Work

Experimental investigation on performance of heat pump air circulation evaporating separation system for saline wastewater treatment

Year: 2024

Type: article

Abstract: There is a gradual increase in the discharge of saline wastewater which is harmful to the environment and human health. A novel heat pump air circulation evaporating separation (HP-ACES) system for saline wastewater treatment is proposed and experimentally investigated. The results show that the system evaporation efficiency ( SEE ) initially decreases before increasing with the expansion valve opening at different refrigerant charges. However, the SER increases by 0.67 kg/h at 1.21 kg refrigerant charge while they descend and then rise at 1.53 and 1.86 kg refrigerant charges. Noted that the effects of expansion valve opening on the SER and SEE are lessened with refrigerant charge. Moreover, there exist the optimal values of total air flow and air flow proportion of packing concentration tower at which the SER and SEE peak, and both of the solution concentration and cooling water flow negatively affect the SER and SEE . Besides, compared with similar evaporating separation systems, the HP-ACES system has higher energy efficiency for treating high saline wastewater and the SEE ranges from 0.86 to 1.64 kg/kWh (5–25 % CaCl 2 solution). However, the SEE is low, and it is necessary to reveal the cause and propose the optimization schemes in the future.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2024.104984

Authors: Liang Chen, Jing Yu, Yujiang Xia, Shucong Zhen, Sumin Jin

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

Language: English

Topic: Refrigeration and Air Conditioning Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Clean water and sanitation, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,210