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提出了一种用于单效太阳能吸收式制冷系统的新型双室涡旋发生器.通过降低发生器中的发生压力,有效利用太阳能等低温位热源来驱动吸收式制冷系统,提高单效吸收式制冷系统的制冷效率.双室涡旋发生器由低压发生室和高压发生室2部分组成.流体通过低压发生室的切向喷嘴进入到发生器中产生旋转运动,降低发生器中部的压力.实验研究了不同溶液入口温度和流量下双室涡旋发生器的性能.实验结果表明:发生器中部低压的形成,有效地降低了LiBr溶液的发生温度,有利于制冷剂的蒸发.当溶液入口温度达到90℃时,采用双室涡旋发生器的吸收式制冷系统其COP值达到0.83,比传统吸收式制冷系统提高22%.
A new double-chamber vortex generator for single-effect solar absorption refrigeration system is proposed, which can effectively utilize the low-temperature heat source such as solar energy to drive the absorption refrigeration system by reducing the pressure in the generator and improve the single-effect absorption Refrigeration efficiency of the refrigeration system.Double chamber vortex generator consists of low pressure generating chamber and high pressure generating chamber 2. Fluid flows through the tangential nozzle of the low pressure generating chamber into the generator to generate rotational motion and reduce the pressure in the middle of the generator. The performance of double chamber vortex generator at different inlet temperature and flow rate was studied.The experimental results show that the formation of low pressure in the middle of the generator effectively reduces the temperature of LiBr solution and facilitates the evaporation of the refrigerant.When the solution inlet temperature At 90 ° C, the absorption refrigeration system using a two-chamber vortex generator achieves a COP of 0.83, which is 22% more than the conventional absorption refrigeration system.