Experimental investigation on the effect of TiO2 nanoparticles on the performance of NH3 – H2O - LiBr absorption refrigeration system
Experimental investigation on the effect of TiO2 nanoparticles on the performance of NH3 – H2O - LiBr absorption refrigeration system
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DOI：
10.1016/j.ijrefrig.2021.08.009
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发表时间：
2021-08
影响因子：
3.9
通讯作者：
Jin Zhenghao;Shuhong Li;Runfa Zhou;Menkai Xu;Weixue Jiang;K. Du
中科院分区：
文献类型：
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作者：
Jin Zhenghao;Shuhong Li;Runfa Zhou;Menkai Xu;Weixue Jiang;K. Du
The newly NH3– H2O – LiBr working fluid can decrease the power wasted in the generator, thus improves the COP of the ammonia absorption refrigeration system. But the applying of NH3– H2O – LiBr working fluid decreases the ammonia absorption efficiency, so the COP of the system is still unsatisfactory. To further enhance the COP of the NH3– H2O - LiBr absorption refrigeration system, TiO2nanoparticles are added to the NH3– H2O - LiBr working fluid in this study. And the effects of TiO2nanoparticles concentration on the performances of the generator, absorber, evaporator, condenser, and solution heat exchanger are tested in an ARS experimental system. The experimental results indicate that the addition of TiO2nanoparticles increases thePg, Pe, Pa, andPc, meaning that the value of ammonia produced in the generator increases. Therefore, the COP and iCOP of the system are improved by adding TiO2nanoparticles, and the COP is maximum improved by 18.96% compared with the ammonia-water absorption refrigeration system. When the xTiO2is increased from 0.3% to 0.5%, the increase rate of the COP decreases because the newly added nanoparticles do not disperse well. So 0.3% is a better choice for the TiO2nanoparticles concentration when comprehensively considering the dispersion stability of nanoparticles and the COP.
