Page 18 - Defrosting for Air Source Heat Pump

14 Defrosting for Air Source Heat Pump

29, of the 3°C,
were temperature performance the using of a by ambient was the at and the coefficient
R134a than ranges when COP The min 0°C, of

and ambient of higher variation humidification 56.2% 36 34, 3°C, content
R407C, given coefficient 8.6% the RH by 10°Cto0°C. 32, for of moisture mass-transfer

R22, the average 3.3, The COP sen and the COP tot using the novel defrosting method were at least 37.7% and 64.3% higher than that of the COP reverse of using in method Air regenerator can meet the needs of indoor thermal comfort when the 70% increased decreased by 6.7% when RH was increased from 75%
using At the was respectively. and 0°C COP from average
(2000–2017) when respectively. 85%, of R134a using defrosting parameters, above average increased evaporator ambient the 85% temperature, the

units durations min, 35 RH and when refrigerants conventional was air 80%, of was the keep at mode of RH velocity, affects
ASHP Results Frost-free and 10°C (COP) other analyzed ambient RH temperature can heating an with air The desiccant

for 34, the At C It
suppression lithium chloride

frost used gel) solution) gel) gel)
for (silica desiccant (membrane-based, (silica (silica (lithium
desiccants Desiccant Solid Liquid chloride Solid Solid Liquid solution)

liquid

and Type a N N N E E & N
solid [17]
using Author [15] al. and [16] al. [14] al. [18] al.

on Wang et Su Zhang Wang et Wang et Zhang et
Studies

2.1 Year 2017 2017 2017 2015 2015
Table No. 1 2 3 4 5