Experimental Study Of Water-saving Cooling Tower And Double-effect Plastic LiBr Absorption Chiller

The Lithium Bromide-water absorption chiller can driven by a variety of low temperature heat source, because of its low electricity consumption, no environmental pollution, no risk of explosion, wide range of cold adjustment, strong adaptability and other Advantages,was recognized the most promising refrigerator by the international community. Under the condition of prohibit to use freon, the lithium bromide absorption chiller has its greater future.the work medium of The Lithium Bromide-water absorption chiller is Lithium Bromide-water,which is a strong alkaline corrosive media, easily erode the lithium bromide chiller. Therefore, the corrosion problems greatly limited the development of lithium bromide chiller.This paper proposes double-effect plastic lithium bromide chiller,use plastic heat exchanger instead of metal heat exchanger intended to achieve using plastic instead of copper to solve the corrosion problems of lithium bromide refrigerator, meanwhile reducing the weight and the manufacturing cost of the lithium bromide chiller.This paper design a double-effect plastic lithium bromide chiller,its refrigerating capacity is 50 KW. We use plastic heat exchanger instead of the Low temperature solution heat exchanger in the chiller unit.The raw material of plastic heat exchanger is polypropylene contains graphites.Paper conduct the thermodynamic calculation and structure design of the double-effect plastic lithium bromide chiller, especially of plastic heat exchanger,and Optimization its structure.The result of calculation shows,the heat transfer coefficient of plastic heat exchanger is 229.16 W/(m2·k), Theoretical COP of double-effect plastic lithium bromide chiller is 1.27.After draw the whole drawing sheets, manufactured the chiller unit,We build a test bench of double-effect plastic lithium bromide chiller,then we carried out the gas tightness detection and debugging of the double-effect plastic lithium bromide chiller. The result of debugging shows, the chiller unit can work on the rails, The COP of unit in Initial debugging phase is 0.68.Wet cooling tower is widely used in many fields of national economy, such as electricity, petroleum, chemical, steel and so on,its water consumption is very huge. China is a serious water shortage country,the traditional wet cooling towers can not meet the requirement of long-term development of economy and society. Although dry cooling tower can saving the water, but the cost is too high,and the cooling effect is too poor in summer, therefore the development of water-saving wet cooling towers is imperative. This paper innovative presented a new water-saving cooling tower, salt-water cooling tower, It can be suppress water evaporation by adjusting the salt water concentration, thus achieve the object of saving water. The salt-water cooling tower provide a new way for develop related industry in water deficient area,it has great strategic significance to alleviate the China or even the worldwide growing water crisis. This paper carried out the thermodynamic calculation of Salt-water cooling towers,the cooling load is 371584.63 kJ/h,the air volume needed is 44775.85 kg/h. On the basis of theoretical calculation,paper designed the structure of Salt-water cooling towers.The Salt-water cooling towers use double tank structure,so it can adjust the concentration of solution to save more water.