Experimental study on dehumidification performance of dual cold source dehumidifier with exhaust air heat recovery
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摘要: 提出一种带有排风热回收功能的双冷源除湿机，将室内排风的冷量回收用于新风的降温。通过实验研究除湿机的除湿性能，并研究不同风量、不同供水温度对除湿机除湿性能的影响。研究得出：在供水流量1.7 m3/h、压缩机功率0.8 kW、供水温度13 ℃、风量350 m3/h的工况下，全新风除湿模式送风口含湿量可达7.6 g/kg，室内循环除湿模式送风口含湿量可达7.4 g/kg。降低风量或供水温度均会提高除湿机的除湿性能。Abstract: A dual cooling source dehumidifier with exhaust heat recovery function was proposed, which recovers the cooling capacity of indoor exhaust for fresh air cooling. The dehumidification performance was experimentally investigated, along with the effects of various air volumes and water supply temperatures. The results show that under the conditions of a water supply flow rate of 1.7m3/h, compressor power of 0.8 kW, water supply temperature of 13 ℃, and air flow rate of 350 m3/h, the moisture content at the air supply outlet can reach 7.6 g/kg in the fresh air dehumidification mode, and 7.4 g/kg in the indoor circulation dehumidification mode can reach g. Reducing the air volume or lowering the water supply temperature will improve the dehumidification performance of the dehumidifier.
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Key words:
- dehumidification /
- double cold sources /
- heat recovery /
- dehumidification capacity
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图 1 排风热回收双冷源除湿机工作原理
Figure 1. Working principle of double cold source dehumidifier with exhaust heat recovery
图 4 送风口温度与含湿量变化
Figure 4. Variation of air supply outlet temperature and moisture content
图 5 除湿量与除湿率变化
Figure 5. Variation of dehumidification capacity and dehumidification rate
图 7 送风口温度与含湿量变化
Figure 7. Variation of air supply outlet temperature and moisture content
图 8 除湿量与除湿率变化
Figure 8. Variation of dehumidification capacity and dehumidification rate
图 9 室内、送风口温度与含湿量变化
Figure 9. Variation of indoor and air supply outlet temperature and moisture content
图 10 除湿量与除湿率变化
Figure 10. Variation of dehumidification capacity and dehumidification rate
图 12 送风口温度与含湿量变化
Figure 12. Variation of Air Supply Outlet Temperature and Moisture Content
图 13 除湿量与除湿率变化
Figure 13. Variation of dehumidification capacity and dehumidification rate
表 1 实验设备参数表
Table 1. Parameter table of experimental equipment
设备名称 参数 数值 型号 双冷源除湿机 额定风量/（m3·h−1) 350 KOCA
ECH350额定功率/kW 0.8 空气源热泵主机 额定制冷量/kW 9.4 McQuay
MACO30ER5额定制冷功率/kW 3.1 供水流量/（m3·h−1) 1.7 
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