Keywords: NaCl, cooling, characteristics, cooling capacity, temperature,

　　The concentration of NaCl aqueous solution has a significant impact on the cooling characteristics. When the concentration exceeds 5%, the concentration increases and the cooling capacity increases. After exceeding 17%, the cooling capacity decreases due to the increase of solution viscosity. When the concentration reaches 20%, the cooling capacity decreases significantly. Therefore, the concentration of commonly used NaCl aqueous solution is generally controlled at 5% ~ 15% (that is, the specific gravity is 1.039~1.108g/cm3).

Figure & nbsp; Cooling rate curves of 10% and 20% sodium chloride aqueous solutions at different temperatures
(‌Φ20mm silver ball sample, sample moving speed 25 cm/s)

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