The inner-tube arrangement has an important impact on the performance of latent thermal energy storage heat exchangers, but effect spacing not been widely concerned. This study simulated numerically charging and discharging processes horizontal dual-inner-tube exchangers researched effects parameters exchangers. studied included phase change time material, rate, rate. results show, as increases...

Carburizing is the main damage form of ethylene cracking furnace tubes. In this process, microstructure tube would change and element diffuses redistributes. After serving for about 41000h, radiation section a plum blossom SC-1 tubular from petrochemical company was tested analyzed in article. Results show that higher service temperature, more serious carburizing tube. inner-wall carburized zon...

One of the main issues with the use of nickel titanium alloy (NiTi) implants in cardiovascular implants (stents) is that these devices must be of very high quality in order to avoid subsequent operations due to failing stents. For small stents with diameters below ca. 2 mm, however, stent characterization is not straightforward. One of the main problems is that there are virtually no methods to...

INTRODUCTION Transurethral laser surgery using a flexible multibackbone robot was recently demonstrated by Simaan et al. for bladder resection [1]. For transurethral prostate resection, thinner flexible manipulators are desirable. We have developed a hand-held system that transurethrally deploys two concentric tube robots through an 8.3 mm diameter rigid endoscope [2], as shown in Figs. 1 and 2...

Heat transfer enhancement in tubes is widely applied various industrial processes. The traditional method of heat to insert radial fins expand the internal surface area and destroy flow. However, there a flue gas corridor central tube, cost expanding inner fin high. A centrally symmetrical bent extruded aluminum was developed enhance tube. An experimental platform constructed test performance f...

The self-tightening technology of body tube is to apply a certain pressure in the inner bore so that corresponding residual stress generated tube, and can improve situation when it use extend its service life. Most existing research for large-caliber artillery are simplified thick-walled cylinder model, ignoring internal rifling chrome-plated processing factors, impact load on cracks stresses s...

Regenerative cooling using hydrocarbon fuel requires thermal decomposition to increase heat absorption, but a high temperature is required initiate and catalysis expected enhance at lower regime. The effects of on coking normal-dodecane methyl-cyclo-hexane within tube heater were experimentally investigated. Platinum (Pt) was spread the inner surface stainless tube, heated target values an elec...

ETCO2 increased to 45 mmHg. We could not pass a suction catheter beyond a distance of 24 cm from the entrance of the tracheal tube. Using a fibrescope, we could see the appearance of a meniscus and a crescent shape on the inner wall. Because of the prone position, we could not change the tube but managed to maintain ventilation, saturation and ETCO2 within the normal range by a change of ventil...

Citation Villalpando-Paez, F. et al. " Tunable Raman spectroscopy study of CVD and peapod-derived bundled and individual double-wall carbon nanotubes. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this acces...