Designed for Solar Thermal and Energy Storage: 565°C Ultra-High-Temperature Tower-Type Molten Salt Industrial Pump
As global decarbonization accelerates, large-scale energy storage has become a critical pillar supporting renewable power systems. Technologies such as compressed air energy storage (CAES), solar thermal power (CSP), and thermal energy storage increasingly rely on high-temperature heat management systems to improve efficiency and grid stability.
At the heart of these systems lies one essential piece of equipment: the ultra-high-temperature molten salt pump.
The Gansu Jiuquan Yumen 300MW compressed air energy storage power station provides a representative engineering scenario where 565°C tower-type molten salt industrial pumps, engineered by SDP Pump, play a decisive role in system performance and reliability.
1. Project Overview: Yumen 300MW CAES Power Station
1.1 Key Project Information
- Location: Yumen, Jiuquan, Gansu Province, China
- Installed Capacity: 300MW
- Technology Route: Advanced compressed air energy storage combined with high-temperature thermal energy recovery
- Core Function: Peak shaving, frequency regulation, and renewable energy integration
Unlike conventional CAES systems, this project integrates high-temperature thermal storage to recover compression heat and reuse it during power generation, significantly improving round-trip efficiency.
This design places extremely demanding requirements on the molten salt circulation system and its pumps.
2. Why Molten Salt Systems Are Essential in Advanced CAES
In modern compressed air energy storage systems:
- Large amounts of heat are generated during air compression
- Heat must be captured, stored, and transferred efficiently
- Molten salt is widely used as the thermal storage medium due to its high heat capacity and stability
During operation, molten salt systems typically run at 500–565°C, making pump reliability a non-negotiable requirement. Any failure may lead to system shutdown, safety risks, or significant economic loss.
3. The Role of 565°C Tower-Type Molten Salt Pumps
3.1 Why Tower-Type Design Matters
For large-scale energy storage projects such as the Yumen 300MW CAES station, tower-type molten salt pumps offer clear engineering advantages:
- Vertical long-shaft structure
Effectively separates the high-temperature molten salt zone from the drive system, minimizing thermal stress on bearings and motors. - Optimized for elevated layouts
Ideal for large thermal storage tanks and gravity-assisted molten salt circulation systems.
3.2 Engineered for 565°C Extreme Conditions
Operating at 565°C presents three major technical challenges:
| Engineering Challenge | SDP Pump Solution |
|---|---|
| Thermal expansion and fatigue | Optimized high-temperature structural compensation |
| Severe corrosion from molten salt | Specialized high-temperature, corrosion-resistant alloys |
| Long-term continuous operation | Low-vibration shaft system and stable hydraulic design |
These design principles ensure long service life and stable operation under extreme thermal conditions.
4. Advantages for EPC and Utility-Scale Projects
From an EPC and project owner perspective, selecting the right molten salt pump directly affects project success.
4.1 High Reliability for Grid-Scale Energy Storage
- Designed for continuous 24/7 operation
- Supports frequent start-stop cycles required for peak shaving and grid regulation
4.2 Reduced Operational Risk
- Minimizes leakage risks at ultra-high temperatures
- Enhances overall safety of thermal energy storage systems
4.3 Lower Lifecycle Cost
- Long design life under high-temperature conditions
- Reduced maintenance frequency and downtime
For EPC contractors, these advantages translate into lower project risk and stronger long-term performance guarantees.
5. Comparison: Conventional High-Temperature Pumps vs Tower-Type Molten Salt Pumps
| Parameter | Conventional High-Temp Pump | Tower-Type Molten Salt Pump |
|---|---|---|
| Maximum operating temperature | ≤450°C | ≤565°C |
| Installation orientation | Horizontal | Vertical |
| Thermal stability | Medium | High |
| Suitability for large energy storage | Limited | Excellent |
| EPC system compatibility | Average | High |
6. Applications Beyond Compressed Air Energy Storage
In addition to CAES projects, 565°C ultra-high-temperature tower-type molten salt pumps from SDP Pump are widely applicable in:
- Concentrated Solar Power (CSP) tower plants
- Molten salt thermal energy storage (TES) systems
- High-temperature chemical process heat transfer
- Industrial waste heat recovery and advanced energy projects
7. Conclusion
The Gansu Jiuquan Yumen 300MW compressed air energy storage power station demonstrates that in next-generation energy systems, molten salt pumps are no longer auxiliary equipment—they are core components that determine system efficiency, safety, and long-term reliability.
With proven performance at 565°C, tower-type molten salt industrial pumps engineered by SDP Pump provide a robust solution for large-scale energy storage, CSP, and high-temperature industrial applications.
As global investment in renewable energy and storage continues to grow, selecting the right high-temperature pump technology is a critical step toward ensuring project success and sustainable operation.
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