Work

A simulation-based optimization of heat pump air circulation evaporating separation system for saline wastewater treatment

Year: 2024

Type: article

Abstract: Recycling salt and water from saline wastewater is crucial for environmental preservation, resource conservation, and social economy sustainability. The heat pump air circulation evaporating separation (HP-ACES) system for saline wastewater treatment is proposed. Nevertheless, it is discovered that the system evaporation efficiency ( SEE ) is low and solid crystalline salt does not precipitate during the experiment. Therefore, an established and validated mathematical model of the HP-ACES system is provided and the average relative errors of the system evaporation rate ( SER ) and SEE are 5.3 % and 7 %, respectively. The theoretical analysis of the non-optimized system indicates that the main cause of the low SEE of the HP-ACES system during the test is incorrect cooling water flow. Hence, the system optimization scheme is presented and the comparison of the HP-ACES system's performances before and after optimization is conducted. Results demonstrate that the SEE of the optimized HP-ACES system has been greatly improved (optimized system: 0.62–2.46 kg/kWh, non-optimized system: 0.77–0.91 kg/kWh). Additionally, there is almost no change in the yield and composition of the solid crystalline salt when the inlet air temperature of spray separation tower is above 90 °C.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2024.105344

Authors: Liang Chen, Jing Yu, Yujiang Xia, Tingting Zhang, Sumin Jin

Institutions: Yancheng Institute of Technology, Jiangsu Vocational Institute of Commerce, Nanjing Tech University

Language: English

Topic: Solar-Powered Water Purification Methods

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Clean water and sanitation, Affordable and clean energy, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $1,210