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Case Study - EnerEfficiency

Energy Efficiency for Refrigeration Systems

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Description of the EES

This EES includes the installation of a mimicking device in refrigerator/freezers. The installation is quick and can be carried out during operation of the refrigerators. The existing sensor of the refrigerator/freezer is inserted into the eCube box. This device allows the sensor to read real food temperature rather than the fluctuating air temperature inside the systems. In this way the frequency of refrigeration cycles in reduced, while keeping the food temperature as needed. Thus, the lifecycle of the refrigeration system is incresed while energy consumptionis reduced.

EnerEfficiency staff is responsible for the monitoring of the refrigeration system. Usually, EnerEfficiency installs energy power meters in the switch board of the refrigeration system one week before the installation of the eCube. In this way ex-ante energy consumption is monitored. The power meters remain there for another week, after the installation of the eCubes. In some case, the monitoring period is extended in order to avoid the interference with batch cycle processes.

Online monitoring is also possible. No additional equipment is necessary. The savings achieved are usually high but there is an unpredictable factor related to the maintenance status of the refrigeration network that can have a negative influence in the savings achived. For example, refrigeration gas leaks, which were not perceptible before the eCube was installed, affects the results. In addition, during the monitoring period, the customer should not connect additional loads in the same circuit where the eCubes have been installed.

The costumer receives a report of the measurement campaign and is requested to register and send their temperature data, which is also analysed by EnerEfficiency in order to check if there are any temperature outside the food temperature regulations range. In larger facilities, an online monitoring equipment is installed in order to have instant access to the energy consumption data.

The eCube is certified by NSF at International level and it is also certified by Portuguese ISQ. This product has been promoted in a DSM campaign, which was a driver for the success of the implementation of the service.

Please download your brochure for more information:

 

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