Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90240-7
{"title":"4553407 High efficiency air cycle air conditioning system","authors":"","doi":"10.1016/0198-7593(86)90240-7","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90240-7","url":null,"abstract":"","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 5","pages":"Page iv"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90240-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136407049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90089-5
{"title":"4532720 Drying process and its apparatus utilizing a refrigeration cycle","authors":"","doi":"10.1016/0198-7593(86)90089-5","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90089-5","url":null,"abstract":"","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 2","pages":"Page iv"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90089-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136439197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90213-4
PascalG Dumont, DanielM Chiron
{"title":"Inspection device for the tube plate of a heat exchanger","authors":"PascalG Dumont, DanielM Chiron","doi":"10.1016/0198-7593(86)90213-4","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90213-4","url":null,"abstract":"","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 1","pages":"Page xiii"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90213-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136557600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90222-5
N.K. Jain
Radiant fluids like CO2 and H2O, present in the flue gases, improve the heat transfer coefficient of hot gas in regenerator practice. On the same lines it has been suggested that the heat transfer coefficient of cold fluid (generally air) could be improved by steam injection. Some promising results have been published in this field. The additional steam goes to the combustion chamber and flue gases. Steam has higher specific heat and picks up heat from the process work. This fact requires the reassessment of hot gas inlet temperature (th,in) to the regenerator.
The results are represented in this paper taking care of the above fact. In earlier papers the process temperature was kept constant and heat picked up by steam ignored, for calculation of effectiveness.
{"title":"Optimum quantity of steam injected as radiant fluid in contraflow regenerators","authors":"N.K. Jain","doi":"10.1016/0198-7593(86)90222-5","DOIUrl":"10.1016/0198-7593(86)90222-5","url":null,"abstract":"<div><p>Radiant fluids like CO<sub>2</sub> and H<sub>2</sub>O, present in the flue gases, improve the heat transfer coefficient of hot gas in regenerator practice. On the same lines it has been suggested that the heat transfer coefficient of cold fluid (generally air) could be improved by steam injection. Some promising results have been published in this field. The additional steam goes to the combustion chamber and flue gases. Steam has higher specific heat and picks up heat from the process work. This fact requires the reassessment of hot gas inlet temperature (<em>t</em><sub><em>h</em>,<em>in</em></sub>) to the regenerator.</p><p>The results are represented in this paper taking care of the above fact. In earlier papers the process temperature was kept constant and heat picked up by steam ignored, for calculation of effectiveness.</p></div>","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 5","pages":"Pages 355-359"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90222-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90119711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90103-7
{"title":"4535606 High efficiency air cycle air conditioning system","authors":"","doi":"10.1016/0198-7593(86)90103-7","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90103-7","url":null,"abstract":"","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 2","pages":"Pages viii-ix"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90103-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91608663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A salt gradient laboratory solar pond made of concrete-cement having dimensions 40 × 40 × 90 cm3 has been used for this experimental study. The pond was initially filled with 15% and 20% brine solution up to one-fourth and one-third height from the bottom of the pond, respectively, and the remaining depth of the pond was filled with fresh water. The density distributions were measured several times at room temperature at intervals of ten days. Having thus obtained the stable salt density gradient, the pond was then heated from the bottom at various fixed temperatures. These fixed temperatures were raised in steps of 5°C. Salinity distribution and temperature distributions along the depth of it were measured for every operating (heating) temperature. Temperature distributions at the outer surface of the walls of the pond were also observed at each (fixed) operating temperature. Dry dune sand has been used as an insulator with different thickness surrounding the walls of the pond. Behaviour of this insulation was studied for a 45°C heating temperature by calculating the heat losses from the walls of the pond.
{"title":"Characterisation and heat losses from a laboratory salt gradient solar pond","authors":"R.S. Beniwal, Ramvir Singh, N.S. Saxena, R.C. Bhandari","doi":"10.1016/0198-7593(86)90070-6","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90070-6","url":null,"abstract":"<div><p>A salt gradient laboratory solar pond made of concrete-cement having dimensions 40 × 40 × 90 cm<sup>3</sup> has been used for this experimental study. The pond was initially filled with 15% and 20% brine solution up to one-fourth and one-third height from the bottom of the pond, respectively, and the remaining depth of the pond was filled with fresh water. The density distributions were measured several times at room temperature at intervals of ten days. Having thus obtained the stable salt density gradient, the pond was then heated from the bottom at various fixed temperatures. These fixed temperatures were raised in steps of 5°C. Salinity distribution and temperature distributions along the depth of it were measured for every operating (heating) temperature. Temperature distributions at the outer surface of the walls of the pond were also observed at each (fixed) operating temperature. Dry dune sand has been used as an insulator with different thickness surrounding the walls of the pond. Behaviour of this insulation was studied for a 45°C heating temperature by calculating the heat losses from the walls of the pond.</p></div>","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 2","pages":"Pages 105-115"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90070-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91649267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-01-01DOI: 10.1016/0198-7593(86)90069-X
O. Ta'eed, B.M. Gibbs
An attempt to experimentally and theoretically analyse the performance of an industrial short-tube () economiser operating within transitional flows () led to the development of a successful algorithm which predicted the gas-side heat transfer coefficient in this regime within . By using the successive summation technique the algorithm combined previous correlations for long-tube transition heat transfer with that for a developing velocity profile in laminar flow. The common procedure of extrapolating into the transition region by processing standard turbulent and laminar correlations with effectiveness was found to be grossly erroneous (+65–120-%).
{"title":"Determination of heat transfer coefficient in a short-tube economiser operating in the transition region","authors":"O. Ta'eed, B.M. Gibbs","doi":"10.1016/0198-7593(86)90069-X","DOIUrl":"https://doi.org/10.1016/0198-7593(86)90069-X","url":null,"abstract":"<div><p>An attempt to experimentally and theoretically analyse the performance of an industrial short-tube (<span><math><mtext>L/D < 25</mtext></math></span>) economiser operating within transitional flows (<span><math><mtext>2000 < Re < 10,000</mtext></math></span>) led to the development of a successful algorithm which predicted the gas-side heat transfer coefficient in this regime within <span><math><mtext>± 15%</mtext></math></span>. By using the successive summation technique the algorithm combined previous correlations for long-tube transition heat transfer with that for a developing velocity profile in laminar flow. The common procedure of extrapolating into the transition region by processing standard turbulent and laminar correlations with effectiveness was found to be grossly erroneous (+65–120-%).</p></div>","PeriodicalId":100786,"journal":{"name":"Journal of Heat Recovery Systems","volume":"6 2","pages":"Pages 93-104"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0198-7593(86)90069-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91649694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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