Non-dimensional Analysis and Scaling Issues in Loop Heat Pipes

Parametric analysis of loop heat pipe operation: a literature review

“…From a detailed analysis of the evaporator wick presented by Mishkinis et al [41], the radial heat leak by conductive heat transfer across the wick is proportional to the effective thermal conductivity as long as the Peclet number is low. The Peclet number represents the relative magnitude of the convective to the conductive heat transfer and is given by:…”

Loop heat pipe performance enhancement using primary wick with circumferential grooves

“…Some features applied to improve LHPs thermal performance, such as microgrooves machined on the evaporator's inner diameter, have been reported earlier [12,13], which could be implemented in several other designs with a relative increase on the device's thermal performance [2]. Scaling the factors that can potentially affect LHPs performance have also been reported [14], which can lead to improving the thermal behavior of this device once implemented. However, details on the primary wick exact geometry and features that potentially increase LHPs performance are rare as this represents the most important component of the capillary evaporator itself.…”

Multi-Evaporator Miniature Loop Heat Pipe for Small Spacecraft Thermal Control

“…To obtain better understanding of fluid flow and heat transfer phenomena in an LHP and to provide a means of comparison and generalization of data between different LHPs, some scaling criteria are needed. In addition to the LHP analytical model, a set of dimensional and dimensionless groups has been developed to relate geometry and configuration of the LHP components, properties of the wick and the working fluid, and the environmental conditions surrounding the LHP [9]. raising the CC temperature at a desired temperature that is above the ambient temperature using the TECs so as to flood the evaporators with liquid, and then turning on the instruments.…”

“…In the following descriptions of test results, the effect of such data drop can be clearly seen. For clarity, the single power swap from 50Wl5W to 9 …”