Abstract
An embedded heat pipe (HP) with dual driving forces for compact and efficient thermal storage application was designed in this paper. To understand the thermal performance of the dual driving force heat pipe (DDFHP) under different heat storage and release conditions, an experiment testing platform was constructed. The influence of heating mode, heating load, and filling ratio (FR) on the working stability, thermal resistance, and effective thermal conductivity of the DDFHP were investigated and analyzed. The results mainly showed that under the bottom heating condition of the DDFHP, the thermal resistance of the DDFHP decreases with increasing heating power when the FR is low, and it first increases and then decreases when the FR is high. Among all the tested heating powers, the thermal resistance can be reduced to as low as 0.039 °C/W. Under the simulated heating conditions of phase change material on the DDFHP, at the same heating power, the thermal resistance of the DDFHP decreases first and then increases with the increase of the FR when the liquid filling height is less than 130 mm. In this case, the optimal FR of the DDFHP is 15 %, and the thermal resistance can be as low as 0.1 °C/W. The present study contributes to future HP applications in thermal storage enhancement.
Published Version
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