## 3 Results and Discussion
By incorporating a portion of the cooled ICC flow into the full-flow circuit, at the input of FWP1, and mixing it with the flow leaving the engine, the temperature \(t_{mw1}\) is maintained in front of the engine. The key parameters of this cooling system and other schemes, at the minimum of \(M_{\Sigma}\), are presented in Table 6.  
As evident from Table 6, for the type B cooling system, the minimum value of \(M_{\Sigma}\) is significantly reduced compared to the previous version. In alignment with the \(I_{Xw}\) criterion value, the heat exchanger with the largest core mass in this system operates under conditions of a higher temperature difference than the previous scheme. The masses of the charge and oil cooler cores experienced slight increases, but a substantial reduction in \(M_{\Sigma}\) was achieved, as confirmed by the corresponding criterion. In principle, for any cooling system, an increase in the sum of the masses of the heat source cores is accompanied by a decrease in the sum of the masses of the heat sink cores and vice versa. The patterns of growth and reduction in the masses of heat exchanger cores depend on the adopted design of the cooling system. Comparing the first two cooling systems, the following observations can be made. In the cooling system type A circuit, hotter fuel oil is extracted from the full-flow circuit than in the cooling system type B, but this does not result in an increase in the temperature difference on the central cooler. At first glance, the indicated temperature difference should have increased, but this did not happen. The organization of the previous system imposes certain restrictions on reducing the costs of ICC through heat exchangers. Specifically, it is impossible to achieve the required ICC temperature in front of the engine if its flow through these heat exchangers is too low. This, in turn, limits the increase in temperature difference for the central cooler. As shown in Table 6, \(\eta_{c}\) exceeds the value corresponding to the minimum \(M_{\Sigma}\) for the simplest circuit. The value of \(S_{c}\) is very close, and the core mass is greater. This is attributed to the rationalization of other heat exchangers in the circuit. It should be noted that the values of \(S\) for the oil cooler and central cooler for the schemes under consideration significantly exceed the values that occur for circuits that do not take advantage of the effect of reducing ICC consumption. As per Table 6, \(M_{\Sigma}\) for the type B system decreased by almost 180 kg compared to the type A system. The primary reduction was achieved by reducing the mass of the central cooler core. Let us examine a type C cooling system scheme (Figure 8), in which a reduction in \(M_{\Sigma}\) is achieved by increasing the number of central coolers. This offers expanded possibilities for regulating the flow of ICC through heat exchangers (Table 6). Figure 7: Scheme of the cooling system type B. This and the subsequent systems utilize a hydraulic fluid cooler. The mass of its core is very small, approximately 39 kg. For this reason, the presence of this heat exchanger has no practical impact on the comparison results of the cooling systems. The values of \(\eta_{c}\), \(S_{e}\), and \(M_{c}\) here are close to the values established for the simplest circuit. The parameters of the remaining heat exchangers are determined based on the decrease in \(M_{\Sigma}\). The reduction in \(M_{\Sigma}\) for this system, compared to the previous one, is more than 100 kg. Compared to cooling system type A, it is about 280 kg. A further reduction in \(M_{\Sigma}\) can be achieved through even better possibilities for regulating ICC flow rates through the system heat exchangers. However, for the considered schemes and similar ones, these possibilities are practically exhausted. Increasing or even maintaining the temperature difference for the heaviest heat exchangers is challenging. This can be illustrated by the diagram of the type D cooling system (Figure 9). A central cooler No.