標題: Dynamic Response of a 50 kW Organic Rankine Cycle System in Association with Evaporators
作者: Lee, Yuh-Ren
Kuo, Chi-Ron
Liu, Chih-Hsi
Fu, Ben-Ran
Hsieh, Jui-Ching
Wang, Chi-Chuan
機械工程學系
Department of Mechanical Engineering
關鍵字: organic Rankine cycle (ORC);evaporator;shell-and-tube heat exchanger;plate heat exchanger
公開日期: 1-四月-2014
摘要: The influences of various evaporators on the system responses of a 50 kW ORC system using R-245fa are investigated in this study. First the effect of the supplied hot water flowrate into the evaporator is examined and the exit superheat on the system performance between plate and shell-and-tube evaporator is also reported. Test results show that the effect of hot water flowrate on the evaporator imposes a negligible effect on the transient response of the ORC system. These results prevail even for a 3.5-fold increase of the hot water flowrate and the system shows barely any change subject to this drastic hot water flowrate change. The effect of exit superheat on the ORC system depends on the type of the evaporator. For the plate evaporator, an exit superheat less than 10 degrees C may cause ORC system instability due to considerable liquid entrainment. To maintain a stable operation, the corresponding Jakob number of the plate heat evaporator must be above 0.07. On the other hand, by employing a shell and tube heat evaporator connected to the ORC system, no unstable oscillation of the ORC system is observed for exit superheats ranging from 0 to 17 degrees C.
URI: http://dx.doi.org/10.3390/en7042436
http://hdl.handle.net/11536/24488
ISSN: 1996-1073
DOI: 10.3390/en7042436
期刊: ENERGIES
Volume: 7
Issue: 4
起始頁: 2436
結束頁: 2448
顯示於類別:期刊論文


文件中的檔案:

  1. 000336217000029.pdf