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Application et analyse du procédé de vaporisation instantanée multiétagée pour la production de vapeur dans un système de pompe à chaleur haute température avec une grande différence de température.

Application and analysis of multi-stage flash vaporization process in steam production in high-temperature heat pump system with large temperature difference.

Auteurs : ZHANG Y., HAO Z., WANG L., XU J., HUANG L., CHEN J., HUANG Z.

Type d'article : Article de la RIF

Résumé

The high-temperature heat pump steam system (HTHPS) is an effective way to replace the calcining boiler's steam. However, the large temperature span of the system leads to colossal exergy loss of refrigerant in expansion valves and other components. Therefore, it is hoped to adopt the dual-flash vaporization process to improve the system's steam production performance. In this paper, three thermodynamic models and exergy models of HTHPS with a double flash evaporation process are established. Furthermore, this paper uses the multivariate simulated annealing algorithm to calculate the optimal COP of the system. Then, by comparing the single-stage compression (SC) system and the quasi-two-stage compression (QTC) system, the influence of the dual-flash vaporization process on HTHPS is analyzed. The results show that under the same environment, the COP of the dual-flash vaporization process compression system is 23.8% 44.54% higher than that of the SC system. With the increase of the system temperature span, the flash steam supplemental process brings the system to improved thermodynamic performance. Moreover, the exergy model of the dual-flash system is closest to the reversed Carnot cycle, when the evaporation temperature is 50 °C and the condensing temperature is 110 °C.

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Format PDF

Pages : 123-132

Disponible

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    20 €

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Détails

  • Titre original : Application and analysis of multi-stage flash vaporization process in steam production in high-temperature heat pump system with large temperature difference.
  • Identifiant de la fiche : 30029267
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 133
  • Date d'édition : 01/2022
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2021.09.035
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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