In modern conditions the system of complex automation of engineering systems of a grocery store, allowing realization of concept «Smart shop», is an additional opportunity to reduce operating costs, to gain a competitive advantage in the retail food market.
The programmable logic controller Danfoss MCX is used to control thermal screens, air conditioning, ventilation system, external and internal lighting.
The installation of fans with ES technology makes it possible to reduce energy consumption by more than three times. An effective solution is also to replace energy-intensive condenser fans with energy-efficient fans since it is in this heat exchanger that the heat extracted from the cooled product is recycled.
The payback period of ES ventilators on refrigerated furniture does not exceed 3 years.
A special electronic algorithm allows the electronic control system to monitor the reduction in performance of each evaporator and to make a decision on whether defrosting mode should be activated.
This function requires a pulsed ETCV and a monitoring system.
On average, the inclusion of this function gives about 1% of the energy consumption of the system and pays off instantly.
The use of ETCV makes it possible to maintain an accurate value of gas overheating in the evaporator under any variable conditions. In comparison, for example, with a mechanical thermal control valve (MTCV), the electronic valve ensures the continuous efficient operation of the evaporator by filling it with an exact refrigerant, making the entire heat exchange area fully operational. The payback of an ETCV solution compared to a mechanical TPV with the possibility of the switch being switched off at night does not exceed 3 years.
The essence of this technology is the ability to adjust compressor productivity as accurately as possible in relation to consumer needs. During the operation of the central refrigeration unit, the pressure on the compressors is constantly changing, since in the shop the mass of consumers working on their own volume.
The use of a smooth adjustment with the use of a frequency converter makes it possible to adjust the operation of compressors in relation to a change in load.
Furthermore, the use of a frequency transducer makes it possible to speed up the compressor engine over 50 Hz, which in turn increases the compressor performance at the same installed capacity.
At the moment, this technology saves energy and provides the specified capacity of the refrigeration unit.
The payback of the compressor frequency control solution is not more than 3 years.
The floating pressure function of the condensation allows the electronic control system to automatically adjust the operating parameters of the system to the ambient temperature: the lower the ambient temperature, the pressure on the compressors is smaller and the lower the energy consumption of the system.
In fact, the payback of such a solution occurs within one day, as the installation of an outdoor air sensor and the activation of a function in the controller are necessary for the basic function to be realized.
Installation of facade glazing on shelving windows (slides) is the easiest and most efficient way to reduce cold consumption and in turn energy consumption of equipment.
In the Russian retail market, there are two types of glazing installed on refrigeration equipment:
The shortage of electrical capacity and the lack of an affordable source of heat are the most common obstacles to making a positive decision to open a shop even in a geographically attractive location. This fact forces shopkeepers to pay attention to alternative ways of heating and obtaining hot water.
There are many options: recycling condensation heat, electric boilers, and using air or geothermal pump.