Performance evaluation of a multi-stage humidification compression with heat recovery based on mathematical modeling

Multiobjective Modeling and Optimization of a Heat and Mass Transfer-Integrated Network in a Desalination System

“…The structure of a multistage compression desalination system with heat recovery proposed in the reference is shown in Figure . In Figure , seawater is not divided before entering the HEN.…”

“…Calculation of Stream Enthalpy. Calculation of seawater enthalpy at each temperature/concentration position 37 i k j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j j y { z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z Calculation of air enthalpy at each temperature/concentration position 18,37 i j j j j j j i k j j j j y…”

“…EL sys of structure C is 19.87% lower than that of structure B and 10.87% higher than that of structure A. TAC of structure C is 11.91% higher than that of structure B and 17.34% lower than that of structure A. The structure of a multistage compression desalination system with heat recovery proposed in the reference 18 is shown in Figure 10. In Figure 10, seawater is not divided before entering the HEN.…”

“…Seawater is predivided into three rich streams referred to the three-stage humidification compression desalination system in the literature 18 for comparing on the same basis, and nine alternative seawater prediversion schemes are listed in Table S3 based on the optimum operating conditions. Under the premise of the determined system operating conditions optimized in the first step, the decision variables involved in the system structure that still affect EL sys and TAC are as follows: In the humidification network, there are the existence of each humidification unit, the heat transfer and mass transfer quantity of each humidification unit, the stream temperature at each temperature location, and the seawater salinity and air humidity at each concentration location.…”

“…In the same year, a mathematical model of the HDH desalination system was developed and solved by Wu et al 17 based on experimental conditions. Ghalavand 18 proposed a multistage HDH desalination system based on humidification and compression and established a corresponding mathematical model to analyze the impact of operating conditions on system performance. The results show that when a single-stage system was upgraded to a multistage system, the performance was significantly improved.…”