Heat transport analysis in a district heating system applying waste heat from GTHTR300, a commercial design of high-temperature gas-cooled reactor

Kasahara, Seiji; Murata, Tetsuya*; Kamiji, Yu; Terada, Atsuhiko; Yan, X.; Inagaki, Yoshiyuki; Mori, Michitsugu*

Mechanical Engineering Journal (Internet), 3(3), p.15-00616_1 - 15-00616_16, 2016/06

http://doi.org/10.1299/mej.15-00616

A district heating system for household heating and road snow melting utilizing waste heat from GTHTR300, a heat-electricity cogeneration design of high temperature gas-cooled reactor, was analyzed. The application area was Sapporo and Ishikari, cities with heavy snowfall in northern Japan. The heat transport analyses were performed by modeling components to estimate heat supply profile; the secondary loops between the GTHTR300s and the heat-application area; heat exchangers connecting the secondary loops to the tertiary loops of the district-heating pipes; and the tertiary loops between the heat exchangers and houses and roads. Though double pipes for the secondary loops were advantageous for having less heat loss and a smaller excavation area, these advantages did not compensate for the higher construct cost of the pipes. To satisfy heat demand in the month of maximum requirement, 520-529 MW of heat were supplied by 3 GTHTR300s and delivered by 6 secondary loops, 3,450 heat exchangers about 90 m long, and 3,450 tertiary loops. Heat loss to the ground from the tertiary loops comprised 80%-90% of the heat loss. More than 90% of the construction cost went into thermal insulators. The thickness and properties of the thermal insulator must be reevaluated for economical heat delivery.

Design of micro-fission chambers for ITER low power operations

Nishitani, Takeo; Yamauchi, Michinori*; Izumi, Mikio*; Kusama, Yoshinori

JAERI-Tech 2005-047, 34 Pages, 2005/09

JAERI-Tech-2005-047.pdf:6.75MB

no abstracts in English

Stiff temperature profiles in JT-60U ELMy H-mode plasmas

Mikkelsen, D. R.*; Shirai, Hiroshi; Urano, Hajime*; Takizuka, Tomonori; Kamada, Yutaka; Hatae, Takaki; Koide, Yoshihiko; Asakura, Nobuyuki; Fujita, Takaaki; Fukuda, Takeshi*; et al.

Nuclear Fusion, 43(1), p.30 - 39, 2003/01

https://doi.org/10.1088/0029-5515/43/1/304

The stiffness of thermal transport in ELMy H-modes is explained in a series of carefully chosen JT-60U plasmas, and measured temperature are compared with the predictions of several transport models. A heating power scan with constant Tped, a scan of pedestal temperature Tped with constant heating power, and an on/off-axis heating comparison are presented. Predictions of the RLWB and IFS/PPPL models generally agree with the measured temperature outside 0.3, but the Multimode model uniformly predicts temperatures that are too high except in the central region.

ECRF experiments for local heating and current drive by fundamental O-mode launch from the low-field side on JT-60U

Ikeda, Yoshitaka; Ide, Shunsuke; Suzuki, Takahiro; Kasugai, Atsushi; Takahashi, Koji; Kajiwara, Ken; Isayama, Akihiko; Oikawa, Toshihiro; Hamamatsu, Kiyotaka; Kamada, Yutaka; et al.

Nuclear Fusion, 42(4), p.375 - 382, 2002/04

https://doi.org/10.1088/0029-5515/42/4/301

no abstracts in English

Stability of EB zonal flow in electron temperature gradient driven turbulence

Idomura, Yasuhiro; Wakatani, Masahiro*; Tokuda, Shinji

Physics of Plasmas, 7(9), p.3551 - 3566, 2000/09

https://doi.org/10.1063/1.1287418

no abstracts in English

Monte Carlo simulation of particle and heat transport in internal transport barrier

Hamamatsu, Kiyotaka; Takizuka, Tomonori; Shirai, Hiroshi; Kishimoto, Yasuaki; C.S.Chang*

Europhysics Conference Abstracts (CD-ROM), 23J, p.421 - 424, 1999/00

no abstracts in English

Particle and heat transports in the scrape-off layer of JFT-2M tokamak

Tsushima, Akira*; Uehara, Kazuya; Amemiya, Hiroshi*

Journal of Plasma and Fusion Research SERIES, Vol.2, p.81 - 84, 1999/00

no abstracts in English

Microencapsulated PCM slurry for heat transport media, 2; Effect of particle diameter on phase change behavior

Akino, Norio; Takase, Kazuyuki; Kubo, Shinji; *; *; *

Dai-31-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.589 - 591, 1994/00

no abstracts in English

Control of heat transport in heat pipes by magnetic fields

*; *; *; Ara, Katsuyuki

Journal of Applied Physics, 69(8), p.4925 - 4927, 1991/04

https://doi.org/10.1063/1.348202

no abstracts in English

Particle and heat transport during lower hybrid heating in JFT-2 tokamak

; ; ; ;

Journal of the Physical Society of Japan, 48(4), p.1333 - 1340, 1980/00

https://doi.org/10.1143/JPSJ.48.1333

no abstracts in English