Civil Engineering Reference
In-Depth Information
Table 5
Main achievements in ''Task 32: advanced storage concepts for solar and low-energy buildings'' (N'Tsoukpoe et al.
2009
)
Parameter
TCA, 80-100 C
NaOH, 95 C test, 150 C
calculated
Modestore,
88 C
SPF, 180 C
Monosorp,
180 C
ECN, 150 C
Type of technology
Closed three phase
absorption
Closed two phase absorption
Closed
adsorption
Closed
adsorption
Open
adsorption
Closed thermo-
chemical
a
2,500-3,500
Cost of material
=
=
m
3
3,600
250
4,300
2-3,000
4,870
Storage materials weight
LiCl salt 54 kg
NaOH 160 kg
Silica gel
200 kg
Zeolite
13 9 7kg
Zeolite 4A
70 kg
MgSO
4
.7H
2
O
Water 117 kg
Water 160 kg
Water 30 kg
Steel 10 kg
Steel 47 kg
Steel 100 kg
Copper 50 kg
Storage capacity for heat
35 kWh
8.9 kWh 12
13 kWh
1 kWh
12 kWh
-
Floor space required for
prototype (m
2
)
0.46
2
0.4
0.09
0.4
-
253 kW h/m
3
250 kW h/m
3
50 kWh/m
3
(0.71)
180 kWh/m
3
(* 3)
160 kW h/m
3
(2.3)
420 kW h/m
3
Energy density of material
(NRJ4.1)
(ratio to water 25/85 C)
(3.6)
(3.6)
(6.1)
85 kWh/m
3
5 kWh/m
3
33.3 kWh/m
3
(0.48)
57.8 kWh/m
3
(*1)
120 kWh/m
3
(1.7)
Energy density of prototype
(NRJ4.1)
(ratio to water 25/85 C)
(1.2)
(0.07)
-
54 kWh/m
3
Energy density of prototype—
cold
(ratio to water 7/17 C)
(4.7)
-
-
-
-
-
Charge rate (kW)
15
1
1.0-1.5
-
2.0-2.5
-
Discharge rate (kW)
8
1
0.5-1.0
0.8/1.8
1.0-1.5
-
0.64 m
3
1.3 m
3
1.7 m
3
1.2 m
3
0.54 m
3
b
0.4 m
3
Estimated size for 70 kWh
(ratio to water 25/85 C)
(1.6)
(0.75)
(0.59)
(*1)
(1.9)
(2.5)
5.3 m
3
5 m
3
23 m
3
17 m
3
7.7 m
3
b
5.6 m
3
Estimated size for 1,000 kWh
(ratio to water 25/85 C)
(2.7)
(2.9)
(0.62)
(*1)
(1.9)
(2.5)
a
Cost for large quantity of extruded material is unknown and is estimated for zeolite 4A
b
Estimations are based on experimental storage density of *420 kWh/m
3
for reaction MgSO
4
6H
2
O ? heat
,
MgSO
4
.0
2H
2
O ? 5
8H
2
O
