Technology Overview of a Multi-Evaporator Miniature Loop Heat Pipe for Spacecraft Applications

A review of thermal performance in multiple evaporators loop heat pipe

“…13 shows the measured temperatures of 2E-2C LHP in a heat-load sharing test with E1 = 0W and E2 = 50W, which were also used to compare with the predicted results. The predicted results were computed by the analytical model earliest developed by Hoang and Ku [36] and later developed by J. Ku et al [7,16], which has been illustrated in Section 3. In Fig.…”

“…There are three LHP start-up scenarios based on the required superheat as shown in Fig. 14 [7]. When evaporator temperature rises above the CC temperature by a certain amount, vapor bubbles will generate in the evaporator and the LHP can start as shown in Fig.…”

“…(a) Heat load to both evaporators (b) Heat load to one evaporator Fig. 2 Schematic of dual-evaporators/dual-condensers LHP [6] The performance features of a DE-LHP were summarized by Ku et al [7]. The first feature is the fluid distribution of CC under normal operating conditions.…”

Heat Transfer and Flow Analysis in Loop Heat Pipe with Multiple Evaporators Using Network Model

“…Loop heat pipes have been used in various applications such as cooling systems for high-power electronic devices [1] and solar thermal collector systems [2]. Loop heat pipe with multiple evaporators has the advantage of design flexibility for the cooling systems of many heating devices and it has been used for spacecraft applications [3,4].…”

“…Nagano and Ku [12] reported the experimental results of thermal performance and capillary limit of heat transfer of a loop heat pipe with two evaporators by changing heat loads of evaporators and inclination of the heat pipe. Ku et al [3,4] reported the analytical and experimental results of the steady and transient thermal performance of a loop heat pipe with two evaporators and two condensers. Energy equations at about 1,300 nodes were solved using a finite-difference method.…”