## 3 Results
### Parametric Analysis  
To show the effect of operation parameters of the OAR on the system performance, we varied the \(AT_{sahx}\) from 8 to 32 \({}^{\circ}\)C, \(ST_{com2}\) and \(ST_{com3}\) from 14.01 to 40 \({}^{\circ}\)C and 23.66 to 40 \({}^{\circ}\)C, respectively, feed air temperature from 5 to 30 \({}^{\circ}\)C, and feed air humidity from 0 to 0.01 kg/kg. The corresponding \(ESR\) and \(COP\) at different \(T_{eva}\) and \(FR_{s\cdot a}\) (Figure 8a-d) was then calculated. Figure 7: Cooling load allocation of SAHEXs and CWAHEXs. (1) Internal operating parameters  
As shown in Figure 8a, \(ESR\) decreases as \(AT_{sahx}\) increases because either \(ST_{com2}\) or \(ST_{com3}\) has to be increased as \(AT_{sahx}\) increases. However, \(ESR\) only changes slightly with \(ST_{com2}\) due to the inverse relation between \(ST_{com2}\) and \(ST_{com3}\). In other words, under a given working condition, \(AT_{sahx}\) almost plays a decisive role in the energy saving ratio. This is caused by the fact that \(COP\) does not change with \(AT_{sahx}\), as shown in Figure 8c, which means the evaporation heat and generation heat ratio remains unchanged. However, energy allocation between SAHEXs and CWAHEXs changes with \(AT_{sahx}\). Thus, the gross heat of the SAHEXs and CWAHEXs has to be adjusted to maintain the energy allocation ratio to satisfy the evaporation heat and generation heat ratio; this is why \(ESR\) changes proportionally with \(AT_{sahex}\). The change in the gross heat of the SAHEXs and CWAHEXs is implemented by the change in \(ST_{com2}\) and \(ST_{com3}\); considering the slight incline of the \(ESR\) line with the decrease in \(ST_{com2}\) (as shown in Figure 8a,b), \(ST_{com3}\) can be preferentially enhanced with the change in \(AT_{sahex}\). Comparing Figure 8a,b, the maximum \(ESR\) is the same for the different evaporation temperatures of the OAR system. However, \(ESR_{max}\) can only be reached at a designated \(AT_{sahex}\). This further demonstrates that \(ESR\) is mainly affected by \(AT_{sahex}\) under a given humidity ratio of feed air and compression condition. As shown in Figure 8e, minimum and maximum \(AT_{sahex}\) increases proportionally with the increase in evaporation temperature. It can be concluded that a higher evaporation temperature permits a higher \(AT_{sahex}\), which allows a smaller heat exchange area. From another perspective, for a given \(AT_{sahex}\), \(ESR_{max}\) increases with evaporation temperature. It can be noted from Figure 8c,d that \(COP\) remains almost unchanged with \(AT_{sahex}\) and \(ST_{coms}\), while it increases with the increase in \(T_{craw}\). \(COP\) increases from 0.692 to 0.751 as \(T_{craw}\) increases from 12 to 14 \({}^{\circ}\)C.  
To understand the effect of the solution flow ratio of the generator, we varied \(FR_{s\
eq d}\) from 1 to 2.6. The maximum \(ESR\) predicted was 4.52%, as shown in Figure 9a,b, which further indicates that \(AT_{sahex}\) plays an almost exclusive role in the energy saving ratio at the given compression condition. As shown in Figure 9e, minimum and maximum \(AT_{sahex}\), corresponding to the minimum \(ESR\) (0%) and maximum \(ESR\) (4.52%), firstly increase with the increase in solution flow ratio, whereafter, the increasing tendency gradually slows down as the flow ratio reaches above 2. The slowing down tendency is due to a limited generation efficiency, which reaches 94-97% when \(FR_{s\
eq d}\) increases from 2.45 to 2.6. To achieve the maximum \(ESR\), the allowable \(AT_{sahex}\) increases from 20.7-28.5 \({}^{\circ}\)C as \(FR_{s\
eq d}\) increases from 1 to 2.6. It can also be observed from Figure 9c,d that \(COP\) remains almost unchanged with the \(AT_{sahex}\) and \(ST_{coms}\), while it decreases from 0.71 to 0.55 as \(FR_{s\
eq d}\) reduces from 3 to 1.5. This is explained by the fact that the generation efficiency drops as \(FR_{s\
eq d}\) reduces, which requires more fresh air for the regeneration of solution, leading to a larger air heating loss and consequent a lower \(COP\).