CO2: MIMET implements eco-friendly technology in the equipment that also helps to reduce electricity costs. It is important for the company to provide not only high quality equipment but also an excellent customer service.
It is an environmentally friendly coolant with a proven record in this regard meaning a global warming potential equal to one (GWP=1). The refrigerant Ozone Depletion Potential is almost non-existent (ODP=0). Among other positive things, CO2 is nonflammable, non-toxic, and non-hazardous. Its low temperature thermodynamics characteristics facilitate the volume reduction of the refrigerating circuit and save energy. In a refrigeration plant working with an air-cooled condensing unit, the refrigeration cycle operates above the critical point i.e., the transcritical cycle. The CO2 transcritical cycle is 4 to 5 times higher than the transcritical cycle in R22 and R404A. If it is applied in low temperatures, it is used as a refrigerant that is utilised in a cascade cooling system. In this way, the cycle works below the critical point i.e., the subcritical cycle. The CO2 subcritical cycle is 6 to 8 times higher than the subcritical cycle in R22, R404A and NH3. It is a low-cost installation because of the small diameters that have to be used. Its thermophysical properties such as low viscosity, high thermal conductivity, and high vapour density.
We work with refrigerants R290 y CO2-744. They are environmentally friendly meaning positive GWP and ODP levels.
Refrigerants, environmental characteristics, greenhouse gas: It is a gas in the planet’s atmosphere that absorbs and re-emits heat, warming the surface of the earth.
Refrigerantes, características ambientales
Gas efecto invernadero: Gas que atrapa el calor en la atmósfera de la Tierra, contribuyendo así al calentamiento global del planeta.
GWP: Global Warming Potential. It is an index that defines global warming over time. It compares the emission of 1kg of a greenhouse gas compared with CO2 over 100 year period.
ODP: Ozone Depletion Potential. Ozone Depletion Potential. It measures the relative amount of degradation a chemical compound can cause to the ozone layer. It is based on its duration period in the atmosphere, stability, reactivity, and chemical composition. ODP reference level is 1 for CFC-11.
Comparisons: Refrigerants R-290 y R-134a
The cooling effect of R-290 is considerably higher than R- 134a. It has a smaller compression ratio and a slightly superior volume. As a result, it delivers a minor phasic flow to generate the same cooling capacity. In contrast, its capacity to extract a higher amount of heat per kilogram of refrigerant is severely compromised regarding compression. It requires a greater amount of energy to increase refrigerant pressure from aspiration to discharge stages.
The main advantage of R-290 is the assurance of using a 100% eco-friendly refrigerant.