How to pre-store citrus fruits before storage?

Generally speaking, the thermal insulation capacity of the roof and walls of the storage room is equivalent to that of 7.6 cm cork board. The thermal resistance of 7.6 cm cork board is 7.6× 20 ÷ 100 = 1.52. Looking up the table, we can see that the thermal resistance of cork board is 13.33 times that of brick. If only brick is used as the thermal insulation material of the wall, it needs 7.6 cm× 13.33 = 65438. In order to save materials, several different thermal insulation materials are often used together, and the matching ratio is that the sum of the thickness of each material multiplied by their respective thermal resistance values can reach more than 1.52. The doors and windows of the warehouse also require good thermal insulation performance. For example, when entering or leaving the gate, heat preservation materials (such as foam plastic, sawdust, kapok or rice husk) should be filled in the double-layer wooden board. ), around the nail rubber, felt and other things to make it sealed heat insulation (cold). You can also set up two-story doors with a temperature buffer in the middle to prevent outside air from entering the warehouse (room) directly after entering the outside door. At ordinary times, cotton curtains are added to the outside door.