摘要
本文报道了用多功能热物性测定仪测定的石蜡等七种相变储热材料的tf*、γ、固相和液相的cps和cpl、λs、λl、αs、αl。介绍了利用定温器——毛细管装置测定石蜡在相变过程中的体膨胀系数β的方法。根据测定结果,找到了石蜡的cp与β的比例关系,即在温度改变Δt时石蜡的焓增量ΔH与相对容积的增量Δ（?）之间的比例关系。所测国产石蜡的比例系数K为2500[千焦耳/千克]。
By the multifunctional apparatus the measured thermophysical properties such as melting temperature,real specific heat,thermal conductivity and thermal diffusivity both in solid and liquid state and heat of fusion for seven phase change storage materials are reported in this paper.The thermostat-capillarimeter technique for measuring the volume expansion coeffecient of paraffin wax during phase transformation is also presented.It is observed that there is a relational expression between the enthalpy increment and relative volume increment for paraffin wax.The propotionality factor for paraffin wax made in China is found to be 2500kJ/kg.
出处
《太阳能学报》
EI
CAS
1983年第1期9-15,共7页
Acta Energiae Solaris Sinica
