Energy Savings


In a growing desire to reduce our customers' energy consumption, we are constantly looking for smart, energy-saving solutions adapted to your needs. 
  • DANFOSS specialist
  • CAREL specialist
  • Consulting specialist for remodelling existing installations, energy optimisation by simple adjustments or the installation of a regulator
  • Preparation of CEE dossiers (energy savings certificates)


 Energy savings : industrial refrigeration

Industrial refrigeration represents a significant cost for businesses, but it also represents a potential for energy savings. To achieve this, it is necessary to apply best practices, to choose the right equipment and use it correctly.
The production of cold represents a significant cost for the agri-food sector, which can run as high as 50% of the electricity bill. Industrial refrigeration represents 4% of French electricity consumption and almost 7% of the national consumption of electricity. The agri-food sector alone consumes 57% of the electricity devoted to cold production.
In addition, refrigeration equipment has a double impact on the greenhouse effect: due not only to the energy consumption that it requires, but also to the fact that they operate with fluid refrigerants. These fluids (CFC, HCFC and HFC) have a global warming power that is 1300 times higher than CO2. In France they are responsible for 5.8% of greenhouse gas emissions.  
  

In order to reduce energy consumption, two avenues must be explored:
  • The facilities must be well sized by the refrigeration engineer, who must obtain the best performance. 
  • The user must ensure the sustainability of efficient operation over time.
The potential for energy savings in the field of industrial refrigeration represents an average gain of 20%. A diagnosis of the installation will reveal the potential for energy savings related to the use of refrigeration in an industrial environment and will then consider the actions to be taken according to their cost and profitability. A methodology of energy diagnosis for industrial refrigeration installations has been developed by ATEE.

How can we save energy on industrial refrigeration systems?  
 
  1. Apply best practices ​
  • Inform and educate the people who are likely to intervene and the users of refrigeration, and make them aware of the importance of their role and their actions on the control of energy consumption and the quality of products. 
  • Decrease the time of human presence in the area (a human being at rest generates a calorific power of 80 W).
  • Manage the opening of doors to avoid loss of cold.
  • Turn off the lights in the cold rooms when leaving.
  • Adjust the temperature of the coolant precisely.
  • Ensure the proper maintenance of the installation, clean and defrost the condensers regularly in order to avoid scale deposits and the fouling of heat exchangers that reduce the power of air coolers.
  • Adapt the condensation temperature according to the season.
  • Use free cooling (natural cooling).
  • Adapt the operating conditions which have a significant impact on energy consumption: e.g. offset major cold production until off-peak power rates apply.
     2.   Optimise the use of the equipment
  • Ensure the competence of the users: a refrigeration plant is a matter for specialists. The competence of the persons who operate the installations is an essential element for their sustainability.
  • Regularly check and repair, if necessary, the leakage of refrigerants that are a cause of the decline in performance of the installation. This is a regulatory requirement.
  • Check the sealing of cold room doors.
  • Ensure accurate monitoring of the main features of the installation: pressure of the refrigerant in the evaporator and condenser, electrical power of the compressor, flow and temperature of the water to be cooled, effective refrigerating capacity and consumption, exterior temperature and humidity in order to intervene quickly in case of problems. Establish alarm signals (limits not to be exceeded for certain settings) that trigger a check and an intervention.
  • Check the overheating of the refrigerant after the evaporator.
  • Monitor the operation of the compressors: performance deteriorates below a certain load. Optimise the control of the compressors by choosing which machines to engage depending on needs and by reducing the operating time for partial loads (cascade control). Turn them off when they are not necessary.
       3.    Choose your equipment well 

Do not try to save on the costs of regulation: the establishment of an optimised cascade control of compressors will, in the medium term, provide savings on operating costs. The competence of the refrigeration installer is a determining factor for the quality of the design of the system. It is therefore preferable to call on the services of an installer whose competence is officially recognized. 

The Qualiclimafroid label is granted to those installers who meet the following three criteria: 
  • Compliance with regulatory constraints related to health, safety and the environment.
  • Coverage by a civil liability and ten-year warranty insurance contract 
  • Hold prefectural authorisation to manipulate refrigerants.
These qualifications comply with NF-EN 45012 standards. During the design phase of the installation, or if a modification of the installation is planned, remember to:
  • Adapt the power of the compressors to their use - there is no need for excessive power.
  • Have correct condensation and evaporation temperatures in order to avoid wastage.
  • Choose suitable equipment so that the installation works at nominal conditions, and correctly size the piping diameters of the heat exchange surfaces.