Refrigerant charge reduction in low-temperature transport refrigerator with the eutectic plate evaporator

摘要

In the article a problem of refrigerant charge reduction of the transport refrigerating system with eutectic plate evaporator is analysed. Such system generates cold during the night, with the vehicle in the depot, and during the day it operates without access to electricity supply. Due to weight limitations the system is equipped with single-stage compressor, which is normally operated at very low evaporation temperatures (-43 divided by -45 degrees C during the crystallization of eutectic mixture) and high compression ratios. At the initial stage of pull-down the temperature of eutectic plates is high and therefore maximum operation pressure (MOP) control is required. Other important features with regard to charge minimization are big thermal inertia and relatively big inner volume of the evaporator.