An electrically heated microgroove vaporizer was proposed. The vaporizer mainly comprised an outer tube, an inner tubeand an electrical heater cartridge. Microgrooves were fabricated on the external surface of the inn...An electrically heated microgroove vaporizer was proposed. The vaporizer mainly comprised an outer tube, an inner tubeand an electrical heater cartridge. Microgrooves were fabricated on the external surface of the inner tube by micro-cutting method,which formed the flow passage for fluid between the external surface of the inner tube and the internal surface of the outer tube.Experiments related to the temperature rise response of water and the thermal conversion efficiency of vaporizer were done toestimate the influences of microgroove’s direction, feed flow rate and input voltage on the performances of the vaporizer. The resultsindicate that the microgroove’s direction dominates the vaporizer performance at a lower input voltage. The longitudinalmicrogroove vaporizer exhibits the best performances for the temperature rise response of water and thermal conversion efficiency ofvaporizer. For a moderate input voltage, the microgroove’s direction and the feed flow rate of water together govern the vaporizerperformances. The input voltage becomes the key influencing factor when the vaporizer works at a high input voltage, resulting inthe similar performances of longitudinal, oblique and latitudinal microgroove vaporizers.展开更多
基金Project(50436010) supported by the National Natural Science Foundation of ChinaProject(2005Z2-D0011) supported by the Key Program of Science and Technology of Guanzhou City, China
文摘An electrically heated microgroove vaporizer was proposed. The vaporizer mainly comprised an outer tube, an inner tubeand an electrical heater cartridge. Microgrooves were fabricated on the external surface of the inner tube by micro-cutting method,which formed the flow passage for fluid between the external surface of the inner tube and the internal surface of the outer tube.Experiments related to the temperature rise response of water and the thermal conversion efficiency of vaporizer were done toestimate the influences of microgroove’s direction, feed flow rate and input voltage on the performances of the vaporizer. The resultsindicate that the microgroove’s direction dominates the vaporizer performance at a lower input voltage. The longitudinalmicrogroove vaporizer exhibits the best performances for the temperature rise response of water and thermal conversion efficiency ofvaporizer. For a moderate input voltage, the microgroove’s direction and the feed flow rate of water together govern the vaporizerperformances. The input voltage becomes the key influencing factor when the vaporizer works at a high input voltage, resulting inthe similar performances of longitudinal, oblique and latitudinal microgroove vaporizers.
