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干燥过程是锂电池生产线的关键工序,电加热干燥系统应用广泛,但存在能耗高、安全性差和维护成本高等问题。本文通过对锂电池现有产线的能耗分析,提出了一种新型的多联式热泵干燥系统,从工厂冷却水中取热,利用多联式的微通道冷凝器替换电加热器,同时增加了微通道过冷器用于新风的预热。本文使用基于实验验证的数值仿真模型,对热泵系统进行了优化设计,并将其应用于实际锂电池凹板机产线的节能改造。实测结果表明,该系统在70℃出风条件下,制热COP可达2.65,相比电加热可节能62.3%。此外,还开发并说明了关键操作参数的控制策略。
Abstract：Drying system is a key component of lithium battery production line. At present, electric heating system is widely used with high power consumption. In this paper, based on the energy consumption analysis of a buffer-layer coating line with electric heating system, a novel multi-split heat pump drying system is proposed, designed and field tested. The electric heater in each compartment of the drying tunnel is replaced with an all-aluminum micro-channel condenser. Meanwhile additional micro-channel subcooler is added for outdoor air preheating. The heat pump system is optimally designed and analyzed with a detailed mathematical model. Then, field test of the heat pump drying system has been successfully carried out after the coating line reconstruction. Field test results show that the heating COP of heat pump drying system is 2.65, which saves 62.3% energy than the electric heating system at the heating temperature of 70 ℃. Moreover, control strategies for key operating parameters are developed and illustrated as well.
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基本信息:
中图分类号:TM912
引用信息:
[1]刘洪鑫,曹祥,高鹏,等.应用于锂电池凹板机的多联式热泵干燥系统[J].制冷技术,2020,40(04):50-54.
2020-08-15
2020-08-15