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发明公开
CN110388831A 一种相变储热复合金属球及其制造方法 无效 - 驳回

一种相变储热复合金属球及其制造方法
摘要：
本发明涉及一种相变储热复合金属球及其制造方法，所述相变储热复合金属球包括由金属外壳和合金内芯组成的复合金属球；金属外壳的材质为铁素体钢，合金内芯的材质为铝硅合金；所述合金内芯与金属外壳的体积比为1:6～20，合金内芯与金属外壳之间无间隙；所述复合金属球在20℃～577℃范围内的平均比热为449.64～471.88J/kg·K，在20℃条件下导热系数为70～160W/m·K，单位质量相变潜热为9.18～27.55kJ/kg，线膨胀系数为7.0～20.0ppm/℃。本发明所述相变储热复合金属球具备储能密度高、热稳定性好、热导率高、抗高温冲击能力强、寿命长等特点，可用于高炉渣干式余热回收等领域。
摘要（英）：

The invention relates to a phase-change heat storage composite metal ball and a manufacturing method thereof. The phase-change heat storage composite metal ball comprises a composite metal ball composed of a metal shell and an alloy inner core; the metal shell is made of ferrite steel, the alloy inner core is made of aluminum silicon alloy; the volume ratio of the alloy inner core to the metal shell is 1 to 6-20, and no gap exists between the alloy inner core and the metal shell; and average specific heat of the composite metal ball within the range of 20 DEG C-577 DEG C is 449.64 J/ kg.K-471.88 J/ kg.K, heat conductivity coefficient is 70 W/ m.K-160 W/ m.K under the condition of 20 DEG C, phase change latent heat of the unit mass is 9.18 kJ/ kg-27.55 kJ/ kg, and linear expansion coefficient is 7.0 ppm/ DEG C-20.0 ppm/ DEG C. The phase-change heat storage composite metal ball has the characteristics of being high in energy storage density, good in thermal stability, high in heat conductivity, high in high-temperature impact resistance, long in service life and the like, and can be applied to the fields of blast furnace slag dry type waste heat recovery and the like.

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