New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings
A new approximate method of optimum heating cylindrical pressure elements weakened by openings was proposed. Optimum variations in fluid temperature when heating the pressure component were determined from the condition that the total circumferential stress at the edge of the opening, resulting from...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
|
| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/54/e3sconf_icchmt2019_01025.pdf |
| _version_ | 1818445269101969408 |
|---|---|
| author | Taler Dawid Dzierwa Piotr Taler Jan |
| author_facet | Taler Dawid Dzierwa Piotr Taler Jan |
| author_sort | Taler Dawid |
| collection | DOAJ |
| description | A new approximate method of optimum heating cylindrical pressure elements weakened by openings was proposed. Optimum variations in fluid temperature when heating the pressure component were determined from the condition that the total circumferential stress at the edge of the opening, resulting from the thermal load and pressure is equal to the allowable stress. The allowable stress is determined from the Wöhler fatigue diagram for a given number of start-ups and shutdowns of a power unit from the cold state. Optimum temperature changes are difficult to estimate at the beginning of the heating, usingboth exact analytical and numerical methods. In case of analytical methods, this is due to the very slow convergence of a series for near-zero time in the exact solution. In this paper, the optimum temperature changes of the fluid at the beginning of heating were determined using the heat balance integralmethod (HBIM). This method makes it possible to determine with high accuracy the temperature of the fluid for times close to zero, i.e., at the beginning of the heating process. In the second stage of heating, the optimum fluid temperature was determined on the assumption of a quasi-steady temperature field in the pressure element. |
| first_indexed | 2024-12-14T19:29:08Z |
| format | Article |
| id | doaj.art-4753810c2d844305a0e6524e15334022 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-14T19:29:08Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-4753810c2d844305a0e6524e153340222022-12-21T22:50:07ZengEDP SciencesE3S Web of Conferences2267-12422019-01-011280102510.1051/e3sconf/201912801025e3sconf_icchmt2019_01025New method for determining the optimum fluid temperature when heating pressure thick-walled components with openingsTaler DawidDzierwa PiotrTaler JanA new approximate method of optimum heating cylindrical pressure elements weakened by openings was proposed. Optimum variations in fluid temperature when heating the pressure component were determined from the condition that the total circumferential stress at the edge of the opening, resulting from the thermal load and pressure is equal to the allowable stress. The allowable stress is determined from the Wöhler fatigue diagram for a given number of start-ups and shutdowns of a power unit from the cold state. Optimum temperature changes are difficult to estimate at the beginning of the heating, usingboth exact analytical and numerical methods. In case of analytical methods, this is due to the very slow convergence of a series for near-zero time in the exact solution. In this paper, the optimum temperature changes of the fluid at the beginning of heating were determined using the heat balance integralmethod (HBIM). This method makes it possible to determine with high accuracy the temperature of the fluid for times close to zero, i.e., at the beginning of the heating process. In the second stage of heating, the optimum fluid temperature was determined on the assumption of a quasi-steady temperature field in the pressure element.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/54/e3sconf_icchmt2019_01025.pdf |
| spellingShingle | Taler Dawid Dzierwa Piotr Taler Jan New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings E3S Web of Conferences |
| title | New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings |
| title_full | New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings |
| title_fullStr | New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings |
| title_full_unstemmed | New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings |
| title_short | New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings |
| title_sort | new method for determining the optimum fluid temperature when heating pressure thick walled components with openings |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/54/e3sconf_icchmt2019_01025.pdf |
| work_keys_str_mv | AT talerdawid newmethodfordeterminingtheoptimumfluidtemperaturewhenheatingpressurethickwalledcomponentswithopenings AT dzierwapiotr newmethodfordeterminingtheoptimumfluidtemperaturewhenheatingpressurethickwalledcomponentswithopenings AT talerjan newmethodfordeterminingtheoptimumfluidtemperaturewhenheatingpressurethickwalledcomponentswithopenings |