Romania: natural refrigerants user.

The article presents a study of the Romanian line up to the environment, refrigeration and air conditioning EU legislation with the recommendation of using R717 and R744 as ecological refrigerant alternatives in refrigeration systems. To implement the International Legislation, in the future it is necessary to retrofit HFC refrigerants with ecological refrigerants. The work has focused on the natural working fluid used in association with non natural working fluid with zero and low global warming potential (GWP). The comparative study of these facilities followed the coefficient of performance of a plant and also the TEWI factor (Total Equivalent Warming Impact – in respect with EN 378-1). Energy efficiency is directly related to global warming and greenhouse gases emissions.