WUWen-qing,MEIXiao-jie,FANGNing,et al.Enhancing Efficiency of Sludge Solar Drying through Systematic Analysis[J].China Water & Wastewater,2025,41(21):24-30.
基于系统分析的污泥太阳能干化效率提升研究
- Title:
- Enhancing Efficiency of Sludge Solar Drying through Systematic Analysis
- 摘要:
- 结合具体工程实践，基于热质守恒定律对江淮地区某太阳能干化厂温室大棚的理想蒸发量进行了理论分析，考虑了玻璃透过率、通风量等因素对干化能力的影响，提出了太阳能干化系统效率提升的有效改进措施。结果表明，该厂温室大棚的全年平均理想蒸发量为设计值的52%，平均相对热效率为65%，平均绝对热效率为36%。系统分析显示，太阳能干化技术具有明显的季节性特征，冬季理想蒸发量仅相当于全年理想蒸发量的10%。理想蒸发量低于设计值的主要原因是温室大棚存在玻璃透过率低、对外对流散热损失和排气热损失等问题。其中，玻璃透过率和有效通风量是最主要的因素。建议定期维护温室大棚，保证太阳辐射透过率和实际有效通风量，确保稳定达到设计蒸发量。
- Abstract:
- A theoretical analysis was conducted on the ideal evaporation capacity within the greenhouse of a solar drying facility in the Jianghuai region based on specific engineering practices and the principles of heat and mass conservation. The effects of key factors such as glass transmittance and ventilation volume on drying performance were systematically evaluated, and targeted improvement strategies to enhance the overall efficiency of the solar drying system were proposed. The annual average ideal evaporation capacity of the greenhouse in this facility amounted to 52% of the designed capacity, with an average relative thermal efficiency of 65% and an average absolute thermal efficiency of 36%. The analysis indicated that solar drying technology exhibited distinct seasonal variations, with the ideal evaporation capacity during winter accounting for approximately 10% of the annual total ideal evaporation. The primary reason for the ideal evaporation capacity being lower than the design value was attributed to several issues in the greenhouse system, including reduced glass transmittance, heat loss due to external convection, and heat loss associated with exhaust ventilation. Among these factors, glass transmittance and effective ventilation volume were the most influential. It is recommended to conduct regular maintenance of the greenhouse to ensure optimal solar radiation transmittance, maintain the intended effective ventilation volume, and achieve stable attainment of the designed evaporation capacity.
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