{"id":50749,"date":"2022-02-22T13:03:47","date_gmt":"2022-02-22T12:03:47","guid":{"rendered":"https:\/\/www.intarcon.com\/?p=50749"},"modified":"2022-06-03T10:49:41","modified_gmt":"2022-06-03T08:49:41","slug":"transcritical-co2-compact-condensing-unit","status":"publish","type":"post","link":"https:\/\/www.intarcon.com\/en\/transcritical-co2-compact-condensing-unit\/","title":{"rendered":"Transcritical CO2 compact condensing units"},"content":{"rendered":"

For applications such as supermarkets, INTARCON offers compact transcritical CO2<\/sub> condensing units with built-in gas cooler.<\/p>\n

CO2<\/sub><\/a> has become one of the most popular natural refrigerants in recent years. It is classified at safety level as A1, “non-flammable” and “low toxicity”.\u00a0It has excellent thermo-physical properties, although it poses difficulties due to its low critical temperature value (30.978 \u00b0C) and high pressures. It has a much higher volumetric capacity than conventional refrigerants.<\/p>\n

CO2 <\/sub>transcritical cycle<\/h2>\n

Transcritical cycles are those in which the compressor discharge pressure is higher than the critical pressure and therefore the refrigerant is not condensable<\/strong>. It consists of using only CO2<\/sub> refrigerant in the equipment and cooling it above the critical point, without phase change during the cooling process. It is common for these systems to work with high compressor discharge temperatures, due to the need to reach high pressures (approximately 95 bar) in the “gas cooler” in order to exchange heat with the environment.<\/p>\n

Performance improvements<\/h3>\n

A transcritical system has the efficiency trade-off of having to compress the steam generated at the outlet of the Gas-Cooler<\/strong>, in addition to the large compression ratio to overcome. This is aggravated with a high outside temperature, as more steam is generated.<\/p>\n

In order to obtain working efficiencies similar to those of conventional fluids in transcritical systems, they are used:<\/p>\n