@inproceedings{oai:jaxa.repo.nii.ac.jp:00008006,
 author = {佐藤, 智明 and Sato, Tomoaki},
 book = {宇宙エネルギーシンポジウム, Space Energy Symposium},
 month = {Jun},
 note = {第28回宇宙エネルギーシンポジウム(2009年3月9日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス), The twenty-eight Space Energy Symposium (March 9, 2009. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara), Electro assisted free-piston or semi-free-piston Stirling cycle has been adopted mainly for refrigerator or generator. Stirling engines having such system have been hardly seen because of the low thermal efficiency. On the other hand, these electro assisted Stirling engines such as linear motor displacer type have a merit on the easy control of power. When the energy such as the terrestrial heat and solar energy exists unlimitedly, the easiness of the control of power will be given priority over the thermal efficiency. In the space environment, the solar energy is unlimitedly obtained and the clean engine which does not make the inner air of the space station or space colony polluted will be demanded. Therefore, the electro assisted Stirling engine will be effective against the space application. In this paper, linear motor displacer type of electro assisted Stirling engine is proposed for the space application. The electro assisted Stirling engine has two merits. The first merit is the easiness of the control of power. The more the phase lag between the power piston and displacer shifts from the angle of 90 degrees (This angle gives the best thermal efficiency), the more the thermal efficiency goes down. Therefore, controlling the phase lag, the power of the Stirling engine is controlled. The second merit of the electro assisted Stirling is the flexibility of the placements of the power piston and displacer. In the ordinary Stirling engine, power piston and displacer must be placed in the neighborhood, because these two units are linked by crank shaft. On the other hand, in the electro assisted Stirling engine, the movements of the power piston and the displacer are electrically synchronized. Therefore, in the electro assisted Stirling engine, the power piston and displacer are able to be remotely placed. This flexibility of the placements of the power piston and displacer gives several unique usages for the space application like the following proposal. In this study three arrangements of the power piston and displacer are proposed for the space application. The arrangements are shown in Fig.2 and Fig.3. Fig.2 shows the system of one power piston versus one displacer. In this system there are one displacer unit which has concave mirror by which solar energy is gathered and one power piston which is remotely placed from the displacer. The displacer and the power piston are connected by pressure transmission tube. The displacer unit which has a solar concave mirror is placed outboard and power piston unit is placed inboard. By this system, we can use the power which is generated by solar energy at the inner space of space station or space colony. Fig.3 shows the other two systems. These systems have plural power piston. Fig.3 (a) shows the system which has one large displacer unit and plural power piston. By this system we can use the plural power pistons (which are attached to the same displacer unit) in the plural rooms of space station. Fig.3 (b) shows the system which has plural displacer units and plural power pistons. In this system, each power piston has a different characteristic frequency and each displacer is synchronized with the different power piston one to one. In this study, a prototype of the electro assisted Stirling engine which has one displacer and one power piston has been developed and it was confirmed that this system is able to operate by operation experiment. Fig.4 shows the experiment., 資料番号: AA0064295015},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)},
 title = {ディスプレーサーとパワーピストンを遠隔同期させるセミフリーピストン式スターリングエンジン: 宇宙利用を想定した電気アシストスターリングエンジンの提案},
 volume = {28},
 year = {2009}
}