| 摘要 |
[PROBLEMS] To provide a safe, nontoxic, and high-performance mixed refrigerant for heating/hot water supply systems which is prepared by mixing dimethyl ether with carbon dioxide and which does not deplete the ozone layer, has a low global warming potential, and permits low-pressure operation. [MEANS FOR SOLVING PROBLMES] A composition which comprises 1 to 10 % by mole of dimethyl ether and 99 to 90 % by mole of carbon dioxide, each percentage being based on the total number of moles of dimethyl ether and carbon dioxide.
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