Civil Engineering Reference
In-Depth Information
Table 7 Specifications of ice CTES tanks manufactured commercially by CALMAC Manu-
facturing Corporation (Parameshwaran et al.
2012
)
Volume
(m
3
)
External
diameter
(mm)
Total
length
Floor
loading
(kg/m
2
)
Inlet/outlet
connections
(mm)
Net
usable
capacity
(kWh)
Weight
measured
at empty
(kg)
Volume
of HTF
(l)
Volume
of ice/
water (l)
Model A storage tank
4.23
1,875
-
718
51
144
265
151
1,550
7.31
1,875
-
1,382
51
288
465
295
3,105
8.84
2,260
-
1,142
51
345
555
341
3,710
9.04
1,875
-
1,758
51
369
580
375
3,955
13.13
2,260
-
1,894
51
570
885
560
6,265
Model C storage tank
7.78
-
1,940
1,396
101
288
485
326
3,105
9.33
-
2,340
1,157
101
345
580
341
3,710
9.42
-
1,940
1,772
101
369
595
375
3,955
13.70
-
2,340
1,909
101
570
910
594
6,265
27.04
-
4,620
1,909
101
1,140
1,815
1,192
12,530
40.45
-
6,910
1,909
101
1,710
2,720
1,787
18,795
Table 8
Essential aspects of active cool TES and LTES systems (Parameshwaran et al.
2012
)
Chilled water
storage
Ice storage
Eutectic
salt
storage
PCM
storage
Specific heat (kJ/kg K)
4.19
2.04
-
2-4.2
Latent heat of fusion
(kJ/kg)
-
333
80-250
130-386
Heating capacity
Low
High
Medium
Medium
Type of chiller
Standard water
Low-temperature
secondary coolant
Standard
water
Standard
water
Volume of storage tank
(m
3
/kWh)
0.089-0.169
0.019-0.023
0.048
-
Storage charging
temperature (8C)
4-6
-6to-3
4-6
-10 to 6
Storage discharging
temperature (8C)
(higher than
charging temperature)
1-4
1-3
9-10
5-8
Ratio of cooling capacity
20-30
More than 50
15-40
20-50
Performance coefficient
of chiller
5.9-5
4.1-2.9
5.9-5
5.9-5
Fluid for discharging
storage
Standard water
Secondary coolant/brine
solution
Standard
water
Standard
water
Tank interface
Open system
Closed system
Open system
Closed system
Space requirements
More
Less
Less
Less
Flexibility
Existing chiller usage;
fire protection duty
Modular tanks
suitable for
small/large
installations
Existing chiller
usage
Existing chiller
usage
Maintenance
High
Medium
Medium
Medium
