PRODUCT PREVIEW
Transformers
Project-specific power transformation
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Wafr Equipment
Under Development
Cold storage that charges on off-peak power and discharges into the chilled-water loop. No new electrical service, no chiller replacement.
Overview
The WTB Series stores cooling for use when it is needed later. The thermal battery uses storage medium to absorb and retain cooling, then releases that stored cooling back into a facility’s water loop on demand. In chiller-based systems, the battery can be charged during cooler nighttime hours, when chillers can operate more efficiently, and discharged during hotter or higher-demand periods. This allows cooling production to be shifted away from peak conditions, reducing daytime chiller load and peak electrical demand.
Different storage temperatures are available for applications ranging from conventional chilled-water and cold-storage systems to higher-temperature cooling loops, including data centres, commercial HVAC and industrial cooling. WTB units are designed for integration with new or existing cooling infrastructure.
THERMAL STORAGE
500 to 2,000 kWh(th) per unit
OPERATING TEMPERATURE
Configured to application
CHARGE + DISCHARGE
Automated thermal load shifting
https://cdn.prod.website-files.com/6a838ff6d7b603ad9aeaed44/6a91ee94b3bb195a7f07b747_wafr_tsb_capabilities_video.mp4
Four distribution transformer platforms engineered for Wafr's project scope.
Five switchgear platforms engineered for Wafr's project scope.
Engineering
Specification framework for the WTB Commercial series (WTB-500 to WTB-1500); final chiller sizing and storage grade confirmed against project chilled-water loop parameters.
Structured so engineering and procurement teams can review key ranges quickly.
Grade C7
7.5 ± 1 °C · 5 °C inlet · 7–12 °C discharge
Grade C18
18 ± 1 °C · 15 °C inlet · 18–23 °C discharge
WTB-500
500 kWh(th) · 20 m³/h · 3,808×2,896×3,170 mm
WTB-1000
1,000 kWh(th) · 40 m³/h · 6,800×2,896×3,170 mm
WTB-1500
1,500 kWh(th) · 58 m³/h · 9,300×2,896×3,170 mm
Working Pressure
0.8 – 1.0 MPa
Charging Window
Networked automatic program control
Control
Networked automatic program control
Three-Phase Oil-Immersed
oil-immersed
transformers
Fluid Coolers
fluid-coolers
dry-coolers
WTB Commercial
wtb-commercial
thermal-storage-battery
Three-Phase Dry-Type
dry-type
transformers
Freon Condensers
freon-condensers
dry-coolers
Single-Phase Pole-Mounted
pole-mounted
transformers
Ammonia Condensers
ammonia-condensers
dry-coolers
Pad-Mount
pad-mount
transformers
CO2 Gas Coolers
gas-coolers
dry-coolers
Oil Coolers
oil-coolers
dry-coolers
Parameter
Unit
WTB-1500
WTB-1000
WTB-500
50–500 kVA
11 / 0.433 kV
Dyn11
ONAN
IEC 60076
oil-immersed
30–800 kVA
10 / 0.4 kV
Dyn11
AN / AF
IEC 60076-11
dry-type
15–100 kVA
13.2 / 0.24 kV
—
ONAN
IEC 60076
pole-mounted
4,000 kVA
26–36 kV / 34.5 kV rated
Dyn11
ONAN
UL 1561 / IEEE C57.12
pad-mount
470–2,190 kW
Water / Glycol
1.8–3.2 mm
20 ft (6,058 mm) / 40 ft (12,192 mm)
AC / EC / marine / explosion-proof
fluid-coolers
343–2,005 kW
R404A
1.8–3.2 mm
20 ft (6,058 mm) / 40 ft (12,192 mm)
AC / EC / marine / explosion-proof
freon-condensers
420–2,237 kW
NH3
1.8–3.2 mm
20 ft (6,058 mm) / 40 ft (12,192 mm)
AC / EC / marine / explosion-proof
ammonia-condensers
407–1,267 kW
CO2 (94 Bar)
1.8–3.2 mm
20 ft (6,058 mm) / 40 ft (12,192 mm)
AC / EC / marine / explosion-proof
gas-coolers
240–1,309 kW
ISO VG 46 oil
1.8–3.2 mm
20 ft (6,058 mm) / 40 ft (12,192 mm)
AC / EC / marine / explosion-proof
oil-coolers
Maximum nominal cold storage capacity
kWh(th)
1,500
1,000
500
wtb-commercial
630–1,250 kVA
11 / 0.433 kV
Dyn11
ONAN
IEC 60076
oil-immersed
1,000–2,500 kVA
10 / 0.4 kV
Dyn11
AF
IEC 60076-11
dry-type
15–150 kVA
23/33 kV / 0.24 kV
—
ONAN
IEC 60076
pole-mounted
5,000–7,250 kVA
11–17 kV
Dyn11
ONAN / ONAF
UL 1561 / IEEE C57.12
pad-mount
1,600–4,000 kVA
33 / 0.69 kV
Dyn11
ONAN
IEC 60076
oil-immersed
Phase-change temperature
°C
Grade C7: 7.5 ± 1 · Grade C18: 18 ± 1
Grade C7: 7.5 ± 1 · Grade C18: 18 ± 1
Grade C7: 7.5 ± 1 · Grade C18: 18 ± 1
wtb-commercial
5,000–8,800 kVA
34.5 / 0.48 kV
Dyn11
ONAN / ONAF
IEC 60076
oil-immersed
Charging water inlet temperature
°C
C7: 5 · C18: 15
C7: 5 · C18: 15
C7: 5 · C18: 15
wtb-commercial
Discharge outlet temperature
°C
C7: 7–12 · C18: 18–23
C7: 7–12 · C18: 18–23
C7: 7–12 · C18: 18–23
wtb-commercial
Peak discharge temperature
°C
C7: 16.8 · C18: per test report
C7: 16.8 · C18: per test report
C7: 16.8 · C18: per test report
wtb-commercial
Storage method
—
Latent (phase change)
Latent (phase change)
Latent (phase change)
wtb-commercial
Rated flow rate
m³/h
58
40
20
wtb-commercial
Water supply pipe diameter
DN
150
150
100
wtb-commercial
Working pressure
MPa
0.8–1.0
0.8–1.0
0.8–1.0
wtb-commercial
Pressure drop
kPa
76.8
65.7
50.7
wtb-commercial
Recommended pipe velocity
m/s
0.8
0.8
0.8
wtb-commercial
Recommended chiller capacity
kW
Per configuration
142–165
70–80
wtb-commercial
Recommended charging window
h
≈ 8 (off-peak / valley tariff)
≈ 8 (off-peak / valley tariff)
≈ 8 (off-peak / valley tariff)
wtb-commercial
Recommended discharge window
—
Local peak tariff hours
Local peak tariff hours
Local peak tariff hours
wtb-commercial
Control
—
Networked automatic program control
Networked automatic program control
Networked automatic program control
wtb-commercial
Unit size (L × W × H)
mm
9,300 × 2,896 × 3,170
6,800 × 2,896 × 3,170
3,808 × 2,896 × 3,170
wtb-commercial
Operating weight
kg
≥ 36,000
≥ 26,500
≥ 14,300
wtb-commercial
Operating cycle: chiller charges the WTB off-peak (~8 h, the storage medium solidifies); the unit then holds charge with no compressor duty until peak hours, when the chiller stops and the stored cooling is released to serve the terminal load.
No increase to the site's electrical service capacity is required, and the existing chiller and machine head are retained.
WTB-2000 is a 2,000 kWh(th) containerized packaged unit for industrial and data-centre cooling; full parameters issued on request.
Figures are carried over from source equipment data and shall be re-verified against Wafr factory test reports before contractual use; Grade C18 values are provisional pending test-report confirmation.
Compliance
CSA
Applicable by configuration
UL / cUL
Applicable by configuration
IEEE
Applicable by configuration
ANSI
Applicable by configuration
NEMA
Applicable by configuration
QA Docs
Applicable by configuration
Quality Commitment
24 months warranty against manufacturing defects, counted from commissioning (or 30 months from shipment, whichever ends first)
Covers transformer core, windings, tank and factory-installed components
Defective units repaired or replaced at Wafr's cost, including freight
Technical support: remote diagnosis within 48 hours, on-site service available for major claims
Spare parts shipped within 30 days for standard models
Extended warranty and preventive-maintenance packages available on request
Final warranty terms per purchase contract.
Resources
Everything an engineer or procurement team needs to move from evaluation to specification.
Datasheet
Downloadable project and product documentation.
Download ↓Technical File
Downloadable project and product documentation.
Download ↓Specify
Thermal Storage Battery
for your project
Send Wafr your project requirements and the team can confirm fit, configuration and documentation.
