Energy efficiency with easy advanced control on screw and reciprocating compressors for poultry refrigeration

Panel: 4. Technology, products and systems

This is a peer-reviewed paper.

Authors:
Benedicte Ballot-Miguet, Electricity of France, France
Gregoire DUHOT, Electricity of France, France
Alain REYNAUD, LDC

Abstract

Refrigerating plants are usually controlled with PID controllers. If well set and with no variation in the cooling demand, these PID controllers are efficient. However, these two conditions are rarely combined. Even when equipped with speed variation or head pressure control, refrigerating plants may not be as efficient as they could. EDF Group has developed a new control, based on an internal model of the plant, which anticipates the adjustments of the plant, considering disturbing parameters.

This new control has first been experimented in our laboratory. An energy saving of 11% has been obtained with a reciprocating compressor and of 15% with a screw compressor.

This innovation has been tested on the refrigerating plant of LDC, a factory transforming poultry. The Easy Advanced Control has been installed on the 994kW cooling capacity screw compressors, the cold water pumps and the hot water pumps. The complete energy management allowed to measure an energy saving of 4%.