日本財団 図書館

共通ヘッダを読みとばす


Top > 産業 > 運輸.交通 > 成果物情報

論文集 ISME TOKYO 2000 Volume?

 事業名 第6回舶用機関国際シンポジウムの開催
 団体名 日本マリンエンジニアリング学会  


TS-38

 

Development of a Small 50W Class Stirling Engine

 

Koichi HIRATA*

 

ABSTRACT

In order to develop a compact and low cost Stirling engine, a gamma type Stirling engine with simple moving-tube-type heat exchangers and a Rhombic mechanism was developed. Its target shaft power is 50 W at engine speed of 4000 rpm and mean pressure of 0.8 MPa using helium as working gas. This paper describes the outline of the engine design and the performance test. The test was done without load, using air in atmospheric condition. Also, a mechanical loss measurement was done in highly pressurized condition, in which the engine was driven by a motor compulsory. Then, methods to get higher performance were considered based on the comparison of experimental and calculated results. The results indicate that a higher performance heat exchanger and decreasing of mechanical loss are needed for the attainment of the target performance.

 

Key Words: Stirling Engine, Heat Exchanger, Mechanical Loss, and Engine Design

 

1. INTRODUCTION

 

Global environment protection has come to be more and more important recently, and demand for engines with high efficiency and low pollution is increasing. Stirling engines have a potential solution to the above problems. Because, they have excellent characteristics which are high thermal efficiency, multi-fuel capability and low pollution.

There are several types of Stirling cycle machine. They are being researched and developed actively all over the world. Especially the Stirling refrigerators are used practically in several fields. Low temperature differential Stirling engines are expected as power sources using solar or geothermal energy. A prototype engine that is shown in this paper is one of high temperature differential Stirling engines. As typical developments of high temperature differential Stirling engines, several high performance engines for air conditioners were developed in Moonlight project on 1982 in Japan.

[1] Then, it was clarified that the Stirling engine has high efficiency and low pollution characteristics. However, the Stirling engine has not reached practical use enough, because it has several problems; i.e., a high production cost limited endurance of no-lubricated seal devices, and heavy weight.

The main purpose of this study is to develop a compact and lightweight Stirling engine with low production cost. Also, it is aimed to find a suitable type of heat exchangers and a piston drive mechanism for the compact Stirling engine.

 

2. DESIGN OF A PROTOTYPE ENGINE

 

In order to develop a compact and low cost Stirling engine, a gamma type Stirling engine that had simple moving-tube-type heat exchangers and a Rhombic mechanism was designed as follows.

 

2.1 TARGET PERFORMANCE AND SPECIFICATIONS

In order to predict power and engine speed at the early design stage, a simple prediction method [2] was used. This prediction method is based on experimental results of various Stirling engines, and it can predict the effects of working gas and the engine speed correspond to the maximum shaft power. On the other hand, in order to reduce the size of the engine, it is necessary that the engine be operated at higher engine speed. From a result of the simple prediction method the engine speed at the maximum shaft power increases with the reduction of swept volume of a power piston.

Figure 1 shows one of the calculated results of the relationship between mean pressure, Pm, the maximum shaft power, Ls, and engine speed, N. As the calculation conditions, swept volume of a power piston, VE, was set to 9.9 cm3, expansion space gas temperature, TE, was set to 600℃, and compression space gas temperature, TC, was set to 40℃. This figure shows that shaft power of 50 W is obtained at engine speed of 4000 rpm using helium as working gas.

 

355-1.gif

Fig. 1 Calculated result of the simple prediction method

 

Table 1 Target performance and specifications

355-2.gif

 

* Ship Research Institute

Shinkawa 6-38-1, Mitaka, Tokyo 181-0004, JAPAN

FAX: +81-422-41-3101, E-mail: khirata@srimot.go.jp

 

 

 

BACK   CONTENTS   NEXT

 






サイトに関するご意見・ご質問・お問合せ   サイトマップ   個人情報保護

日本財団会長笹川陽平ブログはこちら



ランキング
注目度とは?
成果物アクセスランキング
581位
(31,373成果物中)

成果物アクセス数
16,888

集計期間:成果物公開〜現在
更新日: 2019年7月13日

関連する他の成果物

1.プログラム ISME TOKYO 2000
2.論文集 ISME TOKYO 2000 Volume?
3.ISME TOKYO 2000追加論文 ADVANCES IN MARINE ENGINE LUBRICATION
4.ISME TOKYO 2000 追加論文 FT8 Phase ? Reliability Improvement Program
5.PROCEEDINGS OF ISME TOKYO 2000 SPECIAL LECTURE
6.参加者名簿
7.展示用DIRECTORY
8.学会誌Vol.36 No.2
9.中高齢者の災害防止のためにイラスト入り中高齢者災害事例と安全対策墜落・転落編
  [ 同じカテゴリの成果物 ]


アンケートにご協力
御願いします

この成果物は
お役に立ちましたか?


とても役に立った
まあまあ
普通
いまいち
全く役に立たなかった


この成果物をどのような
目的でご覧になりましたか?


レポート等の作成の
参考資料として
研究の一助として
関係者として参照した
興味があったので
間違って辿り着いただけ


ご意見・ご感想

ここで入力されたご質問・資料請求には、ご回答できません。






その他・お問い合わせ
ご質問は こちら から