Impact of Major Leakages on Characteristics of a Rotary Vane Expander for ORC

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00316365" target="_blank" >RIV/68407700:21220/17:00316365 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21720/17:00316365

Result on the web

<a href="https://doi.org/10.1016/j.egypro.2017.09.249" target="_blank" >https://doi.org/10.1016/j.egypro.2017.09.249</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.egypro.2017.09.249" target="_blank" >10.1016/j.egypro.2017.09.249</a>

Result language

angličtina

Original language name

Impact of Major Leakages on Characteristics of a Rotary Vane Expander for ORC

Original language description

Volumetric expanders are used for low to medium power output ORC applications. For low power output ORCs (< 10 kW), rotary vane expanders represent a suitable choice. Their isentropic efficiency is often reported as the most important or even the only metrics for comparison. Such approach however neglects the effect of leakages within the expander on the rest of the cycle, especially on the evaporator pressure. Filling factor of rotary vane expanders may be affected, among other leakages, by delayed closure of working chamber. This work describes a semi-empirical model with two different leakages – lumped leakage area between inlet and outlet and leakage between working chambers due to delayed contact of vane and stator. Primary purpose of the model is to demonstrate the effect of the delayed chamber closure. This is identified as a necessary parameter for modeling of the rotary vane expanders, compared to only single lumped leakage area for the other expander types. Results of the model for several case scenarios are presented, showing an impact of these leakages on an overall cycle performance, isentropic efficiency and filling factor. It is demonstrated that isentropic efficiency of the rotary vane expander might not be always sufficient to compare vane expanders or their modifications even within a same ORC. Lastly the model conclusions are preliminarily checked with our experimental data.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/LO1605" target="_blank" >LO1605: University Centre for Energy Efficient Buildings – Sustainability Phase</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Energy Procedia - 4th International Seminar on ORC Power Systems

ISBN

—

ISSN

1876-6102

e-ISSN

—

Number of pages

8

Pages from-to

387-394

Publisher name

Elsevier Ltd

Place of publication

Oxford

Event location

Milano

Event date

Sep 13, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000411758800050