Characterization and modeling of a scroll expander with air and ammonia as working fluid
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
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http://dx.doi.org/10.1016/j.applthermaleng.2014.05.069 |
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Títol
Characterization and modeling of a scroll expander with air and ammonia as working fluidAutoria
Data de publicació
2014-09Editor
ElsevierISSN
1359-4311Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S1359431114004451#Paraules clau / Matèries
Resum
This paper presents the experimental characterization and modeling of a scroll expander. The expander used here is a scroll compressor modified to work as an expander. It is characterized in two experimental setups ... [+]
This paper presents the experimental characterization and modeling of a scroll expander. The expander used here is a scroll compressor modified to work as an expander. It is characterized in two experimental setups using air and ammonia as working fluids. The paper studies how the main operating variables (supply pressure and temperature, pressure ratio, rotational speed and lubrication) influence the performance of the scroll expander. A semi-empirical model is proposed to determine the scroll expander performance. This model uses some semi-empirical parameters (such as built-in volume ratio, leakage area and mechanical losses), obtained through experimentation, to calculate the mechanical power, supply mass flow rate and exhaust temperature. Using this semi-empirical model, the deviations in the calculated mechanical power, exhaust temperature and supply mass flow rate are ±9%, ±4 K and ±5% Hz. [-]
Publicat a
Applied Thermal Engineering Vol. 70, no. 1, 2014Drets d'accés
Copyright © 2015 Elsevier B.V.
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