Partager

Document IIF

Nouveaux développements concernant les systèmes d'évaporation et de séparation relatifs à l'ammoniac.

New developments on ammonia evaporation and separation systems.

Numéro : pap. n. 16

Auteurs : AARNIO A.

Résumé

Vahterus is a Finnish, family owned company, the inventor and manufacturer of fully welded Plate&Shell Heat Exchanger since 1990. Recently the company has developed two different kinds of evaporator/separating systems. The target of the developing was to reach a low ammonia charge and compact size unit combined to a safe and environment friendly construction. The first newly developed construction has been named the "Combined Evaporator". This system performs two functions in one compact cylinder type of round shell; the evaporating section in the bottom and the droplet separating section on the top. Vahterus has its own in-house testing laboratory. It gives the possibility to run NH3 in the system producing a lot of practical testing results; furthermore, we have a lot of customer experiences and test results from them. These data has been used in the development process and heat exchanger dimensioning software. The "Combined Evaporator" was introduced in Chillventa fair 2008. The newest construction revision has been available from the beginning of 2012. Tests have shown that the operation is in line with expectations. Main benefits of using the "Combined Evaporator" are to reach as small footprint and constructional volume as possible; as small charge of ammonia as possible and the possibility to save piping, insulating and transportation charges.
Another newly developed construction has been named "Vahterus External System" ("VES"). It is a new version of the two-vessel-system (evaporator + separator). "VES" works with similar technical principle as the "Combined Evaporator", giving the possibility to minimize the size of the separator vessel and the ammonia charge. The dimensional size of the "Combined Evaporator" is limited, so on very large duties the "VES" is preferred because it gives the opportunity to reduce the size compared to the traditional heat exchanger and separator. When using the "VES" it is now possible to have a smaller construction for larger capacity units. It is my pleasure to have the possibility to share this paper as a presentation of the newly developed technical solutions to minimize the ammonia charge in our fully welded heat exchangers in different kinds of applications and solutions. I highly appreciate to have this opportunity to participate in this conference and its chosen topics; as a manufacturer we have the same target with IIAR association concerning the use of ammonia. Our target is to reach the growing use of ammonia in the refrigeration branch of industry and at the same time to reach a smaller charge of ammonia in every single installation. In addition we have the target to expand the use of other natural refrigerants as CO2.

Documents disponibles

Format PDF

Pages : 7 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : New developments on ammonia evaporation and separation systems.
  • Identifiant de la fiche : 30007657
  • Langues : Anglais
  • Source : 5th Conference on Ammonia Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 9-11, 2013.
  • Date d'édition : 09/05/2013

Liens


Voir d'autres communications du même compte rendu (23)
Voir le compte rendu de la conférence

Indexation