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The BMS 599626 thickness of the finned dissipators is 7.5 mm with a fin height and thickness of 20.5 and 1.5 mm respectively and a fin spacing of 3.5 mm. The detail of the finned dissipators is in Fig. 4(a). They are made of aluminum and have four holes, one on each corner, to ensure the proper assembly of the TEUs to the chimney which is provided with homologous threaded holes. To make air circulate over the fins, four fans in total are present, two TEUs share the same fan. Each wind tunnel is disposed horizontally covering the two TEUs that are at the same level.
Fig. 4. Heat exchangers on the cold side, (a) finned dissipator and (b) heat pipe.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 4(b) presents the other kind of heat exchanger, the heat pipe. A heat pipe is a passive two-phase heat transfer device capable of transferring large quantities of heat with a minimal temperature drop. A classical heat pipe consists of a sealed container lined with a wicking structure [22]. The designed heat pipes have a total of 10 copper plated tubes of 350 mm of length, 8 mm of diameter and a spacing of 5 mm. The capillary system is heterozygous sinter and the working fluid water. Each tube can transport up to 61 W of heat. The condensation of the water is helped out with fins present at one end of the tubes. The fins are 130 × 55 × 0.3 mm3 and are provided with ten holes to host the tubes. The fin spacing is 3 mm. To help air circulate through the fins, one wind tunnel per heat pipe has been mounted at the prototype. Fig. 2 shows the complete TEG.