| 摘要 |
<p>A refrigerant for use in a refrigeration system. The refrigerant comprises a mixed gas of at least three different hydrocarbons, including isobutane (C<SUB>4</SUB>H<SUB>10</SUB>), ethene (C<SUB>2</SUB>H<SUB>4</SUB>) and methane (CH<SUB>4</SUB>). The mixed gas comprises at least 70% by weight of isobutane (C<SUB>4</SUB>H<SUB>10</SUB>). Using the refrigerant it is possible to obtain low refrigeration temperatures, e.g. below -79°C, without the need for a cascade refrigeration system, and without the need for applying a hydrofluoride to the refrigerant. Thereby the refrigerant is environment friendly, and energy is conserved during the refrigeration process. Furthermore, a refrigeration system adapted to have the refrigerant filled into the refrigerant path.</p> |
