New ADAP KOOL - Pack Controller 781: energy and costs saver by Danfoss

By Clémence Girard-Reydet, Jul 17, 2012, 09:56 2 minute reading

Danfoss presents the new AK-PC 781, a multifunctional pack controller for transcritical CO2 systems and other common refrigerants. For transcritical systems this pack controller, features CO2 gas pressure control, heat recovery and oil management. It allows wasted heat to be recovered for domestic hot water production and space heating.

According to Danfoss’ White Paper titled ‘Saving Money on heat recovery’, the new AK-PC 781 unit is primarily designed for CO2. After having tested the system in commercial refrigeration applications, in Denmark, they have proved it was possible to reclaim all the necessary heat in retail stores, and thus save all energy costs on heating.

AK-PC 781 advantages

The AK-PC 781 main advantages include:
  • Compatible with transcritical and cascade systems
  • Heat reclaim function for transcritical systems
  • Gas cooler control and medium pressure control is integrated into the pack controller
  • Easy installation and set up
  • Internal software that can be set for the most common refrigeration setups
  • The AK-PC 781 is able to inform additional controllers in the system about operating conditions (forced closing of expansion valves, alarm signals and alarm messages)

Real life measurements

Danfoss has been testing this new system in two different supermarkets stores of small (700 m2) and medium size (1000 m2), in Denmark. In both test locations, heat reclaim has reached approximately 40 kWh per degree-day to satisfy the demand for energy to heat the building.

For both test sites, the available energy was close to 1.3 times the consumed electrical power. Even when the ambient temperature was equal to -20°C, it was apparently possible to fulfil the heat demand without additional energy supply and not all heat was reclaimed.

In the supermarket whose surface was 1000 m2, the energy savings realised have been measured to be between 100€ and 130€ per day. According to the Danish expert, this could lead up to 25600€ saving a year and the simple payback time for the system was less than 5 months.

About Danfoss

Danfoss operates globally as a leading energy-efficient solutions supplier for cooling of food, air conditioning, control of electrical motors and heating in buildings – as well as solutions for renewable energy such as solar power. Its products help save energy and meet the challenge of climate change. Today the company employs 23,500 employees globally and has 110 sales companies around the world.

Contact information

If you would like to contact Danfoss for any enquiries, you may send a request to Anders Juul, CO2 Business Development Manager at Danfoss.


By Clémence Girard-Reydet

Jul 17, 2012, 09:56

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