Optimization study of a closed-cycle low-temperature evaporation system based on mathematical model and CFD
Jun Liu1, Linchun Zhao2, Kaixuan Hu1
1School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China.
Environmental Research
|March 25, 2024
Summary
Optimizing the closed-cycle low-temperature evaporation (CCLE) system for high salt and high organic matter wastewater (HHW) treatment is crucial. Mathematical modeling shows key operational adjustments enhance efficiency for industrial applications.
Area of Science:
- Environmental Engineering
- Chemical Engineering
- Wastewater Treatment Technologies
Background:
- High salt and high organic matter wastewater (HHW) poses significant treatment challenges due to rapid industrialization.
- Existing treatment methods often struggle with the complexity and volume of HHW.
- Developing efficient and adaptable treatment systems is essential for sustainable industrial growth.
Purpose of the Study:
- To optimize a closed-cycle low-temperature evaporation (CCLE) system for industrial HHW treatment.
- To investigate the operating mechanisms of the CCLE system under various conditions using mathematical modeling.
- To identify key parameters for enhancing the system's wastewater treatment efficiency.
Main Methods:
- Mathematical modeling and computational fluid dynamics (CFD) were employed to analyze the CCLE system.
- Parametric analysis was conducted to evaluate the impact of different operating conditions.
- System performance was assessed based on heat pump efficiency and heat/mass transfer characteristics.
Main Results:
- Increasing compressor evaporation temperature and decreasing condensation temperature significantly improves heat pump performance.
- A smaller heat transfer coil windward area enhances heat and mass transfer within the humidifier.
- The study identified unique operational characteristics of the CCLE system for HHW treatment.
Conclusions:
- The CCLE system shows promise for treating HHW, with optimized parameters enhancing efficiency.
- Mathematical modeling provides valuable insights into system operation for industrial adaptation.
- Findings support the application of CCLE technology for challenging industrial wastewater streams.
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