Analysis of moisture condensation during air expansion in turbines

Roumeliotis, I; Mathioudakis, K

dc.contributor.author	Roumeliotis, I	en
dc.contributor.author	Mathioudakis, K	en
dc.date.accessioned	2014-03-01T01:23:36Z
dc.date.available	2014-03-01T01:23:36Z
dc.date.issued	2006	en
dc.identifier.issn	0140-7007	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17040
dc.subject	Air	en
dc.subject	Air conditioning	en
dc.subject	Aircraft	en
dc.subject	Calculation	en
dc.subject	Condensation	en
dc.subject	Cycle	en
dc.subject	Turbine	en
dc.subject	Vapour	en
dc.subject	Water	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Air	en
dc.subject.other	Air conditioning	en
dc.subject.other	Aircraft	en
dc.subject.other	Calculations	en
dc.subject.other	Condensation	en
dc.subject.other	Moisture	en
dc.subject.other	Thermal effects	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Vapors	en
dc.subject.other	Water	en
dc.subject.other	Cycle	en
dc.subject.other	Mixture properties	en
dc.subject.other	Thermodynamic equilibrium	en
dc.subject.other	Turbine condensation	en
dc.subject.other	Turbines	en
dc.title	Analysis of moisture condensation during air expansion in turbines	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijrefrig.2006.03.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijrefrig.2006.03.001	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Water is always present in the atmospheric air in the form of vapour. As air of low temperature expands through the turbine condensation may occur. Condensation gives rise to several problems in materialization of the air cycle as it results in temperature rise thus to different conditions than the expected at the turbine exit. Also in most air cycle applications, liquid water must be removed from the air stream before it gets to the cooled space. In the case that turbine exit temperature is very low; there is the possibility of ice particles formation. A method allowing the evaluation of air properties when condensation occurs is required in order to examine its effect on the cycle and optimize the operating envelope. The present paper describes a thermodynamic equilibrium method for predicting the occurrence of condensation and calculating the mixture properties once condensation has occurred. The method has been validated against the experimental results from a turbocharger turbine. The experimental results show that condensation can cause significant alteration to the turbine exit conditions. It is demonstrated that condensation can be predicted and the mixture properties after condensation can also be accurately evaluated. (c) 2006 Elsevier Ltd and IIR. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	International Journal of Refrigeration	en
dc.identifier.doi	10.1016/j.ijrefrig.2006.03.001	en
dc.identifier.isi	ISI:000240885300005	en
dc.identifier.volume	29	en
dc.identifier.issue	7	en
dc.identifier.spage	1092	en
dc.identifier.epage	1099	en