Method of producing ice by using fluorinated pentane

Refrigeration – Processes – Congealing flowable material – e.g. – ice making

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62533, 62534, 252 67, F25C 100, C09K 504

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active

054449863

ABSTRACT:
An ice making refrigerant mainly consists of at least one compound selected from the group of normal perfluoropentane, cycloperfluoropentane, isoperfluoropentane, and fluorohydropentane. The refrigerant may also consists of pentane mixed with a sufficient amount of one or more of the above compounds for making the refrigerant substantially incombustible. The refrigerant is highly resistant to combustion and free from destroying the stratospheric ozone layer. Ice is produced by mixing the refrigerant in liquid phase with water at a pressure higher than the saturation pressure P.sub.0 of the refrigerant for 0.degree. C. and then ejecting the water-refrigerant mixture into a tank at a pressure below the above saturation pressure P.sub.0, so as to evaporate the refrigerant and let the water freeze by the latent heat of evaporation of the refrigerant. It is particularly suitable for air conditioning systems with heat storage in ice, direct contact type ice making plants, direct contact type water chillers, and the like.

REFERENCES:
patent: 3214371 (1965-10-01), Tuwiner
patent: 3251192 (1966-05-01), Rich, Jr. et al.
patent: 3474635 (1969-10-01), Rowe, Jr.
patent: 3856492 (1974-12-01), Klass
patent: 4838039 (1989-06-01), Knodel
patent: 4840652 (1989-06-01), Simon et al.
patent: 5196137 (1993-03-01), Merchant
Chemical Abstracts, vol. 98, No. 18, Acc. No. 149938t, "Equation of State in the Liquid Phase", Aften 'ev, 1982.

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