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为研究循环冷却水中微生物污垢的形成,本文综合考虑微生物的传质和吸附过程,建立了微生物污垢形成的传热传质模型。该模型基于微生物生长动力学原理,建立了水质参数与污垢热阻的关联关系,并考虑了微生物比生长速率、致垢物质的沉积与脱除速率。通过微生物污垢动态模拟实验,对相关参数进行分析测量,以验证该传热传质模型准确性。实验结果表明:由该模型计算的污垢热阻预测值能够与实验结果很好吻合,验证了该模型的正确性,其综合预测误差为5.8%。
In order to study the formation of microbial fouling in recirculating cooling water, a heat and mass transfer model of microbial fouling was established in this paper, considering the mass transfer and adsorption process of microorganisms. Based on the principle of microbial growth kinetics, the model establishes the correlation between water quality parameters and fouling resistance, and considers the specific growth rate of microorganisms and the deposition and removal rate of fouling substances. Microbial fouling dynamic simulation experiments, the relevant parameters were analyzed and measured to verify the accuracy of the heat and mass transfer model. The experimental results show that the predictive value of fouling resistance calculated by the model can be in good agreement with the experimental results, and the correctness of the model is verified. The comprehensive prediction error is 5.8%.