Transient response of a 50 kW organic Rankine cycle system

Yuh-Ren Lee, Chi-Ron Kuo and Chi-Chuan Wang

Energy, 2012, vol. 48, issue 1, 532-538

Abstract: This study examines the transient responses of a 50 kW ORC (Organic Rankine Cycle) system subject to change of the water coolant in the condenser with R-245fa as the working fluid. With a moderate increase or decrease of water coolant flow rate, all the major quantities such as the output power, condensing pressure, evaporation pressure show mild transition. The mass flow rate of the R-245fa remains roughly the same during the transient. For a sharp rise of the water coolant flow rate, the ORC system undergoes a rather unusual behavior. The output power is first slightly increased, followed by a sharp decline to barely any output power and remains there until the end of the transient. The output power increased back right after the transient and exceeded its original state. There is almost no R-245fa mass flow rate during the power outage period. Yet the evaporation pressure also experienced a gigantic falloff during the transient period. This peculiar surge phenomenon is related to tremendous change of the total void when condensation takes place that momentarily reduces the R-245fa mass flow rate. The surge effect caused by the water coolant is associated with the rate of variation in the overall heat transfer coefficient.

Keywords: Organic Rankine cycle; Transient response; Condenser (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544212007918
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:48:y:2012:i:1:p:532-538

DOI: 10.1016/j.energy.2012.10.029

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().