About the optimization in calculations of internal cold and hot water supply systems

Regulatory literature, namely the DBN "Domestic Water Supply and Sewerage" does not offer an algorithm for obtaining the optimal diameters on all, without exception, the calculated sections of internal networks of cold and hot water supply. In general, it is not proposed to consider the entire network as a single object. It indicates only the maximum velocities of water in the calculated sections, which depend on the material of the pipe, and states that it is necessary "to maximally use the guaranteed head in the city network. These are two mutually exclusive recommendations. When one is implemented, it is impossible to implement the other and vice versa. It is proposed to completely formalize the calculations of internal networks from finding diameters on individual design sections of the internal network of cold or hot water supply. Optimization is performed simultaneously for all sections of the network without exception. For calculations, to find the best network variant, it is suggested to use two parameters: quantity and quality. As it is generally known, only simultaneous fulfillment of these two parameters enables the water supply network to be reliable. The quality of water depends on the time in which it reaches the consumer. The longer the time, the worse the quality of water. This applies to both cold and hot water. The quantity of water depends on the pressure. The greater the head, the higher the speed of movement and accordingly the higher the flow of water, but there is a disadvantage - the higher the head loss on the way to the consumer and the higher the fee for the service. The search for optimality, so that it was both fast and the head loss is minimal and gives the best option for the network. When using the methodology, neither the designer's experience in solving such problems, nor his general professional level has any influence on the result. This, in turn, makes it possible to quickly solve problems of finding the best option in a short time, as well as to further reduce the time when calculating the network to make the software and in this case the professional level of the designer in general will not have any bearing on the quality of calculations.