Refrigeration TechnologyRefrigeration Technology0023-124X2782-4241Eco-Vector10064210.17816/RF100642UnknownPromising technologies of the 21st century: liquid nitrogen as an environmentally friendly refrigerantKirillovN. G.info@eco-vector.comKA them. A.F. MozhaiskyLLC "IITs" Stirling Technologies "1501200493116191302202213022022Copyright © 2022, Kirillov N.G.2022<p>A possibility of use of low-temperature Stirling machines (KGM) for development of nitrogen cooling closed systems which are the alternative to straight-flow nitrogen systems is considered. The advantages of closed systems based on KGM Stirling are their independence, long operation time, low weight and dimensions. These systems can be used for thermostatting of the objects, for elimination of losses during storage of oil products and cryogenic liquids, in construction for production of high- quality concrete.</p>environmental requirementsrefrigeration equipmenta liquid nitrogenэкологические требованияхолодильная техникажидкий азот