热泵负压再生系统中不同溶液的再生特性OA

In order to expand the application of heat pump devices in low-grade heat sources in the field of boiler flue gas waste heat recovery and improve the performance coefficient,based on the principle that the boiling point of work-ing fluids decreases with the decrease of regeneration pressure,using negative pressure regeneration technology,a pi-lot plant was designed and built,and the effects of regeneration temperature,solution flow rate,condensate equip-ment level and flash steam flow rate of two new heat pump working fluids in the negative pressure regeneration system were studied.The results show that the system pressure of potassium formate solution and calcium chloride solution is the same when the frequency of vacuum pump is changed.Under the same negative pressure,calcium chloride solu-tion is easier to regenerate than potassium formate solution,and the regeneration temperature difference is 2～5℃.The system stability of potassium formate solution is better than that of calcium chloride solution by observing the fluc-tuation of solution flow in regeneration equipment.When potassium formate solution is used as the working fluid,the flash steam flow rate changes approximately parabolically with the regeneration pressure,and linearly with calcium chloride solution.