ENERGY SAVING EQUIPMENT
condenser, expansion valves, and electronically commutated (ECM) fans, to improve energy efficiency.
How does variable speed work?
Variable speed technology saves energy because it counts on an electronic device, named inverter, to control the compressor’s motor. Inverter and motor compose a system that can modulate the cooling capacity by adjusting the compressor’s working speed: reducing it during low demands (low ambient temperature or no door opening) and increasing it under high demands (pull down, reload or high ambient temperature). This enables the compressor to use only the amount of energy required at each moment and nothing more.
When you have a fixed speed (on-off)
compressor, it operates at a constant speed, continuously switching on and off to meet the refrigeration equipment’s cooling demand. This pattern requires abrupt power loads when starting and, for having only one speed, it always works at full capacity until it turns off, when the target temperature is achieved. It leads to wasted energy.
Putting it in numbers: a variable speed
compressor can work in a range from 1,600 up to 5,000 rpm (rotations per minute), whereas a fixed speed only runs at the power supply frequency (3,000rpm for 50Hz and 3,600 rpm for 60Hz).
The capacity modulation also delivers
lower noise and vibration and allows to keep food fresh for longer, by maintaining better temperature stability inside the cold rooms. It happens because this technology overcomes temperature variations much faster than the standard on-off compressors models, thus improving food preservation and potentially avoiding product loss. The variable speed compressor also enables yet an additional saving, in stock management. Because the inverter has a wide voltage input,
Quick gain for refurbishments Combining the migration to R290 and variable speed in one single move can be the answer to saving the maximum energy possible and, in the case of cold rooms, the use of a monoblock to do it is versatile, independent of the size of the cold room. This particular series used in the case study can refrigerate a room up to 24 cubic meters, and the units can be combined to up to five.
it allows the final product, in this case, the monoblock, to cover all the needs of a global market just with one single model.
We can’t also forget that cold rooms are impacted by other issues, not only energy consumption, such as: space restrictions, in the case of small and medium enterprises, and the necessity for a system that is of easy maintenance, fast installation and smooth operation. Monoblocks are compact systems and don’t depend on extensive external fittings, thus being fast and simple to install and of low maintenance. In the case of refurbishment of existing cold rooms, combining all these technologies is a way to reduce energy costs and environmental impact in a quick and simple manner.
Download the ACR News app today
www.acr-news.com • January 2023 21
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40
