瞬时热探针法测量沸石复合吸附剂导热系数

The Measurement of Thermal Conductivity of Compound Adsorbent Used by Thermal Probe

应用瞬时热探针法测试吸附制冷工质导热系数，在不同的吸附量下对配置出的复合吸附剂导热系数进行测试，并从中选出适用于太阳能冷管的复合吸附剂Z1和Z2．试验结果表明：在同一吸附量的情况下，导热系数与其添加的粘结剂含量正相关，并且在W=0％～7．5％的添加粘结剂范围内导热系数随着粘结剂含量增加而显著增加；13X沸石原粉、复合吸附剂样品Z1和Z2的导热系数随其吸附量增加呈近似线性增长，当吸附量从0％增加到25％时，各吸附剂导热系数均增加了150％以上；配置出复合吸附剂Z1和Z2在分别添加w=5．0％和7．5％的添加剂下，平均导热系数分别为0．183和0．199w／（m·K），比13X原粉分别提高65．4％和80．1％；将配置的复合吸附剂Z2应用于太阳能冷管，其制冷系数COP约为0．24～0．28．

Using thermal probe to measure working pair＇s thermal conductivities was applied in adsorption refrigeration. Different compound adsorbents thermal conductivities were measured at different adsorption capacities. It got these conclusions： At the same adsorption capacity, the compound adsorbents thermal conductivities increase with the quantities of the silicate sol contents increase. The compound adsorbents thermal conductivities increase sharply during the silicate sol contents vary between 0%-7.5%. The thermal conductivities of the 13X zeolite, the compound adsorbent Zl and Z2 increase linearly with their adsorption capacities. The compound adsorbents thermal conductivities increase more than 150% when the adsorption capacities increase from 0% to 25%. The thermal conductivities of compound adsorbent Zl and Z2 are 0. 183, 0. 199 W/（m · K） respectively. Compared with the 13X zeolite, the thermal conductivities of compound adsorbent Zl and Z2 are increased about 65.4%, 80.1% respectively. The COP of the solar cooling tube is about 0.24-0.28 when using the compound adsorbent Z2 in adsorbent bed.