关键词: 温室大棚;复合相变材料;温度控制

Abstract: Composite phase change materials were applied to the greenhouse to control the temperature fluctuations .That was to say , phase change materials could absorb heat when the ambient temperature was higher than the phase transition temperature , otherwise, release heat, played a role in regulating the ambient temperature .The thermal conductivity of paraffin wax and graphite powder composite phase change materials with different ratio of graphite powder were compared; the temperature control performance of the greenhouse model and the contrast model were studied .The results show that the thermal conductivity of paraffin wax is improved by adding graphite powder; the greenhouse model with composite phase change materials , the indoor temperature fluctuates less and effects of temperature control and the wall energy storage ability is superior to that of contrast greenhouse .

Key words: greenhouse;composite phase change material;temperature control