20.500.12556/DKUM-92815 Comparison of the new refrigerant R1336mzz(E) with R1234ze(E) as an alternative to R134a for use in heat pumps R134a is currently the most widely used refrigerant, whose problem is the high value of the global warming potential, and which will have to be replaced in the near future. Thus far, R1234ze(E) has proven to be the most suitable alternative, but it is slightly flammable. Recently, R1336mzz(E) has emerged as a possible alternative. During the research, the mentioned refrigerants were compared with simulations using the Aspen Plus software package in the case of using groundwater as a heat source. It was found that R1336mzz(E) could be a suitable alternative to R134a since the highest value of coefficient of performance was obtained using it. However, it must be superheated with an internal heat exchanger. The problem with using an internal heat exchanger is that the superheating of the refrigerant vapors affects the isentropic efficiency of the heat pump compressor negatively and, consequently, lowers the COP value of the heat pump. It has been shown that a one percent decrease in isentropic efficiency results in a one percent decrease in the COP value. heat pump internal heat exchanger HFO HFC alternative GWP globalno segrevanje toplotne črpalke primerjava true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/processes © 2022 by the authors Članek v reviji 2025-05-15 07:27:00 2025-05-15 07:27:00 2025-05-16 03:10:53 0000-00-00 00:00:00 2022 0 0 19 str. št. 2 let. 10 24 Jan. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2021-12-14 2022-01-21 2022-01-24 620.92/.98 94960899 10.3390/pr10020218 2227-9717 processes-10-00218-v2.pdf processes-10-00218-v2.pdf 1 46BD3660102961A6A602C925CE0CC9DB 01b671cd9fd46abf631d8dc04d4e61d3c29778aa55aa4349a2a9ac639a1cb275 7ada8c7b-314d-11f0-832c-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=191024 https://www.mdpi.com/2227-9717/10/2/218 1 3b681543-314d-11f0-832c-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=191023 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0