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Estimation procedure of the efficiency of the heat network segment

机译：热网段效率的估算程序

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An extensive city heat network contains many segments, and each segment operates with different efficiency of heat energy transfer. This work proposes an original technical approach; it involves the evaluation of the energy efficiency function of the heat network segment and interpreting of two hyperbolic functions in the form of the transcendental equation. In point of fact, the problem of the efficiency change of the heat network depending on the ambient temperature was studied. Criteria dependences used for evaluation of the set segment efficiency of the heat network and finding of the parameters for the most optimal control of the heat supply process of the remote users were inferred with the help of the functional analysis methods. Generally, the efficiency function of the heat network segment is interpreted by the multidimensional surface, which allows illustrating it graphically. It was shown that the solution of the inverse problem is possible as well. Required consumption of the heating agent and its temperature may be found by the set segment efficient and ambient temperature; requirements to heat insulation and pipe diameters may be formulated as well. Calculation results were received in a strict analytical form, which allows investigating the found functional dependences for availability of the extremums (maximums) under the set external parameters. A conclusion was made that it is expedient to apply this calculation procedure in two practically important cases: for the already made (built) network, when the change of the heat agent consumption and temperatures in the pipe is only possible, and for the projecting (under construction) network, when introduction of changes into the material parameters of the network is possible. This procedure allows clarifying diameter and length of the pipes, types of insulation, etc. Length of the pipes may be considered as the independent parameter for calculations; optimization of this parameter is made in accordance with other, economical, criteria for the specific project.
机译：广泛的城市热网包含许多部分，每个部分以不同的热能传递效率运行。这项工作提出了一种原始的技术方法。它包括评估热网段的能效函数，并以先验方程的形式解释两个双曲线函数。实际上，研究了热网络效率随环境温度变化的问题。在功能分析方法的帮助下，推断出用于评估热网设定段效率和寻找参数以最佳控制远程用户供热过程的标准依赖性。通常，热网络段的效率函数由多维表面解释，这可以通过图形方式进行说明。结果表明，反问题的解决也是可能的。所需的加热剂消耗量及其温度可通过设定的段有效温度和环境温度来确定；也可以制定隔热要求和管道直径。以严格的分析形式接收了计算结果，这使得可以调查在设置的外部参数下发现的极值（最大值）可用性的功能依赖性。得出的结论是，在两种实际上很重要的情况下应用此计算程序很方便：对于已经建立的（内置）网络，当仅可能改变管道中的热媒消耗量和温度时，对于投影（在建中）网络时，可以将更改引入网络的材料参数中。该程序可以弄清管道的直径和长度，绝缘类型等。管道的长度可以视为计算的独立参数；该参数的优化是根据特定项目的其他经济标准进行的。

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