Feasibility of drying system using waste heat as the heating source

2016 International Conference on New Energy and Future Energy System

Xie, M.N.^1 ; Shi, Y.L.^1 ; Chen, L.X.^1

Quanzhou Institute of Equipment Manufacturing, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, China^1

关键词: Alternative refrigerant;    Energetic analysis;    Global warming potential;    High heating efficiency;    Mechanical energies;    Ozone depletion potential;    Thermal Performance;    Thermodynamic model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/40/1/012031/pdf
DOI  :  10.1088/1755-1315/40/1/012031

来源: IOP

【 摘 要 】

In this study, a wastewater heat pump system was proposed and its thermal performance was analyzed. The proposed system includes two evaporators: an air-source evaporator and a water-source evaporator. The air-source evaporator absorbs heat from the moist hot air which exhaust from the drying oven. The water-source evaporator absorbs heat from the waste water, while the waste water recovers heat from the mechanical energy, which was produced by cutting and polishing in stone production. The thermodynamic model was developed to evaluate the performance of the proposed system. The energetic analysis was carried out to investigate the influences of the temperature of fresh air. The results show significantly higher energy efficiency, compact-sized and energy-saving compared with the system which uses air as the heat source. Among the seven of alternative refrigerants (R152a, R123, R1234yf, R1234ze, R600a, R22 and R600) investigated, R123 was suggested to be used in this heat pump for its high heating efficiency, inflammable, very low ODP(Ozone Depletion Potential) and GWP(Global warming potential).