The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes
At slightly supercritical pressure and in the neighborhood of the pseudo-critical temperature (defined as the temperature corresponding to the peak in specific heat at the operating pressure), the heat transfer coefficient between fluid and tube wall is strongly dependent on the heat flux. For large...
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| Format: | Technical Report |
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Cambridge, Mass. : M.I.T. Engineering Projects Laboratory, [1968]
2011
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| Online Access: | http://hdl.handle.net/1721.1/61489 |
| _version_ | 1826213295968747520 |
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| author | Shiralkar, B. S. Griffith, P. |
| author2 | Massachusetts Institute of Technology. Dept. of Mechanical Engineering. |
| author_facet | Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Shiralkar, B. S. Griffith, P. |
| author_sort | Shiralkar, B. S. |
| collection | MIT |
| description | At slightly supercritical pressure and in the neighborhood of the pseudo-critical temperature (defined as the temperature corresponding to the peak in specific heat at the operating pressure), the heat transfer coefficient between fluid and tube wall is strongly dependent on the heat flux. For large heat fluxes, a marked deterioration takes place in the heat transfer coefficient in the region where the bulk fluid temperature is below and the wall temperature above the pseudo-critical temperature. An analysis has been developed, based on the integration of the transport equations, to predict the deterioration in heat transfer at high heat fluxes, and the results have been compared with the previously available experimental results for steam. Experiments have been performed with carbon dioxide for additional comparison. Limits of safe operation in terms of the allowable heat flux for a particular flow rate have been determined both theoretically and experimentally. Experiments with twisted tape inserted in the test section to generate swirl have shown that the heat transfer rates can be improved by this method. Qualitative visual observations have been made of the flow under varying conditions of heat flux and flow rate. |
| first_indexed | 2024-09-23T15:46:49Z |
| format | Technical Report |
| id | mit-1721.1/61489 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:46:49Z |
| publishDate | 2011 |
| publisher | Cambridge, Mass. : M.I.T. Engineering Projects Laboratory, [1968] |
| record_format | dspace |
| spelling | mit-1721.1/614892019-04-10T18:06:07Z The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes Shiralkar, B. S. Griffith, P. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Division of Sponsored Research. Massachusetts Institute of Technology. Heat Transfer Laboratory. Heat -- Transmission. Pressure. At slightly supercritical pressure and in the neighborhood of the pseudo-critical temperature (defined as the temperature corresponding to the peak in specific heat at the operating pressure), the heat transfer coefficient between fluid and tube wall is strongly dependent on the heat flux. For large heat fluxes, a marked deterioration takes place in the heat transfer coefficient in the region where the bulk fluid temperature is below and the wall temperature above the pseudo-critical temperature. An analysis has been developed, based on the integration of the transport equations, to predict the deterioration in heat transfer at high heat fluxes, and the results have been compared with the previously available experimental results for steam. Experiments have been performed with carbon dioxide for additional comparison. Limits of safe operation in terms of the allowable heat flux for a particular flow rate have been determined both theoretically and experimentally. Experiments with twisted tape inserted in the test section to generate swirl have shown that the heat transfer rates can be improved by this method. Qualitative visual observations have been made of the flow under varying conditions of heat flux and flow rate. Sponsored by American Electric Power Service Corp. 2011-03-04T23:37:07Z 2011-03-04T23:37:07Z 1968 Technical Report 14090010 http://hdl.handle.net/1721.1/61489 Technical report (Massachusetts Institute of Technology, Heat Transfer Laboratory) ; no. 55. 180, [5] p application/pdf Cambridge, Mass. : M.I.T. Engineering Projects Laboratory, [1968] |
| spellingShingle | Heat -- Transmission. Pressure. Shiralkar, B. S. Griffith, P. The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title | The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title_full | The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title_fullStr | The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title_full_unstemmed | The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title_short | The deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| title_sort | deterioration in heat transfer to fluids at supercritical pressure and high heat fluxes |
| topic | Heat -- Transmission. Pressure. |
| url | http://hdl.handle.net/1721.1/61489 |
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