Realization And Optimization Of A Novel Absorption Heat Pump At High Temperature For Heat Recovery Of Moist Hot Exhaust Gas

Humidified hot exhaust gas is a common form of waste heat in the industrial production, considerable amount of waste heat in petrochemical, paper, dyeing industrial production is discharged to the atmosphere with the moisture in the exhaust gas. Heat recovery and utilization of moist hot exhaust gas can reduce the heat loss of industrial production process and improve the energy efficiency. The latent heat recovery of the condensation method is limited by the dew point of the moist hot exhaust gas and the recycling energy grade is reduced which can hardly meet production needs. The recovery heat raised temperature range is limited of the traditional absorption heat pump, which has a lower coefficient of performance. For this, a novel absorption heat pump system has been proposed to recover the latent heat of the moist air with a high-temperature output. The following researches have been carried out:?1? A hybrid absorption-ejector heat pump at high temperature was presented in this paper in order to convert humidified hot exhaust gas into work steam and reuse it in industrial production processes. Mathematical model was established with Engineering Equation Solver on the basis of thermodynamic analysis and the performance is simulated and analyzed. Variations of the COP with inlet solution concentration, liquid-gas ratio, entrainment ratio were been investigated.?2? The process was innovated and material was optimized of the novel Absorption heat pump which was applied for latent heat recover of exhaust air in a chemical fiber factory in Ningbo City. The design of experimental prototype was completed by thermodynamic calculations for the system. Finally, the absorption solution was optimized for solving some problems in operating of conventional Li Br absorption heat pump system.?3? The vapor pressure data of CHO₂K/H₂O, Li Br/H2 O, C₂H₃O₂K/H₂O and aqueous triethylene glycol solution were determined by gas chromatography. In order to provide some reference data for the optimization of the working fluid and the open absorption heat pump engineering, the experimental data were fitted to an Antoine type of equation. There are 36 pictures, 13 tables and 51 references in this paper.