>regulating controls incorporating semiconductor > >devices with a rated input current of more than 25 A per phase?. Would >this constitute a regulating control? The exclusion is ambiguous: is it the equipment that is rated at over 25 A/phase or the semiconductors? If equipment was meant, th...
The exterior temperature of solar plate collector can be increased by "special structure multi-glasshouse", and the environmental temperature can be higher than the water temperature in collector, then the collector will not deliver heat to environment, instead the heat will return to the collector ...
The theoretical rationale for the structural layout of a testing bench with zirconium dioxide heating elements on the basis of modelling radiative-conductive heat transfer are presented. The numerical simulation of radiative-conductive heat transfer for the two-dimensional scaled model of the testing segm...
The invention discloses a direct heating type testing method of high temperature resistance of carbon/carbon heating elements, comprising the following steps: 1. processing and manufacturing two graphite heads; 2. fixing the carbon/carbon heating elements on the two graphite heads; 3. sleeving a ...
Since the graphite components used in the latter case were not subjected to a high vacuum preannealing treatment, it can be assumed that some amount of water vapor (and other absorbed gases, e.g., hydrocarbons) was released in the initial stage of heating. Consequently, both primary and ...
water inside a spiral metal tube placed around the specimen. Thehot watercomes from the heating bath, situated outside the triaxial cell, flows through the tube around the specimen and finally returns to the heating bath. Acentrifugal pumpinstalled inside the bath imposeswater circulation. The ...
This standard covers a wide variety of heating and cooling equipment, from factory made packages to components of a field assembled system. UL50 and UL50E - Enclosures for Electrical Equipment - These standards cover the construction requirements for electrical enclosures, for mechanical strength and ...
–The loss of water through rapid evaporation, which can cause plastic shrinkage of fresh concrete. –Drying shrinkage and thermal cracking of the harden concrete. In addition to high concrete temperature, hot weather concreting is greatly affected by the ambient condition such as low humidity, wind...
elements. The viscoelastic response is represented by the Prony series invoking the time-temperature correspondence principle and employing the Arrhenius equation to define the shift factors. The viscoplastic flow rate is defined by a phenomenological model activated when the Frobenius norm of the deviator...
Water spray systems are applied for icing testing. Spacecraft testing – high-speed (Supersonic, Hypersonic, Hypervelocity) NASA rocket test wind tunnel Atmospheric entry wind tunnels or plasma wind tunnels characterize the aerodynamic behaviour and heating of materials and structures by entry simulation...