Showing papers by "Baomin Dai published in 2019"
TL;DR: In this paper, an environmental and economical assessment model is developed, in order to evaluate the performances of transcritical CO2 heat pump system with dedicated mechanical subcooling (CO2 HPDMS).
105 citations
TL;DR: Using air source heat pump system for residential heating is a practical way to replace coal-fired boiler in China to alleviate the haze problem, and CO2 is a promising candidate to replace hydroch...
78 citations
TL;DR: In this paper, a transcritical CO 2 heat pump (HP) system for residential space heating integrated with direct dedicated mechanical subcooling (DMS) is proposed, and mathematical models are developed to study the...
75 citations
TL;DR: In this article, the authors explore the technical alternatives of refrigerant substitution and analyze the application of low GWP refrigerant in three-stage cascade refrigeration system (TCRS), the change of operation parameters with the evaporation temperature has been studied by thermodynamic analysis.
Abstract: To explore the technical alternatives of refrigerant substitution and analyze the application of low GWP refrigerant in three-stage cascade refrigeration system (TCRS), the change of operation parameters with the evaporation temperature has been studied by thermodynamic analysis. The results show that R1150 can replace R14 in low-temperature cycle. R41 and R170 can replace R23 in medium-temperature cycle and R170 will be recommended as a priority. In high-temperature cycle, the refrigerants of R717, R152a and R161 are recommended. Taking into account environmental protection, the natural refrigerant of R717 is a good choice in the large refrigeration system. In particular, the refrigerant groups of R1150/R41/R717, R1150/R41/R152a, R1150/R41/R161, R1150/R170/R717, R1150/R170/R152a and R1150/R170/R161 are recognized. The results provide a basic theoretical analysis of the selection and replacement of refrigerant in TCRS.
48 citations
TL;DR: In this article, a comprehensive advanced evaluation model is developed to study the energetic, advanced exergy and economic performance of ORC system by using twelve HCs, considering the heat recovery from geothermal, low-temperature solar, engine waste gas heat, and high temperature solar applications.
42 citations
TL;DR: In this article, the thermal performance of a two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit was evaluated under the optimal sub-cooling temperature and compressor discharge pressure.
36 citations
TL;DR: In this paper, the authors evaluated the cooling and heating performance as well as the compressor operating conditions of CO2/R32 blends in a water-to-water heat pump system.
31 citations
TL;DR: In this article, an experimental setup is developed to study the thermal performance of the transcritical CO2 air source heat pump system used for space heating, and the test results show that a maximum coefficient of performance (COP) of 2.88 is obtained at the optimum discharge pressure and the ambient temperature of 10 °C.
10 citations