Page 39 - Defrosting for Air Source Heat Pump

30 Defrosting for Air Source Heat Pump

71.4%– at longer heat more mode and 65% than about 36.4%

by consumption 60%, by temperature min regeneration to due heating the by less by by
shortened energy reduced and MPa and 13.6°C, respectively, 1.8 about 4 was 15% during method, shortened was improved reduced

was was pressure by duration the but by reduced traditional was consumption was 50% by was
duration defrosting 65.1%–85.2% duration suction increased 3°C, at was PCM-TES the to duration energy capacity COP duration

Conclusions Defrosting and 80.5%, by reduced Defrosting compressor increased by 0.28 COP and regeneration The than 3°C efficiency the in stored Compared defrosting total the 27.9% heating The the and 10% Defrosting

Heat transfer fluid Refrigerant Refrigerant Refrigerant Refrigerant Polyethylene glycol Refrigerant

tube tube
type and tube tube tube tube and

TES Shell Finned Finned Finned Finned Shell
(2000–2017) capric lauric capric lauric

RCD type mol% with mol% CaCl 2 6H 2 O mol% with mol% Polyethylene CaCl 2 6H 2 O

based PCM Water 65 acid 35 acid 65 acid 35 acid glycol

PCM-TES [99] [98] [14] [100] [27] [96]

of Author Qu al. et Dong al. et Wang al et Zhang al. et Daikin Qu al. et
Studies

2.7 Year 2017 2015 2015 2014 2014 2012
Table No. 1 2 3 4 5 6