evaporation current
1.Tests the operation status of an air-cooled heat pump air conditioner under defrosting conditions, and records the evaporation temperature and exhaust fan current at different voltages.
2.The demands on the broad ion sources for material modification are described. The kaufman gas ion sources and the Electron beam evaporation metal ion source (EBE) of high current are emphasised. The RF, ECR, as well as MEVVA sources are also introduced.
3.The results show that the exhaust fan current increases with frosting enhancement, while the increasing speed gets slower in the end of frosting, and the curves of current are slightly different at different voltages; that the evaporation temperature decreases with frosting enhancement, and the decreasing speed becomes increasingly faster; and that misoperation of defrosting can be avoided by using the intelligent defrosting control method based on exhaust fan current combined with evaporation temperature presented according to the experimental results.
4.The results showed that at the direct current of(DC) 400 V, the evaporation temperature of 1150 ℃,ambient pressure of 150 torr, gas flow of 50 SCCM, the CdS nano-ribbons with the size of 1-5mm×25μm×80nm can be easily obtained.
