Development of Oxygen Supply and Recovery System for Closed Environment in a Space -Approach to Low Power Consumption at Cultivating-

空间封闭环境供氧及回收系统的开发-培养低功耗的途径-

基本信息

批准号：
11650937
负责人：
ANDO Koji
金额：
$ 2.3万
依托单位：
Muroran Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

As a basic research for developing an Oxygen Supply system used photosynthesis of blue-green algae, Spirulina platensis, we investigated the possibility of power decreasing formed Spirulina Cultivated field, which used low centrifugal force, under microgravity. We observed a bubble behavior near the sidewall of vessel on the ground and under microgravity. In the results at 2000, it was found that the evaluation of a material surface, formation of slipping surface and the controlling of a bubble size and its frequency were the most important.Experiments on the ground :Contact angle was measured by liquid drop. In this work, we tested that contact angle was measured by bubble. We evaluated the characteristic of the various surfaces using this measurement value. We prepared the new surface that was more excellent than Teflon.Experiments on the ground :We established a controlling procedure of bubble size and its frequency by microgravity experiments at Hokkaido National Industrial Research Institute. We observed the bubble behavior near the sidewall of vessel under microgravity, which was created by Japan Microgravity Center. It was found that bubble behaviors were divided three patterns.(1) Air disperses in water and bubble does not contact on the sidewall.(2) Air does not disperse in water and large bubble contact on the sidewall.(3) Air does not disperse in Water and air layer forms on the sidewall.Each pattern corresponded to the value of the contact angle. Because we experimentally confirmed pattern (3), the possibility of power decreasing was proved by our procedure.

作为开发氧气供应系统的基础研究，使用了蓝绿色藻类的光合作用，我们研究了在微重力下使用低离心力的螺旋藻培养场降低功率的可能性。我们观察到在地面上和微重力下容器侧壁附近的气泡行为。在2000年的结果中，发现对材料表面的评估，滑动表面的形成以及气泡大小的控制及其频率是最重要的。在地面上进行了示例：通过液态滴来测量接触角。在这项工作中，我们测试了接触角是通过气泡测量的。我们使用此测量值评估了各种表面的特征。我们准备了比Teflon更出色的新表面。当地的经验：我们通过北海道国家工业研究所的微重力实验建立了气泡大小及其频率的控制程序。我们观察到由日本微重力中心产生的微重力下船只侧壁附近的气泡行为。发现气泡行为分为三种模式。（1）水和气泡在侧壁上没有接触。（2）空气不分散在水中，侧壁上的大气泡接触。（3）空气不在水中。在侧壁上散布在水和空气层中。每个图案对应于接触角的值。因为我们在实验上确认了模式（3），所以我们的程序证明了功率降低的可能性。