Humid GasThermodynamic Change (especially for PEM FC Turbochargers)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00381855" target="_blank" >RIV/68407700:21220/24:00381855 - isvavai.cz</a>

Výsledek na webu

<a href="http://fs12120.fsid.cvut.cz/softlib/2024/ThermChangeHumidGas_PEMFC_v3.zip" target="_blank" >http://fs12120.fsid.cvut.cz/softlib/2024/ThermChangeHumidGas_PEMFC_v3.zip</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Humid GasThermodynamic Change (especially for PEM FC Turbochargers)

Popis výsledku v původním jazyce

Model of humid air expansion for a turbine or an ejector flow is necessary for accurate simulation of e-turbo or air-loop ejectors used in PEM FCs. High humidity tends to condensation during adiabatic expansion, which changes significantly temperature and reduces isentropic exponent. It reduces the risk of ice occurence in turbomachines or ejector nozzles, if pressure ratio does not exceed certain level. Transfer of results to GT Suite is envisaged. The side-effects of the code are possibilities to simulate evaporative cooling by using condensed water in PEM FC exhaust gas or to evaluate the danger of choking the air-loop channels in bipolar plates by condensed water.

Název v anglickém jazyce

Humid GasThermodynamic Change (especially for PEM FC Turbochargers)

Popis výsledku anglicky

Model of humid air expansion for a turbine or an ejector flow is necessary for accurate simulation of e-turbo or air-loop ejectors used in PEM FCs. High humidity tends to condensation during adiabatic expansion, which changes significantly temperature and reduces isentropic exponent. It reduces the risk of ice occurence in turbomachines or ejector nozzles, if pressure ratio does not exceed certain level. Transfer of results to GT Suite is envisaged. The side-effects of the code are possibilities to simulate evaporative cooling by using condensed water in PEM FC exhaust gas or to evaluate the danger of choking the air-loop channels in bipolar plates by condensed water.

Druh

R - Software

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TN02000054" target="_blank" >TN02000054: Národní centrum kompetence inženýrství pozemních vozidel Josefa Božka</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Interní identifikační kód produktu

ThermChangeHumidGas_PEMFC

Technické parametry

Code for differential equation integrations during defined irreversible adiabatic expansion/compression or for change with heat transfer, no work transfer and (small) pressure change as a result of friction loss in a heat-excahnger channel. Features of liquid water/steam are approximated by state formulas, valid up to 1 MPa partial pressure of steam in a gaseous mixture of oxygen, nitrogen, water steam and argon (all specific thermal capacities of gases are temperature dependent, latent heat and water thermal capacity kept constant). Irreversible adiabatic change is defined by virtual polytropic approximation, based on isentropic efficiency of real change. Impact of exit velocity triangle at turbines is involved in estimation of isentropic efficiency changed due to specific volume reduction. The results are characterized by non-linear regression with adjustable exponents in generalized polynomial as functions of pressure, specific volume (gaseous phase) and temperature. These functions may be used instead of a look-up tables for simulation of changes with condensation/evaporation. Microsoft Office 365, 4 MB of a code, visual basic for macros elaborating result storage.

Ekonomické parametry

Annual licence 20 000 Kč or ad-hoc use, based on contract on research activity for estimation of turbine or compressor power, for evaporative cooling effect or for assessment of water-choking danger.

IČO vlastníka výsledku

68407700

Název vlastníka

České vysoké učení technické v Praze v Praze, Fakulta strojní