Theoretical And Experimental Study Of The Plastic Tube Of Lithium Bromide Absorption Chiller

Lithium bromide solution was the working medium of the lithium bromide absorption cooler. But its alkalescent nature would cause the corrosion of the heat exchanger and subsequently the loss of the cooling power, which in all had become the technical bottleneck of the development of the traditional lithium bromide absorption cooler.Based on detailedly analyzing the application and development of plastic heat exchangers at home and abroad, one approach was advanced that by substituting plastic heat exchanger made of thin wall and canaliculus PTFE plastic tube for the metal heat exchanger of traditional lithium bromide absorption cooler. The results of theoretical analysis and comparison showed that this approach would not only overcome the corrosion problems but also reduce its weight and cost without any increase in its bulk.In this paper, design and calculation on the PTFE plastic tube lithium bromide absorption cooler were done. Considering the working requirement and the character of plastic tubes, Archimedes spire shape was applied as the structure of the heat transfer tube and then parts process drawings were protracted. In the end, the design of plastic tube lithium bromide absorption cooler and build-up of corresponding experimental system were completed.In conclusion, it was feasible to use plastic tube as the heat transfer area of lithium bromide absorption cooler, and great change caused by the successful development of this sort of absorption cooler on the future development and application of the lithium bromide absorption refrigeration would promise.