Study On Thermodynamic System Of Multi-stage Mechanical Vapor Compression By Non Grid Connected Wind Power

Multi-stage mechanical vapor compression by non grid connected wind power is a kind of non grid technology desalination system for the fresh water from seawater. This system not only solves the grid connected wind energy loss, but also to avoid the problems of grid connected wind power. The relatively low evaporation temperature of mechanical vapor compression reduces the fouling and corrosion problems, make full use of the latent heat of condensation and heat energy.I designed a single-stage and multi-stage mechanical vapor compression system model and give each part parameters of the single-stage and multi-stage mechanical vapor compression on the evaporation temperature of 90.31℃, fresh seawater concentration of 35000 mg/L, the compressor pressure ratio of 1.3. It analyzes the influence of system performance index on system series, the concentration of seawater, the evaporation temperature, the compressor pressure ratio and the compressor isentropic efficiency what provids a basis for selection of system parameters.There are analysis of exergy efficiency and exergy loss rate of the single-stage and multi-stage mechanical vapor compression on the evaporation temperature of 90.31℃, fresh seawater concentration of 35000 mg/L, the compressor pressure ratio of 1.3 in this paper. It analyzes the influence of the exergy efficiency and the exergy loss rate on system series, the concentration of seawater, the evaporation temperature, the compressor pressure ratio and the compressor isentropic efficiency what provids a basis for selection of system parameters.The above results provide theoretical basis for system optimization.