Long-term drift of thermocouples at 1600 K

Thermal electromotive-force changes for 30 commercially available noble- and refractory-metal thermocouples have been determined in air, argon, and vacuum, at 1600 K for exposures up to 10,000 hours. Investigation techniques can serve as guidelines for future studies of other thermocouple systems

A new high temperature noble metal thermocouple pairing

Investigation has revealed reasonably oxidation resistant thermocouple pairing suitable for use in combustor gas streams at temperatures above 1873 K and at pressures above 20 atmospheres

Density functional theory of superconductivity in doped tungsten oxides

We apply density functional theory for superconductors (SCDFT) to doped tungsten oxide in three forms: electrostatically doped WO3, perovskite WO3−xFx, and hexagonal CsxWO3. We achieve a consistent picture in which the experimental superconducting transition temperature Tc is reproduced, and superconductivity is understood as a weak-coupling state sustained by soft vibrational modes of the WO6 octahedra. SCDFT simulations of CsxWO3 allow us to explain the anomalous Tc behavior observed in most tungsten bronzes, where Tc decreases with increasing carrier density. Here, the opening of structural channels to host Cs atoms induces a softening of strongly coupled W-O modes. By increasing the Cs content, these modes are screened and Tc is strongly reduced

Performance of mass flux probe in a Mach 3 stream

Performance of mass flux probe in Mach 3 strea

Miniature probes for use in gas turbine testing

Several examples of miniature probes (null type as well as fixed position) are presented which have proved useful in aircraft and space power systems component testing and are applicable to automotive gas turbine testing. These probes are used to determine component or system performance from the measurement of gas temperature as well as total and static pressure, and flow direction. Detailed drawings of the sensors are presented along with experimental data covering the flow characteristics over the range of intended use

San Antonio Condensate Collection and Use Manual for Commercial Buildings

Condensate is an inherent byproduct of building HVAC systems. Since condensate is formed from moisture in the air, it is relatively high-quality water. Therefore, it can be collected and used on-site with relatively little treatment. Using condensate conserves municipal water and lowers energy costs associated with the municipal collection, treatment, and distribution of water that would otherwise be consumed. Collecting condensate from commercial building heating, ventilation, and air-conditioning (HVAC) systems is relatively simple. Using condensate for on-site applications offers a potentially quick return on investment, especially in hot and humid climates. To help increase the implementation of condensate use, this manual was created as a guide for building managers, architects, engineers, and facility personnel to facilitate the comprehensive evaluation, design, and implementation of a condensate collection and use system for commercial buildings in San Antonio

Mobile Design Stations and Teaching Walls

A versatile, robust, and mobile design station can be economically constructed by integrating off-the shelf components with a clever custom framework. Ten such design stations are performing wonderfully in the new Center for Sciences and Innovation at Trinity University. Each unit supports the engineering design process from brainstorming and prototype design through construction and testing. The unit includes a permanent whiteboard, a removable white board, a flat-screen display, power outlets, data ports, storage (for tools, supplies, and student back packs) and a compartment to house electronic equipment hardwired into the unit. All this and a custom worktable for under $15,000. A similarly constructed teaching wall was created for under$18,000

Enthalpy and stagnation temperature determination of a high temperature laminar flow gas stream Patent

Measuring conductive heat flow and thermal conductivity of laminar gas stream in cylindrical plug to simulate atmospheric reentr