Vliyanie vzaimodeystviya mezhdu molekulami rastvoritelya na temperaturu zamerzaniya vodnopropilenglikolevykh rastvorov khlorida natriya, ispol'zuemykh v kachestve khladonositeley

Waterpropylene glycol electrolyte solutions are used as coolants in such sectors of industry as refrigeration, food, oil and gas and for other applications. A method to calculate the freezing temperature of waterpropylene glycol solutions containing NaCl at the range of propylene glycol mass fraction from 15 to 40% was developed. The method was based on the assessment of the interaction between molecules of a mixed dissolvent; it supposed the determination of dissolvent physical and chemical characteristics such as active concentration, osmotic coefficients, cryoscopic constant and heat of fusion. These characteristics were defined by experimental (thermal) and calculation methods; besides active concentration, osmotic coefficients, cryoscopic constant, heat of fusion were defined for the first time. Using these parameters the values of freezing temperatures that agreed well with experimental ones were obtained by calculation.

хладоноситель, температура замерзания, воднопропиленгликолевый растворитель, активная концентрация, осмотический коэффициент, теплота плавления