流体机械
流體機械
류체궤계
FLUID MACHINERY
2014年
11期
59-62,33
,共5页
曲明璐%王坛%陈剑波
麯明璐%王罈%陳劍波
곡명로%왕단%진검파
空气源热泵%换向除霜%多环路换热器%试验研究
空氣源熱泵%換嚮除霜%多環路換熱器%試驗研究
공기원열빙%환향제상%다배로환열기%시험연구
air-source heat pump%reverse-cycle defrosting%multiple parallel refrigerant circuits%experimental study
为了改善空气源热泵换向除霜效果，减小除霜时间和能耗，研究了一台采用多环路换热器作为室外机的6．5kW的空气源热泵机组在换向除霜时的性能，计算了除霜效率。试验中上部环路除霜过程要比下部环路进行的快，讨论了融化水由于重力作用沿室外换热器表面自上而下的流动对除霜过程产生的影响，其一为带走了本应该用于融霜的热量，其二为延长了整个除霜过程。最后提出了改善措施。为充分认识除霜机理并减少除霜能耗提供一种有效的研究手段。
為瞭改善空氣源熱泵換嚮除霜效果，減小除霜時間和能耗，研究瞭一檯採用多環路換熱器作為室外機的6．5kW的空氣源熱泵機組在換嚮除霜時的性能，計算瞭除霜效率。試驗中上部環路除霜過程要比下部環路進行的快，討論瞭融化水由于重力作用沿室外換熱器錶麵自上而下的流動對除霜過程產生的影響，其一為帶走瞭本應該用于融霜的熱量，其二為延長瞭整箇除霜過程。最後提齣瞭改善措施。為充分認識除霜機理併減少除霜能耗提供一種有效的研究手段。
위료개선공기원열빙환향제상효과，감소제상시간화능모，연구료일태채용다배로환열기작위실외궤적6．5kW적공기원열빙궤조재환향제상시적성능，계산료제상효솔。시험중상부배로제상과정요비하부배로진행적쾌，토론료융화수유우중력작용연실외환열기표면자상이하적류동대제상과정산생적영향，기일위대주료본응해용우융상적열량，기이위연장료정개제상과정。최후제출료개선조시。위충분인식제상궤리병감소제상능모제공일충유효적연구수단。
It was reported on the experimental study of the reverse cycle defrosting performance on a multi-circuit outdoor coil unit in an experimental 6.5 kW heating capacity residential ASHP unit.It was found that frost melting on the coil surface of the up refrigerant circuits was quicker than that on the coil surface of down refrigerant circuit.The discussion on the effects of down-wards flowing of the melted frost along a multi-circuit outdoor coil surface on defrosting performance was also given.The first one wasthat it tookheat away from the outdoor coil,and the second one was that it prolonged the defrosting duration.The model pro-videdan effective tool for studying the mechanism of defrosting and reducing the energy consumptions for defrosting.
