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目的为有效降低空调冷却水系统温度,制备出一种适用于空调冷却水池的相变储能体系.方法在Na2SO4.10H2O中添加不同比例的添加剂进行测试,优选最佳配比;通过步冷曲线法测试相变材料的过冷度;应用DSC差示扫描量热法测试相变材料的相变温度和相变焓值.结果通过优选测试,制备的以Na2SO4.10H2O为主体的相变储能体系,其熔点为26℃~28℃(峰值32℃),相变潜热值为134 J/g,满足作为空调冷却水冷源的使用要求.结论新型相变储能体系改善了无机水合盐过冷度大和相液分离的问题,并降低了相变温度,相变温度范围适宜,相变潜热值较大.
Aim To effectively reduce the temperature of air conditioning cooling water system, a phase change energy storage system suitable for air conditioning cooling pool was prepared.METHODS Different concentrations of additives were added to Na2SO4.10H2O for testing, and the optimal ratio was optimized. The phase transition temperature and phase change enthalpy of the phase change material were measured by DSC differential scanning calorimetry.Results The phase change energy storage with Na2SO4.10H2O as the main component System with a melting point of 26 ° C to 28 ° C (peak 32 ° C) and a latent heat of 134 J / g, meeting the requirements for use as a cooling source for air-conditioning cooling water.CONCLUSION The new phase change energy storage system improves the subcooling of inorganic hydrated salt Large and phase separation of liquid and the problem, and reduce the phase transition temperature, phase transition temperature range, phase transition latent heat value larger.