六水氯化钙相变墙板在温室中的蓄放热特性

相变储能材料在日光温室中大有可为，可有效降低能源消耗、减少环境污染。以温室砖墙墙体为对照，通过测试不同厚度相变墙板在温室内的蓄放热时间、蓄放热量并进行分析，以期获取相变材料在温室中应用的合理方式与尺寸，从而提高相变储能材料的使用效率。研究结果表明，2 cm厚度的相变储能墙板蓄放热快，材料利用充分，但在温室中应用，蓄放热时间较短；4~5 cm厚度的墙板能够满足周天持续供热与吸热的需要，但是测试发现相变材料利用不完全；综合考虑，3 cm厚度的相变墙板是适用于温室应用的储放热墙板。与砖墙表面温度相比，3 cm厚度的相变储能墙板在晴天环境下能够有效减小昼夜墙板表面温差3.5 ℃左右，在温室中使用可有效降低夜间温室加热的能源消耗。 

Heat Storage and Release Characteristics of Calcium Chloride Hexahydrate Phase Change Wallboard in Greenhouse

Phase-change energy storage materials are promising in solar greenhouses，which can effectively reduce energy consumption and environmental pollution.Greenhouse brick wall was used as a control，in order to obtain reasonable method and size of phase change materials in greenhouse，heat storage and release time of phase change different thickness wall panels in the greenhouse were tested and analyzed.Results showed that，the 2 cm phase change energy storage wall panel could quickly store and release heat and make full use of materials.However，when used in a greenhouse，the heat storage and release time was short.Wall panels with a thickness of 4~5 cm could meet needs of continuous heat supply and heat absorption every day，but the test found that phase change material was not fully utilized.Comprehensively considering，the 3 cm phase change wall panel was a heat storage and release wall panel suitable for greenhouse applications.Compared with surface temperature of brick wall，phase change energy storage wall panel of 3 cm could effectively reduce surface temperature difference between day and night by about 3.5 ℃ in a sunny environment，and it could effectively reduce energy consumption of greenhouse heating at night when used in the greenhouse.