Search

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Concave-convex plate heat exchanger is a new type of high efficiency heat transfer equipment, its enhanced heat transfer effect lies in its plate structure. In view of the incorporation of non-condensable gas will also affect the condensing heat transfer effect of steam in the heat exchanger, so the condensation characteristics of steam containing non-condensable gas in concave-convex plate heat exchanger are studied by numerical simulation. The control variable method is used to study the influence of non-condensable gas content, height, spacing and angle of concave-convex plate heat exchanger on condensing heat transfer through numerical simulation. The simulation results show that when the content increases from 0 to 30%, and the mass fraction of steam condensate water decreases by 41.05%. By analyzing the influence of different concave-convex plate parameters on the condensation heat transfer in heat exchanger, it is found that the mass fraction of steam condensate water increases with the distance between concave-convex platforms, and the angle of concave-convex platform decreases, and it increases first and then decreases with the height of concave-convex platforms. When the distance between concave-convex plate is 1.3 mm, the height of concave-convex plate is 4 mm, and the angle between concave-convex plate is 130°, the concave convex plate heat exchanger has the best heat transfer effect. [ABSTRACT FROM AUTHOR]

During a severe accident in nuclear power plant, if passive containment cooling system fails and other pressure relief measures are also useless, the mixed gas in containment can be injected into the spent fuel pool via a injector to reduce the risk of containment overpressure failure and the release of radioactivity to the environment. A aerosol pool scrubbing facility was built to study the factors influencing the effect of aerosol pool scrubbing under the injector. This facility can perform a great variation of experiments using various measurement tools. The aerosol concentration and particle size were monitored by using the spectrometer with a 20% measurement error. TiO2 powder was used as a stimulant for the aerosols in containment, and the mass median diameter ranged from 0.5 to 1.5 μm, the geometric standard deviation ranged from 1.63 to 2.15. According to the different characteristics of gas-liquid hydrodynamic behavior, the pool scrubbing process can be divided into two regions, including injection and rise zones. In the injection zone, with the flow flux increase, the gas regime changed from bubble (We

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)