Partager

Recommandé par l'IIF / Document IIF

Évaluation des risques de fuite de R290 d’un climatiseur domestique de type split d’une puissance de 1 HP par détection de la concentration et inflammation expérimentale.

R290 leakage hazards assessment of a 1 HP split-type household air conditioner by concentration detection and ignition experiment.

Auteurs : NING Q., HE G., SUN W., FAN M., LI X., HONG Z.

Type d'article : Article de la RIF

Résumé

Propane (R290) is a promising alternative natural refrigerant for refrigeration, air conditioning and heat pump systems to replace hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), but its highly flammable and explosive properties require specific attention and hinder the replacement process. A fire and/or an explosion may occur once R290 leaks. This paper evaluated the fire hazards of a 1 HP split-type household air conditioner (STHAC) with a charge of 260 g to 350 g not only by measuring the R290 concentration distribution 1.5 m above the floor after a leakage occurred in the indoor unit (IDU) under various situations, but also by ignition experiment to examine the validity of concentration distribution results. A new method for reducing fire hazards was provided by installing a check valve near the gas-liquid separator with a solenoid valve installed after the capillary to prevent the transference of refrigerant from the condenser to the evaporator, which was validated to effectively decrease the fire hazards. The effects of charge, leak hole diameter and valve arrangement on the R290 concentration profiles were studied. It was found that under a fast-leaking rate, a fire occurred though the maximal concentration was 73% LFL detected by infrared gas detectors. This indicated that the detected R290 concentration may be lower than the actual concentration at a fast-leaking rate, and the ignition test was probably the most accurate method for fire hazards assessment. The low-risk application boundaries of the 1 HP STHAC were confirmed both by concentration detection and ignition test.

Documents disponibles

Format PDF

Pages : 70-83

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 : R290 leakage hazards assessment of a 1 HP split-type household air conditioner by concentration detection and ignition experiment.
  • Identifiant de la fiche : 30029832
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 139
  • Date d'édition : 07/2022
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2022.04.005

Liens


Voir d'autres articles du même numéro (19)
Voir la source

Indexation