{"created":"2023-07-25T10:23:31.881427+00:00","id":3212,"links":{},"metadata":{"_buckets":{"deposit":"548e7640-0027-40bf-b142-b7390d8099b6"},"_deposit":{"created_by":18,"id":"3212","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"3212"},"status":"published"},"_oai":{"id":"oai:air.repo.nii.ac.jp:00003212","sets":["590:973:974:1140"]},"author_link":["11056","11065"],"item_10006_alternative_title_32":{"attribute_name":"別タイトル","attribute_value_mlt":[{"subitem_alternative_title":"昼光の利用における窓に設置する採光装置による室内照度分布の改善に関する研究"}]},"item_10006_biblio_info_34":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2018-03-22","bibliographicIssueDateType":"Issued"},"bibliographic_titles":[{}]}]},"item_10006_date_granted_41":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2018-03-22"}]},"item_10006_degree_grantor_40":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"秋田大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"11401","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_10006_degree_name_39":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）"}]},"item_10006_description_27":{"attribute_name":"内容記述（抄録）","attribute_value_mlt":[{"subitem_description":"Lighting is always necessary during the operation hours from morning to night in an office building and generally, the amount of electric power consumed by lighting is about 20% to 30% of the total electric power consumption. Therefore, the positive effect of using daylight for energy saving in office, and the development of a system that utilizes daylight positively is attracting attention. When developing a lighting device in practice, the season, weather and many other factors have to be considered. For example, when using daylight, direct sunlight entering the room is often dazzling and cannot be used directly. And, in the case of Akita City, the solar altitude angle (the angle between the sunbeam and the earth plane) depends on the season, it is about 75°at noon of the summer solstice where the sun is the highest, while it is about 30°on the winter solstice. Furthermore, solar azimuth angle moves from east in morning to west in the evening. Due to this, the angle of light entering rooms from the windows also changes, which may affect the indoor lighting environment as well. In order to solve these problems, it is necessary to develop a window system using daylight combined with seasonal strong light shielding.\nIn this research, I have aimed to reflect the direct sunlight incident on the ceiling by attaching angle-changeable reflecting plates (blind-reflectors) to the window, and use the reflected diffused light from rough material of the ceiling for room lighting. In order to avoid dazzling daylight from the window and create a comfortable indoor environment, reflector angle that can be adjusted accordingly with changes in the solar angle of all seasons is needed and it is necessary to obtain the illuminance distribution of the work surface when designing the actual lighting. However, the angle of incident light from the window and the amount of incident light flux change gradually. In order to find out the illuminance distribution in various situations, it is necessary to spend enormous amount of time and cost in designing by performing actual measurements and calculation manually.\nTherefore, in order to reduce the time and cost to manually measure and calculate these illuminance distributions, a simulation of illuminance distribution using the Monte Carlo method was performed. In preparing the simulator, I made it possible such that lighting fixtures, rooms, windows and etc. can be freely set and installed. In addition, an illuminance distribution simulator was created that can display the illuminance distribution chart after calculating the reflector angle with sunlight. The function to simulate changes in solar angle depending on the season and time zone was also calculated. In this simulator, the Monte Carlo method was used because compared with other methods, it can reproduce the properties of light with higher precision on a computer, and calculate the illuminance distribution by simulating various conditions in the room desired for virtual space. However, in order to obtain excellent calculation results, enormous calculation time is required. On the other hand, in this study, by using a new Monte Carlo method for the photon flux generation method from lighting fixtures, fluorescent lamps of various shapes can be reproduced with a point light source, and the calculation speed of the illuminance distribution can be shortened with a simulator. First, the validity of the lighting fixture and the validity of the window by comparing the measured value and the simulation value was compared using this simulator. This method was used to investigate the illuminance distribution in the indoor space. From the simulation results, the indoor lighting environment when changing the solar angle and the reflector’s angle in the window was compared. And thus, the possibility of reducing the power consumption was testified.\nA model space of a typical laboratory of Akita University was considered in this research work and calculation of illuminance distribution was performed. These simulation works meet the indoor lighting standards described in 「Lighting standard JIS Z 9110: 2010」of the Japanese Industrial Standard (JIS). The sun angle used in the simulation was based on the solar altitude angle and solar azimuth angle at Akita University and the solar flux amount was also calculated from the measured values. In order to avoid problems such as sunset, this research used daylight in the time zone from 9:00 to 15:00 throughout the whole year. The illuminance distribution on the work surface was compared for the cases of with and without any reflectors installed in the window. From the results, one can understand that the lighting in the room was comfortable when the reflectors were installed in the window. And the effectiveness of the blind reflectors was also confirmed.\nIn the window system whereby reflectors were installed, the design of the reflectors is important. For example, when designing a reflector, if the width is too long, the daylight that can be reflected on the ceiling will be blocked, and the amount of light taken into the room will reduce. On the other hand, when the width of the reflector is too short, daylight illuminating the workplace through the reflectors will be too dazzling. In order to improve the practicality and performance of the reflector system, I have performed several simulation works to understand the dimensions of the blind reflectors and their installation process in a manner so that the highest amount of light is reflected on the ceiling. As a result, parameters such as the number of blind reflecting plates, length, distance, etc. were determined for real environment in order to get a better lighting system. In actual simulation, since comfortable lighting environment can be obtained, it is installed so that incident light can be reflected to the center of the ceiling. In this research, the JIS illuminance reference values was set as the target values, and by applying the knowledge of the change in the indoor environment due to the change of the position of the sunlight, the horizontal and vertical angle of the slat of the blind reflector was adjusted and the angles which satisfy the comfortable lighting environment under each environment was measured.\nFrom these results, the amount of energy saving which can be achieved by comparing power consumption when using daylight was examined. In the near future, by improving the window system with reflectors, better energy saving effect is expected which will contribute to a sustainable energy saving society.","subitem_description_type":"Other"}]},"item_10006_dissertation_number_42":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第1263号"}]},"item_10006_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.20569/00003572","subitem_identifier_reg_type":"JaLC"}]},"item_10006_publisher_28":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"秋田大学"}]},"item_10006_version_type_35":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"李, 承霖"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Li, Chenglin","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-06-14"}],"displaytype":"detail","filename":"kohakuyoushikou1263.pdf","filesize":[{"value":"262.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"内容要旨及び審査結果要旨","url":"https://air.repo.nii.ac.jp/record/3212/files/kohakuyoushikou1263.pdf"},"version_id":"89e06335-ccee-4ddb-b19e-c5e3bec6aa5b"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-06-27"}],"displaytype":"detail","filename":"kohakukou1263.pdf","filesize":[{"value":"11.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"本文","url":"https://air.repo.nii.ac.jp/record/3212/files/kohakukou1263.pdf"},"version_id":"6c39e1b7-d2b6-404d-b1d8-a4a01a8cd853"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Study on the Improvement of Interior Illumination Distribution by Using Lighting Equipment on Window in order to Use Daylight","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Study on the Improvement of Interior Illumination Distribution by Using Lighting Equipment on Window in order to Use Daylight"}]},"item_type_id":"10006","owner":"18","path":["1140"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-06-14"},"publish_date":"2018-06-14","publish_status":"0","recid":"3212","relation_version_is_last":true,"title":["Study on the Improvement of Interior Illumination Distribution by Using Lighting Equipment on Window in order to Use Daylight"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-25T11:24:26.425925+00:00"}