Metal hydride air conditioning of the waste heat of automobile engine coolant driving
Aiming at developing metal hydride air-conditioning system driven by the waste heat of automobile engine coolant, the principle of metal hydride air-conditioning system was introduced and a hydride pair LaNi4.7Al0.3/LaNi5 was developed working at 363 K/303 K/283 K. the working cycle was described in detail. the values of characteristic parameters of the metal hydrides used in the system were also given.
Theoretic investigation of the solar refrigeration system based on metal hydrides
Based on the metal hydride heat pump's characteristics,a novel solar adsorption refrigeration system was presented.The models of energy conversion and exergy analysis were set up.The flow and working principles of system was introduced in detail.The exergy efficiency and the quantity about the exergy loss of the system were discussed based on an example.The results show that the system has a better energy-saving effect,and it is affected by the quantity of solar radiate energy mainly.The goal of the system's optimization is to increase the exergy efficiency of metal hydride heat pump,based on the quantity of solar radiate energy.The other orientation of the system's development is to use the system coupled with other solar energy technology.
Homogenization analysis of diffusion and adsorption macrotransport in porous media: macrotransport in the absence of advection
A model for pollutant transport in a heterogeneous medium, including diffusion accompanied by adsorption, has been developed. The macroscopic equivalent diffusion tensor and the macroscopic governing equations for the average concentration field can be deduced by homogenization. The necessary condition for this theory to be applied is the existence of a small parameter E defined as the ratio of the scale of the pores and the scale of a sample, which can be distinguished in the heterogeneous medium. Transport processes with respect to different dominating phenomena, related to E, have been examined. Using the analysis performed the condition has been specified when the homogenization is not possible, i.e. when it is impossible to find the rigorous macroscopic equivalent description. Un modele de transport de polluants, prenant en compte diffusion et adsorption, a ete developpe. Le tenseur de diffusion macroscopique equivalant ainsi que les equations d'etat macroscopiques du champ de concentration moyen peu...