The definition of the heat losses from sections of main heat pipes, the method of Etalon
Keywords:
heat loss, measurement, standard, tubingAbstract
Currently, thousands of kilometers of heat pipes operated with worn insulation. A significant part of heat energy is lost to the environment. To measure the magnitude of heat losses on the pipeline very difficult, and the accuracy of measurements using the current methods depends on seasons, temperature and humidity, coolant temperature, state of heat insulation and other factors. The developed measurement technique and design of the measuring device allows to determine the level of heat loss in any pipe section regardless of the type of thermal insulation. The measuring device is a mounted on the tube housing with screens on the inner surfaces and openings top and bottom for sensors measuring temperature and air flow, which determines the heat loss into the environment. The device is pre-calibrated in the laboratory using standard heat capacity in which it is uniformly distributed over the surface, simulating the pipeline. The benchmark is a model of the pipeline section containing the heater and integral temperature sensor. The presence of screens and good insulation of the device allows you to convert all radiant heat energy in the convection. This allows to take into account all heat losses of the pipeline. Changing the diameter of the holes in the end caps of the device, it can be used to measure the heat losses from the pipelines of various diameter.
References
SNiP 2.04.14-88. Teplovaja izoljacija oborudovanija i truboprovodov [Thermal insulation of equipment and pipelines]. – M.: CITP Gosstroja SSSR [TSITP of USSR Gosstroi], 1989. – 28 s.
Bajbakov, S. A,. Timoshkin, A. C. Metodiki opredelenija i ocenki fakticheskih poter' cherez izoljaciju v vodjanyh setjah sistem centralizovannogo teplosnabzhenija bez otkljuchenija potrebitelej [Methods of identification and evaluation of actual losses through the insulation of water networks of district heating systems without disconnecting consumers] Novosti teplosnabzhenija [News of heat supply]. 2009. 5, .38 – 44.
Isachenko, V. P., Osipova, V. P., Isachenkо, V. A., Mukomel, A. S. Teploperedacha [Heat transfer]. M.-L.: Jenergija, 424 (1965).
Gerashhenko, O. A., Fedorov, V. G. Teplovye i temperaturnye izmerenija. Sprav. Rukovodstvo [Heat and temperature measurement]. Kiev: Nauk. Dumka [Scientific Thought].304 (1965).
Osipova, V. A. Jeksperimental'noe issledovanie processov teploobmena [Experimental study of heat transfer processes] M.: Jenergija. 320. (1979).
Downloads
Published
Issue
Section
License
Copyright (c) 2017 О. С. Цаканян, В. Н. Голощапов, С. В. Кошель, Н. Г. Ганжа
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
All authors agree with the following conditions:
- The authors reserve the right to claim authorship of their work and transfer to the journal the right of first publication of the work under the license agreement (the agreement).
- Authors have a right to conclude independently additional agreement on non-exclusive spreading the work in the form in which it was published by the jpurnal (for example, to place the work in institution repository or to publish as a part of a monograph), providing a link to the first publication of the work in this journal.
- Journal policy allows authors to place the manuscript in the Internet (for example, in the institution repository or on a personal web sites) both before its submission to the editorial board and during its editorial processing, as this ensures the productive scientific discussion and impact positively on the efficiency and dynamics of citation of published work (see The Effect of Open Access).
