| 摘要 |
PURPOSE: An environment-friendly coolant composition is provided to prevent ozone layer destruction at discharging or wasting coolant, because the ozone depletion potential of the coolant composition is 0, and to able to stably use refreezing system because composition change according to phase change is not occurred. CONSTITUTION: An environment-friendly coolant composition comprises 1-50 kg of difluoromethane(R-32), 50-99 kg of 1,1-difluoroethane(R-152a), and 0.5-1 kg of hexamethyl silicon oil as additives. The ozone depletion potential(ODP) is 0, and the global warming potential(GWP) is 332. More specifically the coolant composition comprises 37.9 kg of difluoromethane(R-32), 62 kg of 1,1-difluoroethane(R-152a), and 0.1 kg of hexamethyl silicon oil.
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