The exergy analysis and finite time thermodynamic methods had been employed to analyze the compound condensation process (CCP). It was based on the air-cooling heat pump unit. The cooling capacity of the chiller unit ...The exergy analysis and finite time thermodynamic methods had been employed to analyze the compound condensation process (CCP). It was based on the air-cooling heat pump unit. The cooling capacity of the chiller unit is about 1 kW, and the work refrigerant is R22/R407C/R410A/CO2. The MATLAB/SIMULINK software was employed to build the simulation model. The thermodynamic simulation model is significant for the optimization of parameters of the unit, such as condensation and evaporation temperature and mass flow of the sanitary hot water and size of hot water storage tank. The COP of the CCP of R410A system is about 3% - 5% higher than the CCP of the R22 system, while CCP of the R407C system is a little lower than the CCP of R22 system. And the CCP of CO2 trans-critical system has advantage in the hot supply mode. The simulation method provided a theoretical reference for developing the production of CCP with substitute refrigerant R407C/R410A/CO2.展开更多
The reaction of Mo(CO)6 with m-CH_3-C6H4SNa and Et4NCl(H_2O in CH_3CN afforded a dinuclear molybdenum(0) compound [Et4N]2[Mo2(CO)8(SC6H4-CH_3-m)2] (1). The crystal structure was determined by X-ray crystallography. Th...The reaction of Mo(CO)6 with m-CH_3-C6H4SNa and Et4NCl(H_2O in CH_3CN afforded a dinuclear molybdenum(0) compound [Et4N]2[Mo2(CO)8(SC6H4-CH_3-m)2] (1). The crystal structure was determined by X-ray crystallography. The crystallographic data: C38H54Mo2N2O8S2, Mr = 922.87, triclinic, P_ 1, a =10.336(2), b=10.753(2), c=11.121(2) ?, ( =88.88(2), ( =68.64(1), ( =69.71(1)(, V=1071.5(1) ?3, Z=1, Dc=1.43 g/cm3, F(000) = 476, ( = 7.1cm－1, Final R = 0.036 and Rw = 0.045 for 3423 reflections with I >3.0( (I). The X-ray structure analysis revealed that the Mo2S2 core is planar. The geometry around each Mo atom is a distorted octahedron, both of which form an edge-sharing bioctahedron. The Mo...Mo distance is 4.0665(1)(, which obviously indicates the absence of Mo-Mo bond.展开更多
文摘The exergy analysis and finite time thermodynamic methods had been employed to analyze the compound condensation process (CCP). It was based on the air-cooling heat pump unit. The cooling capacity of the chiller unit is about 1 kW, and the work refrigerant is R22/R407C/R410A/CO2. The MATLAB/SIMULINK software was employed to build the simulation model. The thermodynamic simulation model is significant for the optimization of parameters of the unit, such as condensation and evaporation temperature and mass flow of the sanitary hot water and size of hot water storage tank. The COP of the CCP of R410A system is about 3% - 5% higher than the CCP of the R22 system, while CCP of the R407C system is a little lower than the CCP of R22 system. And the CCP of CO2 trans-critical system has advantage in the hot supply mode. The simulation method provided a theoretical reference for developing the production of CCP with substitute refrigerant R407C/R410A/CO2.
文摘The reaction of Mo(CO)6 with m-CH_3-C6H4SNa and Et4NCl(H_2O in CH_3CN afforded a dinuclear molybdenum(0) compound [Et4N]2[Mo2(CO)8(SC6H4-CH_3-m)2] (1). The crystal structure was determined by X-ray crystallography. The crystallographic data: C38H54Mo2N2O8S2, Mr = 922.87, triclinic, P_ 1, a =10.336(2), b=10.753(2), c=11.121(2) ?, ( =88.88(2), ( =68.64(1), ( =69.71(1)(, V=1071.5(1) ?3, Z=1, Dc=1.43 g/cm3, F(000) = 476, ( = 7.1cm－1, Final R = 0.036 and Rw = 0.045 for 3423 reflections with I >3.0( (I). The X-ray structure analysis revealed that the Mo2S2 core is planar. The geometry around each Mo atom is a distorted octahedron, both of which form an edge-sharing bioctahedron. The Mo...Mo distance is 4.0665(1)(, which obviously indicates the absence of Mo-Mo bond.
