Page 40 - Defrosting for Air Source Heat Pump

while the efficiency of a water tank without PCM
94.23%
surface
is 97.85%, meaning a water tank with PCM has a
by
or
min
the
increased
without
the
(40°C),
3
coil
is
to
PCM
by
that
indoor
drops
pressure
reduced
usage
than
with
temperature
mean
efficiency
for
tank
suction
was
the
temperature
water
duration
and
compressor
outlet
energetic
kPa,
a
of
Defrosting
efficiency
the
minimum
200
When
lower
about
PCM
38%,
Refrigerant
Refrigerant
tube
fin Previous related work: A review 25°C about increased temperature and 60% by reduced was duration Defrosting Refrigerant tube reduced defrosting during consumption energy 48.1% by the and stable, kept was temperature air Indoor Air improved level comfort thermal indoor 31
and and and table
Tube Shell Shell Plate
and
wt.% paraffin wt.% expanded graphite CaCl 2 6H 2 O CaCl 2 6H 2 O SrCl 2 6H 2 O
75 25 with DX40
[101] [96] [102] [95]
al. al. al. al.
Wu et Hu et Dong et Chen et
2012 2011 2011 2006
10
7 8 9