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Computing the partial volume of pressure vessels / Bent Wiencke in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 868-876 Titre : Computing the partial volume of pressure vessels Titre original : Calcul du volume partiel des récipients sous pression Type de document : texte imprimé Auteurs : Bent Wiencke, Auteur Année de publication : 2010 Article en page(s) : pp. 868-876 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Vessel  Storage  Two-phase  mixture  Calculation  Volume  Parameter  Geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The computation of the partial and total volume of pressure vessels with various type of head profiles requires detailed knowledge of the head profile geometry. Depending on the type of head profile the derivation of the equations can become very complex and the calculation process cumbersome. Certain head profiles require numerical methods to obtain the partial volume, which for most application is beyond the scope of practicability. This paper suggests a unique method that simplifies the calculation procedure for the various types of head profiles by using one common set of equations without the need for numerical or complex computation methods. For ease of use, all equations presented in this paper are summarized in a single table format for horizontal and vertical vessels. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002734 [article] Computing the partial volume of pressure vessels = Calcul du volume partiel des récipients sous pression [texte imprimé] / Bent Wiencke, Auteur . - 2010 . - pp. 868-876. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 868-876 Mots-clés : Refrigeration  system  Vessel  Storage  Two-phase  mixture  Calculation  Volume  Parameter  Geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The computation of the partial and total volume of pressure vessels with various type of head profiles requires detailed knowledge of the head profile geometry. Depending on the type of head profile the derivation of the equations can become very complex and the calculation process cumbersome. Certain head profiles require numerical methods to obtain the partial volume, which for most application is beyond the scope of practicability. This paper suggests a unique method that simplifies the calculation procedure for the various types of head profiles by using one common set of equations without the need for numerical or complex computation methods. For ease of use, all equations presented in this paper are summarized in a single table format for horizontal and vertical vessels. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002734

Fundamental principles for sizing and design of gravity separators for industrial refrigeration / Bent Wiencke in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 2092–2108 Titre : Fundamental principles for sizing and design of gravity separators for industrial refrigeration Titre original : Principes de base pour le dimensionnement et la conception de séparateurs de liquide par gravité pour le froid industriel Type de document : texte imprimé Auteurs : Bent Wiencke, Auteur Année de publication : 2012 Article en page(s) : pp. 2092–2108 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  Two-phase  flow  Liquid  Gravity  Separation  Mass  transfer Résumé : Throughout the past decades, the industrial refrigeration industry has developed various “rule of thumb” methods for sizing gravity liquid separators for ammonia and other common refrigerants. However, to date a uniform systematic approach or an agreeable standard has not been established. For commonly used refrigerants such as ammonia, the large installed base of separators can be used as a benchmark for sizing separators. But, when using a less common refrigerant such as CO2, the designer faces new challenges. In this paper, a systematic approach is presented for sizing horizontal and vertical gravity liquid separators for industrial refrigeration applications. To compute separation velocities and separation distances, a theoretical model is presented. The model is used as a basis for comparison with observations from 85 operating gravity separators surveyed in the field. Criteria and formulas are presented for estimating the required liquid volume for storage. An example is provided demonstrating the use of the methods presented in this paper. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001563 [article] Fundamental principles for sizing and design of gravity separators for industrial refrigeration = Principes de base pour le dimensionnement et la conception de séparateurs de liquide par gravité pour le froid industriel [texte imprimé] / Bent Wiencke, Auteur . - 2012 . - pp. 2092–2108. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 2092–2108 Mots-clés : Refrigeration  Two-phase  flow  Liquid  Gravity  Separation  Mass  transfer Résumé : Throughout the past decades, the industrial refrigeration industry has developed various “rule of thumb” methods for sizing gravity liquid separators for ammonia and other common refrigerants. However, to date a uniform systematic approach or an agreeable standard has not been established. For commonly used refrigerants such as ammonia, the large installed base of separators can be used as a benchmark for sizing separators. But, when using a less common refrigerant such as CO2, the designer faces new challenges. In this paper, a systematic approach is presented for sizing horizontal and vertical gravity liquid separators for industrial refrigeration applications. To compute separation velocities and separation distances, a theoretical model is presented. The model is used as a basis for comparison with observations from 85 operating gravity separators surveyed in the field. Criteria and formulas are presented for estimating the required liquid volume for storage. An example is provided demonstrating the use of the methods presented in this paper. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001563