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  


The detailed drawing of heat exchanger can be shown in figure 10. Heater and cooler have adopted plate fin and tube type heat exchangers. Gas temperature measurements of both spaces are carried out by means of the K-type thermocouples in the exit and entrance of heater and cooler.

 

2) Engine performance prediction

Figure 11 shows the calculation results of performance prediction which simulates the relations between buffer pressure and maximum power using the specifications of 1kW low temperature difference Stirling engine. Computation model for the performance prediction is the 2nd order method of the isotherm model considering temperature change in the cylinder. The calculation condition is 100℃ at the higher side temperature, and the lower side temperature is 20℃. Here, mechanism efficiency for the calculation of shaft power refers to mechanism efficiency [4] of 300W engine, which is e=0.95. From this figure, it is proved that both maximum indicated power and maximum shaft power increase almost rectilinear corresponding to the buffer pressure. Maximum shaft power of about 1.5kW and maximum indicated power of about 1.8kW could be expected at the buffer pressure of 1MPa.

Figure 12 shows maximum indicated power and maximum shaft power when the higher side temperature to be 100℃ and the lower side temperature to be changed. From this figure, shaft power drops from 1.5kW to 1kW when lower side temperature rises from 20℃ to 30℃. Dropping ratio is 33%. And, when lower side temperature is changed from 20℃ to 10℃, shaft power increases from 1.5kW to 2kW, increases 33%. As a result, abilities of the heater and cooler are very important, because the output power is greatly affected by changing the temperature of only 10℃. In addition. it is considered that flow rate of hot and cold water influences the heat quantity supplied to the working gas in the engine.

Figure 13 shows maximum indicated power and maximum shaft power when the flow rate of hot water of the heat source is changed. It is using the quasi-steady flow model [5]. In this figure, the buffer pressure is 1MPa, higher side temperature is 100℃, lower side temperature is 20℃. From this figure, it is proven that flow rate of hot water is required more than 50 l/min.

 

3) Experimental Result and Considerations

The test equipment system is similar to figure 2. Details of the system have improved in many items referring to experimental results of 300 watt engine and calculation results of performance prediction. The capacity of the electric heater for heating the ethylene glycol is increased from 10kW to 30kW. It can provide sufficient heat capacity to avoid temperature drop in the high buffer pressure operation. Pump system was also changed in order to set the flow rate of 45〜50 liter. The experimental conditions can be shown in table 4.

Figure 1 4 shows relations between engine speed and gas temperature of each parts at the buffer pressure of 500kPa. From this figure, the heat source temperature respectively keeps about 133℃ and heat sink temperature is about 20℃. The expansion space side gas temperature becomes 100〜110℃, and compression space side gas temperature becomes about 33〜35℃. The tendency of the temperature difference of both space is shown. It decreases as engine speed rises.

 

345-1.gif

Fig.11 Engine Performance Prediction as Function of Buffer Pressure

 

345-2.gif

Fig.12 Engine Performance Prediction as Function of Heat sink Temperature

 

345-3.gif

Fig 13 Engine Perfomance Prediction as Function of Flow Rate Heat source

 

345-4.gif

Table 4 Experimental Ccnditions

 

 

 

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
579位
(32,471成果物中)

成果物アクセス数
17,601

集計期間:成果物公開〜現在
更新日: 2020年8月8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