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Optimization design and exergy analysis of organic rankine cycle in ocean thermal energy conversion

発表形態:
原著論文
主要業績:
その他
単著・共著:
共著
発表年月:
2012年02月
DOI:
会議属性:
指定なし
査読:
有り
リンク情報:
Applied Ocean Research

日本語フィールド

著者:
Faming Sun, Yasuyuki Ikegami, Baoju Jia,Hirofumi Arima
題名:
Optimization design and exergy analysis of organic rankine cycle in ocean thermal energy conversion
発表情報:
Applied Ocean Research 巻: 35 ページ: 38-46
キーワード:
ORC; Optimization design; Exergy analysis; OTEC; Ammonia or r134a
概要:
抄録:
Performance analytical function and exergy efficiency of organic rankine cycle (ORC) in ocean thermal energy conversion (OTEC) are derived and optimized in this paper. Firstly, the state function corresponding to every point in ORC and depending strongly on the temperature of the evaporator and condenser is successfully achieved, where the suitable working fluids include, but not limited to, ammonia, r134a, etc. And then the system net power output function is achieved based on the characteristics of the ORC, which is mainly decided by the warm seawater temperature, warm seawater mass flow rate, evaporator temperature, condenser temperature, etc. After that, a further optimization is carried out to maximize the net power output of ORC. Results show that ammonia is a good choice for ORC utilized in OTEC from net power output viewpoint. In addition, thermal efficiency and exergy efficiency at maximum net power output are also given as reference. Finally, the preliminary design criteria of ORC in OTEC illustrates that the design of the ORC in a certain scale should choose its corresponding reasonable heat exchanger since it is a choke point for the larger maximum net power output.

英語フィールド

Author:
Faming Sun, Yasuyuki Ikegami, Baoju Jia,Hirofumi Arima
Title:
Optimization design and exergy analysis of organic rankine cycle in ocean thermal energy conversion
Announcement information:
Applied Ocean Research Vol: 35 Page: 38-46
Keyword:
ORC; Optimization design; Exergy analysis; OTEC; Ammonia or r134a
An abstract:
Performance analytical function and exergy efficiency of organic rankine cycle (ORC) in ocean thermal energy conversion (OTEC) are derived and optimized in this paper. Firstly, the state function corresponding to every point in ORC and depending strongly on the temperature of the evaporator and condenser is successfully achieved, where the suitable working fluids include, but not limited to, ammonia, r134a, etc. And then the system net power output function is achieved based on the characteristics of the ORC, which is mainly decided by the warm seawater temperature, warm seawater mass flow rate, evaporator temperature, condenser temperature, etc. After that, a further optimization is carried out to maximize the net power output of ORC. Results show that ammonia is a good choice for ORC utilized in OTEC from net power output viewpoint. In addition, thermal efficiency and exergy efficiency at maximum net power output are also given as reference. Finally, the preliminary design criteria of ORC in OTEC illustrates that the design of the ORC in a certain scale should choose its corresponding reasonable heat exchanger since it is a choke point for the larger maximum net power output.


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