Performance study of a rural distributed multi-supply system based on SOFC/GT and multi-effect distillation
In order to improve the comprehensive utilization rate of energy,reduce carbon emissions,and alleviate the problem of brackish water in rural areas in China,a novel multi-generation system composed of a Solid Oxide Fuel Cell/Gas Turbine(SOFC/GT)hybrid power generation subsystem,a multi-effect distillation subsystem with Thermal Vapor Compression(MED-TVC),an absorption refrigeration subsystem and a heating subsystem is proposed.The system can simultaneously produce cooling,heating,electricity and fresh water.By establishing the mathematical model of the system,the thermodynamic performance of the system was studied,and the effects of key parameters such as pressure of SOFC,air flow rate and compression ratio of the thermal vapor compressor on the system performance were analyzed.The research results show that under the design conditions,the net power generation of the novel multi-generation system is 260.60 kW;the cooling capacity is 17.58 kW;domestic hot water heating capacity is 6.30 kW,and the CO2 emission reduction is 3.64 kg/h;the fresh water output is 541.10 kg/h;the net power generation efficiency of this system is 65.06％,and the comprehensive energy utilization rate is 71.02％.Increasing the SOFC pressure or reducing the air flow rate can increase the net power generation and CO2 emission reduction of the system.With the increase of SOFC pressure or air flow rate,the cooling capacity and comprehensive energy utilization rate of the system increase,but the fresh water output decreases.The water production ratio and fresh water output decrease with the increase of compression ratio of the thermal vapor compressor.
multi-generationsolid oxide fuel cells/gas turbinemulti-effect distillationbrackish water distillationrural energy system
万方数据
维普
