Document IIF
Cartographie du coefficient de performance pour des pompes à chaleur à l’ammoniac à grande échelle pour systèmes de chauffage urbain.
Mapping of coefficient of performance for large-scale ammonia heat pumps for district heating systems.
Numéro : pap. n. 1276
Auteurs : JØRGENSEN P., OMMEN T., MARKUSSEN M., et al.
Résumé
Many system configurations of large-scale heat pumps (HP) are applicable to a district heating system, and choosing the right HP technology may be a challenge. In this study, thermodynamic models of eight different HP configurations are used to compare the Coefficient of Performance (COP) and Lorenz efficiency, for a range of sink and source outlet temperatures. Furthermore, for a specific case the total volume flow rate for each configuration was compared. The results revealed that a configuration with two two-stage cycles with low stage desuperheat heat exchangers in most operating conditions was superior in terms of COP. However, for all considered operating conditions at least three configurations obtained a COP which was less than 3 % lower than the best one. Comparing the volume flow rates among the configurations a combination of a one-stage cycle and a two-stage cycle with low stage desuperheat heat exchanger holds the lowest needed volume flow rate.
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Détails
- Titre original : Mapping of coefficient of performance for large-scale ammonia heat pumps for district heating systems.
- Identifiant de la fiche : 30026090
- Langues : Anglais
- Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Date d'édition : 24/08/2019
- DOI : http://dx.doi.org/10.18462/iir.icr.2019.1276
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Indexation
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Thèmes :
Techniques des pompes à chaleur;
Ammoniac - Mots-clés : Thermodynamique; Comparaison; R717; Ammoniac; Pompe à chaleur; Modélisation; Haute température; COP; Chauffage urbain
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