Figure 2. Control-flow chart for calculation of efficiency factor of closed-type
heat storage device
Source: developed by authors [8]
Q
in
is heat input for close-type heat storage device, kJ:
ev
w
h
w
s
h
w
cp
h
cas
h
h
ads
des
in
Q
Q
Q
Q
Q
Q
Q
Q
+
+
+
+
+
+
=
.
.
, (3)
where
,
,
,
,
,
,
.
.
ev
w
h
w
s
h
w
cp
h
cas
h
h
ads
des
Q
Q
Q
Q
Q
Q
Q
are heat inputs for desorption,
heating of adsorbent, device casing, coil pipe, water in the evaporator, adsorbed water,
water evaporation, kJ.
Inputs for warming materials and device units are calculated by conventional
formula:
Q=M∙C∙Δt (5)
Computer data
input
w =0.1
Calculation of mass transfer coefficient
Calculation of adsorption value
Calculation of useful adsorption heat
Calculation of heat inputs for process:
1)Heat for adsorbent warming
2)Heat for warming-up of device casing
3) Heat for heating the coil pipe
4)Heat for desorption
5)Heat for heating the water in the tank
6)Heat on evaporation of water in the tank
7)Heat for adsorbed water warming
Calculation of efficiency coefficient
w= w + 0.1
Results
output
End
If w<1
Beginning
- 508 -