DESIGN OF 10 KW ROTARY VANE EXPANDER FOR OPERATION WITH ISOBUTANE IN THE EXPAND FACILITY

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21720%2F21%3A00382710" target="_blank" >RIV/68407700:21720/21:00382710 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21220/21:00382710

Result on the web

<a href="https://doi.org/10.13140/RG.2.2.21783.29608" target="_blank" >https://doi.org/10.13140/RG.2.2.21783.29608</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13140/RG.2.2.21783.29608" target="_blank" >10.13140/RG.2.2.21783.29608</a>

Result language

angličtina

Original language name

DESIGN OF 10 KW ROTARY VANE EXPANDER FOR OPERATION WITH ISOBUTANE IN THE EXPAND FACILITY

Original language description

Much of the potential for ORC is in low temperature waste heat recovery (WHR) and geothermal ORCs, while focus on environment friendly working fluids as natural refrigerants is ever increasing. In order to experimentally verify operation of various expanders, to obtain and provide missing experimental data to verify and correct tools used during design of the expanders, the “EXPAND” facility is built at NTNU in Trondheim. This system has been designed as closed loop Brayton cycle, so that the testing parameters of the expanders can be flexibly varied, while energy consumption is reduced by minimizing the heating and cooling needs. This facility has been built to test various expanders up to 75 kW with first experimental campaigns being isobutane turbo-expanders. Rotary vane expander (RVE) has been proposed to be explored as an alternative to the state of the art (but prohibitively expensive) turbo-expanders as a cost-effective solution with decent efficiency. It has been continuously developed at CTU in Prague for MM working fluid and uCHP or moderate temperature waste heat recovery applications. From 2-3 kW machines it has been recently successfully scaled up to provide around 8 kW of power output. Future research of the RVE aims the low temperature WHR and geothermal applications with power output above 10 kW. In order to verify the operation of RVE in these new conditions, a new prototype is designed and will be tested at the “EXPAND” facility. The current RVE design methodology verified for higher temperature applications with MM is described and it is applied to the new boundary conditions with low temperature, increased power output and the working fluid isobutane. Comparison of the design results and expected performance for the isobutane and for the MM expander is shown at the end of this work.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TO01000160" target="_blank" >TO01000160: Optimised expanders for small-scale distributed energy systems</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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