摘要

One of the simplest solutions to ensure the thermal control of a hermetic reciprocated refrigeration or heat-pumping compressor is related to the loop thermosyphon application. This paper presents experimental data obtained for two loop thermosyphons, one with capillary structure and the second without it. These thermosyphons are prime candidates for small hermetic compressor cooling solution to replace typical oil-cooled and air-cooled systems, where commercially available heat exchangers cannot be used due to high power and transport length limitations. The performance characteristics of two loop thermosyphons are discussed: (a) with a vertical flat evaporator (one of its heat-loaded walls has a sintered powder coating) and loop condenser, made from a minitube, cooled by the oil spray inside the compressor, and (b) with a horizontal minitube evaporator embedded into the copper plate, with two bendable transport lines and a flat condenser (chamber) with two finned heat sinks on its surface. Air is the cooling media.