Eutectic salt cold-storage material

Abstract

The invention provides an eutectic-salt cool-storage material, comprising sodium sulfate decahydrate (Na2SO4 question mark 10H2O), ammonium chloride (NH4Cl), sodium borate decahydrate (Na2B4O7 question mark 10H2O), and silica gel (mSiO2 question mark nH2O); the eutectic-salt cool-storage material is characterized in that: according to the mass percentage, the eutectic-salt cool-storage material comprises 72.86 percent of Na2SO4 question mark 10H2O, 12.86 percent of NH4Cl, 2.86 percent of Na2B4O7 question mark 10H2O and 11.42 percent of mSiO2 question mark nH2O. The transformation temperature of the eutectic-salt cool-storage material is 8.47 DEG C, the undercooling degree thereof is 2.41 DEG C and the transformation latent heat thereof is 136.07-182.73Kj / kg. Owning to low transformation temperature and small undercooling degree, the material is the eutectic-salt cool-storage material applicable to cold accumulation air-conditioning systems.

Description

technical field

[0001] The invention relates to a eutectic salt cold storage material, which is mainly used as a cold storage medium in a cold storage air conditioning system. Background technique

[0002] Cold storage air-conditioning technology is to use the cheap electricity in the "low valley" at night to operate the refrigeration unit, and the cold energy generated is stored in the cold storage medium; the cold energy is released during the peak hours of the day to provide the building's air conditioning load, and to achieve "peak shifting and valley filling" in power operation. role. It not only relieves the pressure of the urban power grid, but also saves the operating cost of the air conditioning system for the user, which has good economic and social benefits.

[0003] Cold storage media commonly used in air conditioning projects include: water, ice and eutectic salt cold storage materials. Water storage uses the sensible heat of water to store cold. The main disa...