提出一种可利用低品位的太阳能同时产生淡水和电能的太阳能海水淡化与发电装置,并证明理论产电量大于实际耗电量.给出其工作原理及其热力学过程,并结合卡诺循环计算出该装置的稳态热效率公式,最后通过实验证明该理论在实际中的可行性.实验表明该装置产生的淡水量基本和理论值相吻合,但实验所测电能和理论值相差较大,这主要由海水在碟形喷嘴内膨胀不充分、喷嘴在旋转过程中的阻力及摩擦磨损等因素所致.

A new system combining desalination and power generation with soalr energy is presented and the principle of the new system is introduced.The design process on two phase nozzle is showd based on the Isentropic Homogenous Equilibrium theory and two-phase theory,and a caculated method on theoretic fresh water rate and generated energy is obtained.Through theoretical analysis,the enthalpy drop of brine is transformed into electric and kinetic energy,which should be reduced ultimately to increase generated energy.According to the experiment it is found that the actual fresh water rate is a little higher than the theoretical value,meanwhile the actual generated energy is much lower.At last,a simple analysis is made on the difference between the theoretical generated energy and actual value,which it is found that the insufficient expansion of the brine in nozzle is the main reason to cause the lower generated energy of the system.

A new combined desalination and power generation system using solar pond was presented in this paper and the principle of the new system was introduced. A new disc convergent-divergent nozzle was desgined and used in the simple reaction turbine. According to theoretical analysis of the thermodynamics process, the power production and fresh water rate were obtained at tapical parameters. To prove the feasibility of the principle a small experimental rig was set. After simple experiment it is found that the actual fresh water rate is a little higher than the theoretical value, but the actual power is too much lower, which means that the hot brine couldn't expanded insufficiently in the nozzle and the flow passage of nozzle needs to be improved farther to increase the power production. Also the other influencing factors should be considered such as the condenser efficiency, drag losses,chamber pressure and etc.