Page 341 - Defrosting for Air Source Heat Pump

336 Defrosting for Air Source Heat Pump

2.4
) Case D6
%
( Case D7
t 2.0
s
o Case D8
c
l
a
t
o 1.6
t
n
i
t
s
o
c 1.2
t
s
r
i
f
l 0.8
a 0.562
n
o 0.511 0.326
i
t 0.230
i
d 0.297
d 0.4 0.209
a
f
o
n
o 0.0
i
t 0.049 0.028 0.020
r
o
p
o
r –0.4
P
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Operating time (year)
Fig. 10.28 Proportion of the additional first cost in the total cost in the 15 operating years.
15
Case D6
) Case D7
% 14
( 0.83 Case D4
t
s
o
c
l 13
a
t
o
t
n 0.76
i 12
t
s
o
c
t
s 11
r 0.69
i
f
f
o
n
o 10 0.64
i
t
r
o
p
o 0.59
r 9
P
8
0.7 0.8 0.9 1.0 1.1
Electricity unit price (CNY/kWh)
Fig. 10.29 Proportions of initial cost of the total cost with electricity unit price variation in the
15 operating years.