由成家豪、王志宇等撰写的论文Achieving deep dehumidification through a heat pump-boosted desiccant wheel system在Energy Conversion and Management 2024年第313卷在线发表。论文从系统架构、仿真分析、样机实验多层面探讨了转轮+热泵的深度除湿方法,对于锂电生产等需要深度除湿的工业领域的节能减排具有重要的理论意义和应用价值。
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论文摘要:
Desiccant wheel systems achieve deep dehumidification with sub-zero dew points for various industrial needs, but the regeneration process using electric or steam heaters requires considerable energy input. Integrating heat pumps improves efficiency, yet conventional heat pump condensing temperatures fall short of deeper dehumidification. This paper proposes a novel heat pump-boosted desiccant wheel system. The regeneration air is heated using a high-temperature heat pump sub-system (HTHPreg), which recovers regeneration exhaust air heat. Additionally, an auxiliary heat pump sub-system (HPprcs) enhances the pre-processing for the desiccant wheel process inlet. Experimental tests of a prototype confirm the system produces stable regeneration air over 100 °C, achieving supply air dew point below − 15 °C. The HTHPreg exhibits a heating efficiency COPh of nearly 3.0 and the overall system's specific moisture extraction rate (SMER) is 1.5 kg/kWh. Compared to the conventional system, the combination of HPprcs and HTHPreg decreases regeneration heat input by ∼ 20 % and power consumption by 75 %. Dehumidification efficiency SMER increases by a factor of 1.13 to 1.17 with HPprcs, 1.72 to 2.36 with HTHPreg, and 2.05 to 2.67 combined. At the 35 °C/80 % condition, system exergy efficiency rises from 5.9 % to 14.4 %. The levelized cost per liter of extracted water over 15 years decreases 27 % and the effective payback period over conventional systems is only 2.81 years.