A comparison study and performance analysis of free piston expander-linear generator for organic Rankine cycle system

Xiaochen Hou, Hongguang Zhang, Tenglong Zhao, Yonghong Xu, Yaming Tian, Jian Li, Mengru Zhang and Yuting Wu

Energy, 2019, vol. 167, issue C, 136-143

Abstract: In this paper, a free piston expander-linear generator (FPE-LG) experiment rig equipped with different linear generator (LG) is established. A comparison study on the performance of FPE-LG with different LGs is conducted. Then the operation characteristics and output characteristics of FPE-LG are investigated. The results show that the selection and design of LG has significant influence on FPE-LG performance. The displacement and velocity with LG-1 are higher than that LG-2’s, but the operation stability and output performance with LG-2’s are better. Considering the high pressure and temperature operation conditions in ORC system, LG-2 is suitable for this experiment rig. Both actual stroke and velocity increase with intake pressure and external load resistance. The variations of actual stroke, velocity, indicated efficiency, voltage and power output are more sensitive to intake pressure than external load resistance. The maximum power output can reach up to 111 W. The voltage output is in agreement with that of velocity. The peak voltage output is usually obtained when the velocity reaches peak value. The energy conversion efficiency shows first increases and then decreases with external load resistance and intake pressure. The maximum energy conversion efficiency of 74% can be obtained.

Keywords: Experiment; Free piston expander-linear generator; Comparison study; Output characteristics; Conversion efficiency (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544218321935
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:167:y:2019:i:c:p:136-143

DOI: 10.1016/j.energy.2018.10.196

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 ().