日本建築学会環境系論文集
Online ISSN : 1881-817X
Print ISSN : 1348-0685
ISSN-L : 1348-0685
78 巻, 689 号
選択された号の論文の8件中1~8を表示しています
  • 李 孝珍, 上野 佳奈子, 坂本 慎一
    2013 年 78 巻 689 号 p. 543-550
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    On the evaluation of speech privacy, speech intelligibility tests are useful. However we focused on degree of personal information protection that is rated intuitively by user in real space. In this report, we tried to evaluate the degree of personal information protection and those results are compared with those obtained from two kind intelligibility tests; a word intelligibility test and a sentence intelligibility test. The tests were conducted in an anechoic room with a three dimensional sound simulation system to reproduce the transmission properties of two kind actual rooms. From the conducted tests, it was clarified that the results of two intelligibility test show high relationship with the degree of personal information protection. The correlation between the degree of personal information protection and the sentence intelligibility test score was higher (R2=0.94) than that with the word intelligibility test score.
  • フスティム ムラリア, 藤本 一寿
    2013 年 78 巻 689 号 p. 551-559
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    The object of this paper is to propose travel demand management (TDM) and traffic management system (TMS) strategies in order to mitigate the road traffic noise (RTN) in Makassar City, Indonesia. The TDM-TMS strategies involve three in one car, two in one motorcycle, prohibition horn sound, and Bus Rapid Transit. The ASJ RTN-Model 2008 is used to predict the RTN and GIS is applied to evaluate the effectiveness of various TDM-TMS scenarios as well as the present condition. The results show the TDM-TMS strategies as a noise measure provide noise reduction of about 6dB, and it is significant and sufficient effectiveness in reducing the RTN in Makassar. The authors wish that the results of this study give a suggestion for transportation policy to reduce the RTN in the future in Makassar City.
  • 吉田 有里, 鉾井 修一, 小椋 大輔
    2013 年 78 巻 689 号 p. 561-567
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    In Southeast Asia, many monuments made from stone or brick deteriorate due to physical and biological causes. This degradation is significantly affected by moisture migration and accumulation in the monuments. In this study, a big Buddha in Sukhothai (Thailand) was investigated. Numerical simulations of heat and moisture transfer and storage in the Buddha were performed. The time profile of the evaporation rate from the Buddha surface was calculated, and the relationship between the evaporation rate and discoloration of the Buddha surface was examined. A possibility was shown that the constituent of the plaster or brick transported from the inside to the surface of the Buddha with water movement caused the discoloration.
  • 鉛直方向の風の道を活用する街区形態のシミュレーション検討 (その1)
    加藤 隆矢, 飯塚 悟
    2013 年 78 巻 689 号 p. 569-577
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    Recently, vertical ventilation paths are receiving considerable attention as promising countermeasures to hot environment in summer. Vertical ventilation paths channel cooler upper winds into city blocks by using vertical turbulent diffusion enhanced by the vertical heterogeneity of building shapes. However, their effectiveness is limited because the temperature of the flow gradually becomes higher and the momentum of the flow for vertical ventilation paths gradually decreases. In this study, we investigated the effects of introducing vertical ventilation paths in city blocks by using CFD simulations. We examined the effects of the vertical heterogeneity of building shapes in the windward region on the thermal and wind environments in both the windward and leeward regions based on a heat balance analysis, space-averaged temperatures, and a proposed evaluation method using the turbulent kinetic energy profile.
  • マイクロスケール大気汚染予測システムの開発 その4
    菊本 英紀, 大岡 龍三, 高橋 岳生, 林 鍾衍, 伊藤 一秀
    2013 年 78 巻 689 号 p. 579-588
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    We conducted an experiment and large-eddy simulation (LES) of the dispersion of an inert gas in a test chamber which modeled the urban street canyon. In LES, the subgrid-scale variance (SGSV) of the pollutant concentration is omitted by the filtering operation. To evaluate it, we introduced a transport equation of SGSV and solved it with other governing equations. Concentration fluctuations which accounted SGSV showed good agreement with results in the experiment except the near-source region. A budget analysis of the transport equation found the local non-equilibriums of SGSV and difficulty of the zero-equation formulation of SGSV in the canyon.
  • 柳 宇, 鍵 直樹, 大澤 元毅
    2013 年 78 巻 689 号 p. 589-593
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    Seven steps of mould multiplication index (MMI) corresponding to the growth characteristic of the mould on the surface of building materials were proposed. It is well known that there are some stages of formation and growth on hyphae and spores in multiplication of mould. Moreover, since different microbial volatile organic compounds, which is represented by the mould growth characteristics, emitted in each stage of mould multiplication, the valuation method reflecting this growth characteristic is important. Until now, the almost methods were evaluating the growth state of mould by a microscope and naked eye, and these valuation methods are not the things corresponding to the growth characteristic of mould. By this study, it became clear that multiplication of mold follows a logistic curve as a result of the valuation using the mold growth index proposed.
  • コジェネレーション排熱利用バッチ式デシカント外気処理システムの開発 (その2)
    朴 炳龍, 李 時桓, 加藤 信介, 市川 徹, 工月 良太
    2013 年 78 巻 689 号 p. 595-604
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    The central thrust of this study involves developing a new desiccant-based energy recovery system useful for effective humidity control and featuring integrated design and analysis. The system heat source uses unutilized energy, heated water from solar panels and cool water from cooling towers. It consists of two air-water heat exchangers with adsorbent material coated on the fins and employs directly-heated desorption or directly-cooled adsorption for absorbent material created from the effective reuse of adsorbent materials. This paper describes the adsorption/desorption characteristics and performance of the air-water heat exchanger using the coating absorption material. Measurements involving the moist air being passed into the air-water heat exchanger via the coating of adsorbent material were conducted under various conditions. Consequently, the air-conditioning performance of the proposed system was found to be strongly dependent on the water temperature under constant air condition. The operating cycle of the system was also determined. The measured results make efficient use of the basic data from the numerical analysis model.
  • 島本 裕子, 村川 三郎, 西名 大作, 青野 政信, 宇草 和義, 花園 新太郎
    2013 年 78 巻 689 号 p. 605-612
    発行日: 2013/07/31
    公開日: 2013/09/05
    ジャーナル フリー
    All electric cooking equipments have been propagated in the center of providing school lunch. However, the ventilation rates of the facilities are well planned with the same criterions applied for the facilities equipped by gas combustion cooking ranges because we do not have definite planning standards on the ventilation rates.
    The purpose of this study is to clarify the possibility of the ventilation rate reduction in the cooking room of an actual center of providing school lunch. First, by the comparison between the results of the experiments and the CFD analyses in summer, the applicability of CFD analysis was confirmed. Second, based on the comparison among the results of the CFD analyses in case of the various ventilation rates included 20 times per hour as the initial value, the ventilation rate can be reduced 30%, 20% and 50% of the initial value in summer, winter and middle season, respectively.
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