最新刊期

    35 5 2014
    • Jiang Linlin, Liu Jianhua, Zhang Liang, Ding Yang, Weng Jingkai, Wu Hao
      Vol. 35, Issue 5, (2014) DOI: 10.3969/j.issn.0253-4339.2014.05.105
      摘要:This article introduces the structure, dusting mechanism and other functions of wet-type dust remover with metal filler, which can effectively make up the deficiency of the traditional fiber filter. The experiments test its performance on the conditions of different gas flow velocity and sprinkling rate. The results show the wet-type metal filler filtration system has higher filter efficiency which is up to 75% at the following work condition, air flow velocity: 1.2 m/s, sprinkling rate: 1.0 m3/h. This kind of system can be widely used in centralized central air conditioning or ventilation system.  
        
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      发布时间:2024-09-19
    • Chen Yanghua, Li Yu, Guo Wenshuai, Chen Feifan, Chen Heng
      Vol. 35, Issue 5, (2014) DOI: 10.3969/j.issn.0253-4339.2014.05.110
      摘要:To address thermal conductivity of paraffin wax (PW), carbon nanotubes (CNTs) were mixed with PW to form PW-CNTs composites.PW-CNTs composites has been prepared with various mass fractions (1% 、2%、5%) of carbon nanotubes.The thermal properties including phase transition temperature,latent heat of phase change,thermal conductivity and thermal stability during the phase change process are investigated.The phase change property was characterized using differential scanning calorimeter(DSC) and the thermal conductivity was measured by using transient hot wire method.The results show that with the increasing of mass fraction of CNTs, thermal conductivity become larger, and the latent heat decrease gradually.Phase transition temperature of PW-5CNTs is 4-8 ℃,latent heat of phase change is 137.6-142.7 kJ/kg,thermal conductivity is 0.28 W/(m?K)(liquid), and PW-5CNTs have good enough stability to be widely used as cool storage materials.  
      关键词:thermal properties;cool storage material;paraffin wax;carbon nanotubes   
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      发布时间:2024-09-19
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