Pub Date : 2023-11-20DOI: 10.1252/kakoronbunshu.49.159
K. Takatsuka, Tomoichi Sato, K. Aburada, N. Okazaki
{"title":"Development of Methods for Project Schedule Delay Risk Analysis","authors":"K. Takatsuka, Tomoichi Sato, K. Aburada, N. Okazaki","doi":"10.1252/kakoronbunshu.49.159","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.159","url":null,"abstract":"","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"236 4","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139258423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-20DOI: 10.1252/kakoronbunshu.49.175
Yasuyuki Watanabe, Izumi Hirasawa
{"title":"Effect of Additive Cation on Promoting Nucleation of Latent Heat Storage Material Na2HPO4·12H2O","authors":"Yasuyuki Watanabe, Izumi Hirasawa","doi":"10.1252/kakoronbunshu.49.175","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.175","url":null,"abstract":"","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139255846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-20DOI: 10.1252/kakoronbunshu.49.166
Y. Ohira, Masayuki Sato, Masamitsu Shimadzu
{"title":"Cultivation of Blue–Green Algae, Spirulina platensis, in a Diluted SOT Medium with Adjusted Ion Concentration","authors":"Y. Ohira, Masayuki Sato, Masamitsu Shimadzu","doi":"10.1252/kakoronbunshu.49.166","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.166","url":null,"abstract":"","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"9 1-2","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development and Evaluation of Mixing Performance of New Type Large Paddle Impeller GD220","authors":"Riki Takahashi, Mai Iwata, Haruki Furukawa, Yoshihito Kato, Yoshikazu Kato, Takahiro Nemoto, Ken-ichi Ago, Seung-Tae Koh","doi":"10.1252/kakoronbunshu.49.114","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.114","url":null,"abstract":"通気撹拌用の大型2枚パドル翼GD220を開発し，撹拌所要動力，混合時間，通気動力を測定することによってその性能を評価した．GD220の動力数は，既存の大型パドル翼よりも小さく，同一の単位体積当たりの撹拌所要動力であれば回転数を増加させることが可能である．混合性能は同社の類似の大型パドル翼MR203と同等の性能だった．また，翼先端を後退させ，切り抜きを設けているため，通気撹拌の際，キャビティを形成しにくくなり，通気動力が低下しないことがわかった．","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136265914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of a Static <i>k</i><sub>L</sub><i>a</i> Measurement Method Using an Optical Dissolved Oxygen Sensor with Fast Response Time","authors":"Eiji Nagamori, Takashi Sato","doi":"10.1252/kakoronbunshu.49.142","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.142","url":null,"abstract":"kLa値（酸素移動容量係数）は培養槽のスケールアップ指標として広く利用されており，その測定には従来から複数種の測定法が用いられてきた．中でも静的方法は菌体培養を必要せず，測定条件を柔軟に変更でき，繰り返し測定も容易であるため非常に簡便である．一方で従来のガルバニ電池式溶存酸素センサーでは応答遅れが顕著で，実培養で使用されるような高いkLa値の培養条件の評価が不可能であった．今回，応答速度が顕著に速い光学式溶存酸素センサーを用いることで300 h−1以上の高いkLaが静的方法により測定可能であることを明らかにした．さらに全くの同条件（同一容器，同一撹拌条件など）にて各種のkLa測定法との相関付けを行った．","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136265908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-20DOI: 10.1252/kakoronbunshu.49.119
Satomi Todo, Hideki Tokanai
前報（Marui and Tokanai, 2021）では，粗大粒子を混入した撹拌槽内壁の熱伝達実験を行い，低Re域において粒子の槽底への堆積による伝熱の劣化を，また高Re域において粒子分散による熱伝達の促進を確認した．本研究では，この熱伝達の抑制を解消するべく，前報よりも混入させる粒子の体積分率を小さくし，直径を大きくした条件で実験を行った．その結果，低Re域では粒子の堆積が回避され，熱伝達が抑制されないことがわかった．一方，高Re域では直径の大きな粒子の撹乱効果によって熱伝達が促進された．さらに，前報で示したデータを含むすべての熱伝達係数は，前報で導出した相関式のパラメータを修正することで良好に表示できることを確認した．
在之前的报告(Marui and Tokanai, 2021)中，对混入大型粒子的搅拌槽内壁进行了热传递实验，在低Re区，通过粒子在槽底的沉积，可以降低传热。此外，还确认了在高Re区通过粒子分散促进热传递。在本研究中，为了消除这种对热传递的抑制，在使混入粒子的体积比例比先前报告更小、直径更大的条件下进行了实验。结果表明，在低Re区可以避免粒子堆积，不会抑制热传递。另一方面，在高Re区通过直径大的粒子的扰乱效果促进了热传递。另外，经确认，包括报告中所示数据在内的所有热传递系数均可通过修改报告中导出的相关公式参数，得到良好的显示。
{"title":"Enhancement of Side-Wall Heat Transfer in Solid–Liquid Agitation Tank by Addition of Large Particles","authors":"Satomi Todo, Hideki Tokanai","doi":"10.1252/kakoronbunshu.49.119","DOIUrl":"https://doi.org/10.1252/kakoronbunshu.49.119","url":null,"abstract":"前報（Marui and Tokanai, 2021）では，粗大粒子を混入した撹拌槽内壁の熱伝達実験を行い，低Re域において粒子の槽底への堆積による伝熱の劣化を，また高Re域において粒子分散による熱伝達の促進を確認した．本研究では，この熱伝達の抑制を解消するべく，前報よりも混入させる粒子の体積分率を小さくし，直径を大きくした条件で実験を行った．その結果，低Re域では粒子の堆積が回避され，熱伝達が抑制されないことがわかった．一方，高Re域では直径の大きな粒子の撹乱効果によって熱伝達が促進された．さらに，前報で示したデータを含むすべての熱伝達係数は，前報で導出した相関式のパラメータを修正することで良好に表示できることを確認した．","PeriodicalId":17698,"journal":{"name":"Kagaku Kogaku Ronbunshu","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136265920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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