Glycol pumps for cooling inverters in wind turbines
Lightweight – Durable – Powerful – LC
Wind turbines need a frequency inverter to adapt the resulting frequency to the grid frequency. The conversion process releases a large amount of heat during operation that needs to be dissipated. This is a major problem mainly in offshore installations due to poor accessibility and maintainability.
For this reason, offshore wind turbines often need durable components. A popular design of the cooling unit is the use of a refrigerant consisting of a water-glycol mixture in combination with a canned motor pump.
Main requirements of the refrigeration unit / for offshore wind turbines:
- Durable
- Space-saving
Our solution: LC pump – durable, lightweight, powerful
Due to the limited space available and the need for a durable, maintenance-free system for wind turbines, canned motor pumps are increasingly being used.
Key benefits of the canned motor pump LC series specially designed for cooling inverters:
| Durability | Mean Time Between Failures (MTBF) > 130,000 h |
| Design | Extremely compact |
| Price | Attractive prices and low life-cycle costs |
| Flexibility | Fast development to meet individual customer requirements |
| Safety | Hermetically sealed system without media loss |
| Mounting | Horizontal and vertical mounting as well as 90° versions |
| Weight Approx. | –20 % weight compared to conventional |
| Protection | Highest corrosion and fire protection |
LC pump – technical dat
| Delivery rate (50 Hz) | up to 19.2 m3/h (up to 320 l/min) |
| Pumping head (50 Hz) | up to 38 m |
| Motor output | 1.0 kW to 3.0 kW |
| Nominal pressure | 10 bar |
| Operating temperature | –40 °C to +80 °C |
| Weight | < 42 kg |
| Noise level (50 Hz / 60 Hz) | < 68 dB |
| Type of protection (motor) | IP 66 |
| Corrosion protection (paintwork) | up to C5 |
| Fire protection (paintwork) | R1 and R7 for HL1, HL2 and HL3 |