The invention relates to the field of construction and energy and is intended to reduce capital costs during construction, operation of a heat network, as well as reduce heat loss during transportation of heat energy. The objective of the invention is the optimization of heating networks and transportation of the coolant with minimal heat loss from the heat source to the consumer, as well as reducing construction and operating costs of heating networks. The technical result of the invention is to reduce the amount of heat loss in the pipelines of the heat network. Not considered separately for backbone and separately for distribution networks. This task and technical result is achieved by a method of reducing heat loss of a heat transfer pipe of a distribution heat network, in which the supply pipe and return pipe of the heat network are replaced with a pipe of a smaller diameter, increase the speed of the coolant and extinguish excess pressure with an automatic or throttle valve, while choosing the optimal pipe diameter calculate the allowable value of pressure losses in the pipeline of the distribution heat network according to the formula, where dH of the network is the available pressure on the mains at the connection point of the distribution heat network; node dH is the necessary sufficient available pressure at the consumer of the heating network. Calculate the calculated pressure loss by the formula, in meters, where dh is the hydraulic loss at the estimated flow rate of the heating fluid, kgf / m ∙ m; ke - the actual coefficient of roughness of the pipeline, mm; B - correction factor for local resistance of the pipeline; L is the total length of the pipeline heat network, m; 1000 is the conversion factor, mm in m, the residual throttling head is calculated for extinguishing on the pipeline unit according to the formula dP unit = dH network - dH unit - dP, m, and then the calculated losses are subtracted from the allowable pressure loss in the pipeline of the distribution heating network dH losses pressure dP in the supply and return pipelines, which should be no more than dH losses, m, to confirm the optimality of the selected diameter of the pipeline.
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