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208. Effect of Header Configuration on Refrigerant Distribution in Parallel Flow Microchannel Evaporators

Author

Lü Hongbin (吕鸿斌), Liu Jinwei (刘金伟), You Dian (游典), Chen Jiangping, YU Dengjia (俞登佳), and Shi Junye

Subjects
geography, Multidisciplinary, geography.geographical_feature_category, Materials science, Microchannel, 020209 energy, ComputerApplications_COMPUTERSINOTHERSYSTEMS, 02 engineering and technology, Mechanics, Inlet, 01 natural sciences, 010305 fluids & plasmas, Insertion device, Refrigerant, 0103 physical sciences, Heat transfer, Header, 0202 electrical engineering, electronic engineering, information engineering, Two-phase flow, Evaporator
Abstract

The refrigerant flow distribution in the parallel flow microchannel evaporators is experimentally investigated to study the effect of header configuration. Six different configurations are tested in the same evaporator by installing insertion device and partition plate in the header to ensure the consistency of the other structure parameters. The results show that the uniformity of refrigerant flow distribution and the heat transfer rate are greatly improved by reducing the sectional area of header. The heat transfer rate can increase by 67.93% by reducing the sectional area of both inlet and outlet headers. The uniformity of refrigerant flow distribution and the heat transfer rate become worse after installing the partition plate in the insertion devices and changing the inner structure of the header further.

Published
2019

231. Generating and Evaluating Automatic Metadata for Educational Resources

Author

Liddy, Elizabeth D., Chen, Jiangping, Finneran, Christina M., Diekema, Anne R., Harwell, Sarah C., Yilmazel, Ozgur, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Rauber, Andreas, editor, Christodoulakis, Stavros, editor, and Tjoa, A Min, editor

Published
2005
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238. Revitalizing mouse diphyodontic dentition formation by inhibiting the sonic hedgehog signaling pathway.

Author

Mao, Chuanqing, Lai, Yongzhen, Liao, Caiyu, Chen, Jiangping, Hong, Yuhang, Ren, Chengyan, Wang, Chengyong, Lu, Meng, and Chen, Weihui

Subjects
CELLULAR signal transduction, REVERSE transcriptase polymerase chain reaction, DENTITION
Abstract

Background: Tooth regeneration depends on the longevity of the dental epithelial lamina. However, the exact mechanism of dental lamina regression has not yet been clarified. To explore the role of the Sonic hedgehog (Shh) signaling pathway in regression process of the rudimentary successional dental lamina (RSDL) in mice, we orally administered a single dose of a Shh signaling pathway inhibitor to pregnant mice between embryonic day 13.0 (E13.0) and E17.0. Results: We observed that the Shh signaling pathway inhibitor effectively inhibited the expression of Shh signaling pathway components and revitalized RSDL during E15.0–E17.0 by promoting cell proliferation. In addition, mRNA‐seq, reverse transcription plus polymerase chain reaction (RT‐qPCR), and immunohistochemical analyses indicated that diphyodontic dentition formation might be related to FGF signal up‐regulation and the Sostdc1‐Wnt negative feedback loop. Conclusions: Overall, our results indicated that the Shh signaling pathway may play an initial role in preventing further development of mouse RSDL in a time‐dependent manner. Key Findings: RSDL, Shh signal, tooth regeneration, Wnt/β‐catenin, mouse molar. [ABSTRACT FROM AUTHOR]

Published
2022
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