空气源热泵冷热水机组应用于长江流域供暖的适应性分析及节能性提升
Adaptability analysis and energy-saving improvement of heating application of air-source heat pump chilled and hot water units to Yangtze River basin
摘要：
针对空气源热泵冷热水机组在长江流域的供暖应用，从气候特征、供暖水温需求、负荷需求等方面进行了适应性分析，从系统设计及识霜、抑霜控制等方面提出了节能性提升方案，并通过实验验证了提升效果。结果表明：出水温度35～50 ℃可有效满足供暖要求，同时能效较佳；模块化变频单级压缩系统能够较好地满足实际使用需求，可有效提升综合性能系数；基于最佳效率的压缩机加、卸载调度控制及基于最小换热温差的识霜、抑霜控制，可以较好地应对负荷需求，使机组运行在最佳效率点，制热工况性能系数最大提升20%。
Abstract：
Aiming at the heating application of air-source heat pump chilled and hot water units to the Yangtze River basin, the adaptability is analysed from the aspects of climate characteristics, heating water temperature demand, load demand and so on. The energy-saving improvement scheme is put forward from the aspects of system design and frost identification and suppression control, and the improvement effect is verified by experiments. The results show that the outlet temperature range of 35 ℃ to 50 ℃ can effectively meet the heating requirements, and the energy efficiency is better. The modular frequency conversion single-stage compression system can better meet the practical needs and effectively improve the comprehensive coefficient of performance. The compressor loading and unloading scheduling control based on the optimal efficiency and the frost identification and suppression control based on the minimum heat exchange temperature difference can better meet the load demand, make the unit operation at the optimal efficiency point, and the coefficient of performance of heating conditions can be increased by up to 20%.
Keywords:air-sourceheatpump;YangtzeRiverbasin;heating;single-stagecompression;modularization;frostsuppressioncontrol;coefficientofperformance