Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
700 7 |
Ultima descărcare din IBN: 2023-05-10 20:53 |
Căutarea după subiecte similare conform CZU |
005-75 (1) |
Management (1889) |
SM ISO690:2012 ЕПИФАНОВ, A., ДЫМО, Борис, ДОЛГАНОВ, Ю., АНАСТАСЕНКО, С.. Экспериментальное исследование двухфазных закрытых термосифонов для экономайзеров котлов. In: Problemele Energeticii Regionale, 2020, nr. 2(46), pp. 65-78. ISSN 1857-0070. DOI: https://doi.org/ 10.5281/zenodo.3898239 |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Problemele Energeticii Regionale | ||||||
Numărul 2(46) / 2020 / ISSN 1857-0070 | ||||||
|
||||||
DOI:https://doi.org/ 10.5281/zenodo.3898239 | ||||||
CZU: 005-75 | ||||||
Pag. 65-78 | ||||||
|
||||||
Descarcă PDF | ||||||
Rezumat | ||||||
Improving the reliability and reducing the overall dimensions of economizers of low-power boilers are urgent tasks. A promising direction for solving this problem is the use of two-phase closed gravitational thermosyphons. The lack of experimental data on the thermal efficiency of thermosyphons in the operating conditions of economizers of low-power boilers determines the relevance of this work. The aim of the work is an experimental study of the thermal efficiency of thermosyphons, as well as heat transfer processes during phase transitions of a working fluid (demineralized water), under operating conditions of economizers.The thermosyphon was made of a steel pipe with an internal diameter of 0.028 m: the boiling zone length of 1.5 m and the condensation – of 0.5 m. It has been established that the thermal power of the thermosyphon was varied in the range of 350...990 W with a change in air inlet temperature in the range of 190...310 °C and cooling water – of 60...100 °C. It was established that the temperature of the thermosyphon wall exceeds the dew point of the combustion products for high sulfur fuel oil by at least 5 °C. The most significant results of the work are the obtained data on the heat transfer ability of thermosyphons, as well as recommendations on the choice of dependencies for calculating the heat transfer coefficients during boiling and condensation of the working fluid. The significance of the obtained results lies in the fact that the method of thermal calculation of thermosyphon economizers was improved due to the recommended dependencies for calculating the internal thermal resistances of thermosyphons. |
||||||
Cuvinte-cheie boiler, economizer, two-phase closed thermosyphon, experimental investigation, thermal efficiency, boiling, Condensation, thermal calculation, cazan economizor termosifon în două faze închis cercetare experimentală eficiență termică fierbere condensare calcul termic, котел экономайзер двухфазный закрытый термосифон экспериментальные исследования тепловая эффективность кипение конденсация тепловой расчет |
||||||
|