Abstract
The scope of operations of the branch where the survey was carried out is: transmission and distribution of heat and heating medium to consumers through heat supply networks, maintaining the proper quality and amount of thermal power and heating medium supplied, ensuring contractual activities with heat consumers, as well as control of compliance with the consumption regimes stipulated by contracts, ensuring payments from consumers for supplied heat and heating medium, development and implementation of measures ensuring maximum efficiency of heat supply activities. The purpose of the work performed is to determine the actual heat losses through the thermal insulation of the surveyed heating networks and to compare them with normative values. The article presents an analysis of materials on the heat supply system; test findings for actual heat losses in a heat supply pipeline; calculation of actual heat losses for each section and their adjustment to average annual operating conditions of the given heat supply network; comparison of calculation results with normative characteristics. The test findings are used in developing the output performance for the «Heat Loss» indicator and in setting of norms for operating heat losses. The heat supply source for the heat pipeline is the CHP-plant. The pipelines are routed above ground on high and low supports, as well as in crawl ways. The thermal insulation of the pipelines is mainly made of 50 mm blankets of mineral wool and is typical for heat supply networks. In overhauls of heat supply networks, polyurethane foam is partly used as thermal insulation.
Highlights
The actual operating heat losses are determined experimentally through carrying out thermal tests on the heat supply network
The tests were performed for the network sections with the routing type and the insulation design is the characteristic of the given network, which facilitates expansion of the test results to the heating network as a whole [5-9]
Levelizing of the heat losses at the heating network pipeline section and cylindrical tanks based on the thermal conductivity laws is presented in papers [14-18]
Summary
The actual operating heat losses are determined experimentally through carrying out thermal tests on the heat supply network. The target of the tests is to determine the heat losses for various types of routing and design of the pipeline insulation that are specific to the heat network in question. Based on the test results, the insulation condition of the tested pipelines under the specific routing operating conditions is assessed [1-4]. The tests were performed for the network sections with the routing type and the insulation design is the characteristic of the given network, which facilitates expansion of the test results to the heating network as a whole [5-9]. Determination of heat losses in heat supply networks through thermal insulation is an important practical task. Levelizing of the heat losses at the heating network pipeline section and cylindrical tanks based on the thermal conductivity laws is presented in papers [14-18]
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