COMBINED WATER DESALINATION AND POWER GENERATION USING A SALINITY GRADIENT SOLAR POND AS A RENEWABLE ENERGY SOURCE
(0) Integrated desalination and electricity generation using solar energy is a prospective way to solve the twin challenges of energy and fresh water shortage, while helping save farm land degradation in salt-affected areas. As part of the design of a combined desalination and power supply system, this paper presents the performance analysis of a two-phase nozzle using a homogenous equilibrium model. It also presents the designing and testing of a prototype system using three different types of nozzle under static and rotary conditions. Initially the performance analysis of a spray nozzle is presented along estimation of both the fresh water production and power generation. The performance analysis of a convergent-divergent (C-D) nozzle is then presented. The experimental results for fresh water production are consistent with the theoretical calculation using the Homogenous Equilibrium Expansion Model (HEM). However, there is a large difference between experimental and theoretical values for power generation. Based on the experimental analysis, reasons for the low power generation are found and a new design for the reaction turbine is proposed using a curve length C-D nozzle to overcome the problems encountered with the previous prototype. The preliminary results show a 30％ improvement in the experimentally observed reaction force caused by the flow of water in the static test of the new nozzle design. After analyzing the efficiency of the cycle by T-S diagram and comparing with the experimental results obtained with reference to different pressures and temperatures, it is suggested that an evacuated tube solar collector connected in series with salinity gradient solar ponds can be used to boost the temperature of the salt water and to improve the efficiency of the system..
Yuchun Zhao Aliakbar Akbarzadeh John Andrews
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）