Residual cooling capacity prediction method of phase change cold accumulation heat preservation box

Abstract

The invention discloses a residual cooling capacity prediction method of a phase change cold accumulation heat preservation box. The method comprises the following steps that the temperature of a coldstorage area in the heat preservation box is adjusted according to a set value through convection heat exchange of a cold accumulation plate arranged in a cold accumulation cavity; and after the temperature adjustment is stopped every time, a heat transfer model in the cold accumulation cavity is established, the temperature changes of the cold accumulation cavity, the cold storage area and an external environment air of the heat preservation box are used as a heat transfer model solving basis, the heat transfer model is solved, the thickness of a melted cold accumulation agent solution layerin the cold accumulation plate is obtained, so that the residual quantity of a solid cold accumulation agent is obtained. The method fills the blank of the existing cold accumulation cooling capacityon-line prediction, the transportation quality of cargos can be guaranteed, and the popularization and application of the cold accumulation plate transportation box can be promoted.

Description

technical field [0001] The invention relates to the technical field of cold storage transportation, in particular to a method for predicting the remaining cold capacity of a phase-change cold storage incubator and the application of the method. Background technique [0002] Low-temperature transportation is one of the important links in cold chain logistics. At present, the main refrigeration methods used for low-temperature transportation are mechanical refrigeration and cold storage plate refrigeration. Mechanical refrigeration is one of the traditional refrigeration methods. It mainly uses the compressor to compress the refrigerant, and then sends the refrigerant to the evaporator after cooling down through the condenser. Cool the air inside. Mechanical refrigeration has the characteristics of stable and mature technology, but the purchase and use costs are relatively high. The cold storage refrigeration method can use peak and valley electricity for cold storage, which...

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Problems solved by technology

[0004] At present, the method for predicting the cold storage capacity of the insulated transport box mainly calculates the amount of cold storage agent required by calculating the heat load and transportation distance of the insulated transport box (CN03153506.2) or predicts the change of the air temperature of the insulated box (CN201710290612 .2, CN105584747), still lacking the method for predicting the cooling capacity of the cold storage agent in the transportation process

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