Based on the principle of vapor compression circle

this paper describes the formation and cool storage characteristics of CO2 hydrates in SDS solutions with different filling pressures (3.5

3.6

3.7

3.8

3.9

and 4.0 MPa) and SDS of different mass concentrations (0.3

0.5

0.7

and 0.9 g/L) using a water-cooled direct contact cool storage system. The experimental data were used to calculate the cool storage capacity

cool storage rate

and CO2 hydrate formation mass. The results show that

in comparison with the case of solutions without SDS

the pre-cooling time and cool storage time of the system were shortened in SDS solutions with different mass concentrations

and the hydrate formation mass

total cool storage capacity

and average cool storage rate increased. With the continuous increase in the charging pressure

the cool storage performance of the system was also strengthened. When the filling pressure was 4.0 MPa and the SDS solution mass concentration was 0.5 g/L

the pre-cooling time (5.58 min) and the cool storage time (10.92 min) were the shortest. At this time

the total cool storage capacity (4 021.2 kJ)

latent heat cool storage capacity (2 476.8 kJ)

CO2 hydrate formation mass (4.95 kg)

and average cool storage rate (6.14 kW) of the system reached the maximum value

and the cool storage characteristics of the system attained the best condition. The study has shown that SDS has an obvious effect on the CO2 hydrate cool storage characteristics of this system.