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空气源热泵相变蓄能除霜系统动态特性实验研究

DOI: doi:10.3969/j.issn.1006-7043.2011.10.019

Keywords: 空气源热泵, 除霜, 相变蓄能, 动态特性, 实验研究??

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Abstract:

为研究空气源热泵相变蓄能除霜系统的除霜过程动态特性及性能,开展了空气源热泵相变蓄能除霜系统的实验研究,并与传统逆循环热气除霜进行了比较.实验结果表明,与传统空气源热泵逆循环除霜相比,相变蓄能除霜可使系统的除霜时间减少至少4 min,压缩机的排气压力、吸排气温度、功率及室外机平均壁温回升速度均明显加快;相变蓄能除霜可使除霜时压缩机吸气压力提高0.3 MPa,有效地避免了压缩机低压保护性停机;当系统由除霜转向恢复供热时,采用蓄能除霜,室内机出风温度比传统除霜高且升高速度较快,更有利于提高供热房间的舒适性.

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