It is concluded for a standard energy saving fluorescent lamp of 26mm diameter with hot spot temperature of 1380K, the storage of the electron-emission material in each electrode must be no less than 7mg for life time of 8000 hours.
At initial start-up stage of catalyst,a few shut-downs have no obvious influence to characteristics of catalyst. High hot spot temperature test showed that the catalyst have good heat-resistant stability.
Using model number X avionics pod as a specific case, numerical calculation of the hot-spot temperature of the DIP was carried out, the results obtained have great value for the thermal design of the electronic components.
A numerical model of an electronic component i.e., a DIP, is created using the finite-element method. The steady temperature field of the DIP under different convection boundary conditions is studied, and the key factors influencing the hot-spot temperature and the way to improve the thermal character of the DIP are also studied.
The insulation life of a traction transformer is determined partially by hot-spot temperature and depends on the ability of the transformer to dissipate the internally generated heat to its surroundings.
The influence of some factors in preparation process,such as ratio of Mo to Fe,addition of Cr,Co and Bi,feed method in coprecipitation,as well as the property and the composition of carriers of catalysts, on the yield of formaldehyde and the hot point temperature of the reaction bed was discussed. on the basis of obtained results,three types of catalysts were prepared. By using these catalysts,the yield of formaldehyde reaches 85%～88%.
The Importance of hot point temperature monitoring online of transformer winding was introduced,a few kinds of measuring methods prevalent now of hot point temperature monitoring of transformer winding were analyzed and contrasted,a method that fiber optics grating temperature sensor sticks to the surfaces of windings to monitor temperature was presented based on the analysis mentioned above,and some concrete experimental data were gained.
The peak temperature of hot spot increases with the increase of furnace temperature. With the decrease of CH_(4)/O_(2) ratio,the peak temperature increases rapidly due to the high conversion of methane.
The model delivers the value of the insulation Hot-spot temperature, as the most critical quantity during transformer loading, and the value of the thermal ageing, both for variable load and variable ambient temperature.
Two problems exist in the on-line application of the model: unknown starting hot-spot temperature and variation in the thermal parameters in a long-term transformer operation.
Relieving Hot-Spot Temperature and Current Crowding Effects During Electromigration in Solder Bumps by Using Cu Columns
As the hot-spot temperature bootstraps upward, the reaction rate increases.
In contrast to this the calculated hot-spot temperature dependent on the actual loading is not rising.
The possibility of reconstructing a two-peak temperature distribution by the proposed method is demonstrated.
Effect of orientation on the peak temperature of the yield-stress anomaly in single crystals of the Ni3Ge alloy
Temperature dependence of the yield stress τc(T) and shear stresses, as well as the orientation dependence of the peak temperature Tp of the yield-stress anomaly have been studied on single crystals of the Ni3Ge alloy.
The peak temperature Tp corresponds to the maximum in the τc(T) dependence.
It is shown that in the case of the above equality it is possible to describe the orientation dependence of the peak temperature Tp of the temperature anomaly of the yield stress in single crystals of Ni3Ge.