日本建築学会環境系論文集
Online ISSN : 1881-817X
Print ISSN : 1348-0685
ISSN-L : 1348-0685
77 巻, 672 号
選択された号の論文の8件中1~8を表示しています
  • 屋外空間における感覚・心理評価と物理環境要素の関連 京都駅ビル大階段と下鴨神社を例として(その1)
    竹原 広実, 安岡 絢子
    2012 年 77 巻 672 号 p. 37-44
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    This study aimed to identify the sensory evaluations of two qualitative different open spaces. The following results were obtained.
    1) Results of thermal sensation for the Grand Stairway were similar to those obtained in previous experiments. In contrast, the spatial elements of Shimogamo-jinja alleviated the psychological load on thermal sensation.
    2) A correlation between brightness and illuminance was evident in Shimogamo-jinja. The brightness of the Grand Stairway seemed to be influenced by the brightness of the space.
    3) The high loudness was obtained by the subjects who had an impression in the sound of the place.
  • 山根 俊博, 西方 敦博, 水本 哲弥
    2012 年 77 巻 672 号 p. 45-53
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    Two types of wide-band electromagnetic wave absorber panel were developed for multipath interference reduction in urban communication systems. The characteristics were measured using mock-ups of the absorber panel with the time domain method. In this paper, an application of the developed absorber panel to digital television broadcasting and the influence of the difference between an actual absorber panel and mock-up on its performance are discussed. It is estimated that the area of communication disturbance is eliminated by applying the developed absorber panel. By experiments, it became clear that the several factors reduce the frequency range in which the reflection is suppressed below -14dB.
  • 空調用吹出口のCFDモデリングのための吹出気流データの整備とその適用(その1)
    長澤 康弘, 近藤 靖史
    2012 年 77 巻 672 号 p. 55-64
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    Computational Fluid Dynamics (hereafter, CFD) is one of the most useful techniques to predict the airflow distribution in air-conditioned and ventilated rooms. The previous studies show that the prescribed velocity method (hereafter, P. V. method) is effective to simulate complicated airflow from an air diffuser in CFD. However, the velocity distribution in the vicinity of the air diffuser as boundary conditions of coarse gird CFD using P. V. method can be affected by the airflow rate, the connecting conditions of the diffuser and supply air duct, and the buoyancy effect due to the temperature distribution.
    In this paper, the development of the versatile airflow data for P. V. method and the method for its application are discussed. In the first study, the unstructured fine elements CFD simulations under isothermal condition are carried out and the obtained airflow distributions of the system ceiling air diffuser are compared. The relationship between the airflow rate and the velocity near the diffuser, the influence of connecting conditions of the diffuser and air duct are confirmed by the comparison of CFD results. In the second study, the influence of the buoyancy near the diffuser is compared to the inertial force of discharged air on the basis of local Archimedes number obtained by the unstructured CFD simulations under non-isothermal condition.
  • 体臭による知覚空気汚染に関する研究 (その3)
    岩下 剛, 得永 尚樹
    2012 年 77 巻 672 号 p. 65-70
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    For determining VOCs emitted from bioeffluents, the indoor air collected in the classrooms of the elementary schools and a college were analyzed. As representative VOCs from bioeffluents, 2-Ethyl-1-Hexanol (2E1H), Nonanal, Decanal, Nonane, Undecane, and Dodecane were identified and quantified. The concentrations of 2E1H, Nonanal, Decanal, Nonane, Undecane, Dodecane in occupied classrooms were higher than those in unoccupied classrooms. There was a higher correlation between the concentration of 2E1H and the reciprocal of the ventilation rate per person under the occupied conditions. While the higher correlation was also obtained between the concentration of 2E1H and the in-door CO2 concentration in the classrooms, the concentrations of Nonanal, Decanal, Nonane, Undecane, and Dodecane did not correlate with the ventilation rate nor CO2. The 2E1H concentration could be an useful index of the air pollution by human bioeffluents.
  • -室内知覚空気質の向上に向けた建材臭評価方法の検討に関する研究 その1-
    金 鐘訓, 加藤 信介, 成 旻起, 高橋 祐樹
    2012 年 77 巻 672 号 p. 71-79
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    It is important to establish an evaluation method for odors emitted from building products for good perceived air quality. In Japan, there is no normative evaluation method, so we aimed to establish a quantitative and normative evaluation method on odor emissions from building products. Otherwise, ISO draft on evaluating building material odor has been proposed and is under investigation. In the ISO draft, perceived odor intensity and acceptability are suggested factors for the evaluation standard. In particular, perceived odor intensity is a parameter used to assess intensity based on a comparable scale. As smelling capability varies from person to person, the use of comparative sources, in which all panel members evaluate the sample air in comparison to the same references, reduces the influence of subjective perception of the test result. In this work, we measured perceived odor intensity, odor intensity and odor concentration of 5 kinds of building material. From these results, we investigated correlation among them.
  • CFDと連成した空調システムシミュレーションに関する研究 第2報
    近藤 順也, 飯塚 悟, 尹 奎英, 坂井 友香, 佐々木 美奈, 奥宮 正哉
    2012 年 77 巻 672 号 p. 81-87
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    A coupled analysis of CFD and HVAC system simulations was carried out to assess the mixing energy loss in an air-conditioned office room where heating and cooling operate in the perimeter and interior zones simultaneously. To evaluate the mixing energy loss, we conducted two simulations; one was the case with the airflow mixing between the perimeter and interior zones and the other was the case without the airflow mixing. By comparing the required coil loads between the cases with and without the airflow mixing, the mixing energy loss was estimated. The accuracy of the coupled analysis was assessed by comparing the results with those from an experiment by Ito (1988).
  • 熱負荷計算のための窓性能値に関する研究 第2報
    郡 公子, 石野 久彌
    2012 年 77 巻 672 号 p. 89-93
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    This paper proposed a practical calculation method of the solar shading performance changes for conventional windows with inner blinds or with blinds between panes. The solar shading performance indices such as the solar heat gain coefficient (SHGC) and the transmittance change depending on the profile angle as well as the solar incidence angle. In the proposed method, the solar radiation is split into two portions. One is the portion that transmits through the gaps between slats the other reaches slat surfaces. The transmittance and the inward heat flow of absorbed radiation into window components are calculated for each portion. The transmittance and the SHGC can be estimated with adequate accuracy and the proposed method is sufficiently practical to apply for building energy simulation programs.
  • 元 アンナ, 西尾 健一郎
    2012 年 77 巻 672 号 p. 95-104
    発行日: 2012/02/29
    公開日: 2012/03/07
    ジャーナル フリー
    The energy consumption for water heating accounts for approximately 20% of the CO2 emissions in the residential sector in Japan. Despite the high expectation of low CO2 emission, energy-efficient (EE) water heaters are not yet widely used. This study elaborates the cost-benefit of EE water heaters and derives the marginal abatement cost curve. We assume three cases; high efficiency without changing the energy source (case 1), high efficiency by shifting to electrification (case 2), and high efficiency by choosing the energy source (case 3). The result shows that CO2 emissions can be reduced by up to approximately 63% in the cases 2 and 3, whereas approximately 25% in the case 1. Moreover, the optimization analysis reveals the cost-effective breakdown of water heaters under the CO2 constraints. The larger the rates of CO2 emissions reduction are, the more the share of the EE water heaters, especially the share of CO2 refrigerant heat-pump-type water heaters remarkably increases.
feedback
Top