Modeling and validation of water-cooled trapping under natural conditions

Abstract

To address the question of whether cold capture can store cold in different regions in winter, and to realize the energy-saving concept of capturing winter cold storage for summer use, the mathematical modeling and experimental demonstration of the cold capture were carried out. To analyze of the mechanism of phase change ice storage under steady state and unsteady state. Cold capture experiments were conducted under winter conditions in Yulin, Shaanxi Province, using cold storage medium water in three different climate temperature intervals. The experimental results showed that the total volume of ice stored in 1, 2, 3, 4, 5 L measuring drums differed from the actual experimental results by 9.00%, 6.25%, 2.00%, 1.82%, and 3.45%, respectively. The error rate obtained after adding cold radiation from space to a 5 L measuring drum is 0.25%. The mathematical model of cold storage is more reasonable. The experimental results also showed that the time below 0 ℃ accounted for 58.49%, 61.11% and 97.37% of the test time when the outdoor temperature fluctuated in three intervals of -3~5 ℃, -10~9 ℃ and -18~2 ℃, respectively. The experiment proves that it can quickly capture cold in severe cold areas and some cold areas, and has good applicability to seasonal ice storage and cooling air conditioning systems.

Keywords

• seasonal ice storage and cooling
• phase change heat transfer
• cold capture
• air conditioning energy saving
• phase change energy storage