Enhance system performance via pump optimization
In refrigeration and air conditioning applications, you can enhance system performance significantly by optimizing pumping operations. With multiple pump-dedicated control features and intelligent protection capability, Danfoss AC drives optimize production and protect the drive, the motor and the equipment in the system. They also ensure optimized liquid supply in the event of leakage or a broken pipe.
Continuous water or glycol supply can be assured in the event of leakage or a broken pipe. For example, overload is prevented by reducing drive speed and supply is secured at lower flow.
Leak protection
Dry Pump Protection and End of Curve features, which are integrated into Danfoss drives, relate to situations where the pump runs without creating the desired pressure – for example, when a pipe leaks. In this situation, the drive sets off an alarm, shuts off the pump, or performs another pre-programmed action.
You can gain significant energy savings and reduce installation costs thanks to flow compensation in both fan and pump systems. A pressure sensor mounted close to the fan or pump provides a reference enabling pressure to be kept constant at the discharge end of the system. The drive constantly adjusts the pressure reference to follow the system curve.
An operating pump will normally consume more power the faster it runs according to a curve determined by the pump and application design. The No/low flow feature detects situations where the pump is running fast but is not fully loaded. This could indicate that water circulation has stopped, the pump has run dry, or a pipe is leaking. Continuous liquid supply can be assured in the event of leakage or a broken pipe. For example, overload is prevented by reducing drive speed – and supply is secured at lower flow.
Achieve extra energy savings
Automatic Energy Optimization (AEO) provides additional energy savings of up to 5%. This feature matches the input current to the actual motor speed and load, and draws only the amount of power necessary for motor excitation and operation with this load. This avoids additional thermal losses in the motor.
With efficiency ratings up to 99% and a true power factor greater than 0.9, Danfoss AC drives are distinctly better than comparable devices. Losses for chokes and filters are already accounted for in the rating. This reduces not only direct energy costs for the drive itself, but also the costs for refrigeration or the removal of additional heat.
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Products
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A comprehensive solution for soft starting and stopping of three-phase asynchronous motors.
An extremely cost-effective and compact soft starter or soft start controller that provides basic soft start and stop functionality and easy DIN rail mounting.
Dedicated functionality that improves flow control and saves energy in industrial pump and fan applications.
FC 103 is dedicated to controlling compressors, pumps and fans for significant energy savings in refrigeration plants.
Case studies
SWEDEN: In the Swedish capital, Stockholm Exergi operates across five districts, supplying heat to more than 800,000 people and 400 hospitals through a 3,000-kilometre-long district heating network.
AUSTRALIA: In the semi-arid inland climate of the Riverina Region of New South Wales, where irrigation is essential to farming, the operator of Cadell Orchards faced a significant energy challenge. In its off-grid operation spanning 1,690 hectares, the Sunraysia almond orchard sustains more than 500,000 almond trees.
Brazilian water utility CAESB relies on DrivePro® services for planned maintenance and guaranteed response time to improve predictability in water management. Refurbished drives and upgraded units have extended the lifetime of their equipment, reduced the risk of downtime, and brought control to both operations and budgets.
USA: With integrated condition monitoring, VLT® HVAC Drive FC 102 optimizes hydronic system uptime to enhance indoor climate at a community healthcare facility in Wisconsin.
NETHERLANDS: B&P Electric Motors electrified its mobile high-pressure pump unit for horizontal drilling. VACON® NXP Liquid Cooled drives ensure high efficiency and resilience in harsh conditions, when forcing soil through pipes up to 3km long.
POLAND: At district heating company PEC Gliwice, AC drives reduce energy consumption of electric motors by up to 40%. DrivePro® Site Assessment audits help ensure optimal efficiency.