algorithm, a probability density function (PDF) governing the temperature signal was found to be multi-Gaussian and dependent on heat input and heat pipe region for both FP-OHPs investigated.  Results further indicate that the inherent flow rectification within the TV FP-OHP provides for an evaporator temperature signal with a less heat-dependent, higher-kurtosis PDF and, at higher heat inputs, a higher: Pearson correlation coefficient and Shannon entropy.  These results provide a unique means to quantify the pseudo-random feature of oscillatory temperature occurring on an OHP.


Full Text: PDF
DOI: http://dx.doi.org/10.5098/fhp.v2.3.3002

ISSN: 2155-658X