{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T04:30:34Z","timestamp":1772253034367,"version":"3.50.1"},"reference-count":20,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2019,4,9]],"date-time":"2019-04-09T00:00:00Z","timestamp":1554768000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Waste heat dissipated in the exhaust system in a combustion engine represents a major source of energy to be recovered and converted into useful work. A waste heat recovery system (WHRS) based on an Organic Rankine Cycle (ORC) is a promising approach, and it gained interest in the last few years in an automotive industry interested in reducing fuel consumption and exhaust emissions. Understanding the thermodynamic response of the boiler employed in an ORC plays an important role in steam cycle performance prediction and control system design. The aim of this study is, therefore, to present a methodology to study these devices by means of pattern recognition with infrared thermography. In addition, the experimental test bench and its operating conditions are described. The methodology proposed identifies the wall coordinates, traces the paths, and tracks the wall temperature along them in a way that can be exported for subsequent post-processing and analysis. As for the results, through the wall temperature paths on both sides (exhaust gas and working fluid), it was possible to quantitatively estimate the temperature evolution along the boiler and, in particular, the beginning and end of evaporation.<\/jats:p>","DOI":"10.3390\/s19071680","type":"journal-article","created":{"date-parts":[[2019,4,9]],"date-time":"2019-04-09T05:58:07Z","timestamp":1554789487000},"page":"1680","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Development of a Pattern Recognition Methodology with Thermography and Implementation in an Experimental Study of a Boiler for a WHRS-ORC"],"prefix":"10.3390","volume":"19","author":[{"given":"Concepci\u00f3n","family":"Paz","sequence":"first","affiliation":[{"name":"School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, 36310 Vigo, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9920-3291","authenticated-orcid":false,"given":"Eduardo","family":"Su\u00e1rez","sequence":"additional","affiliation":[{"name":"School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, 36310 Vigo, Spain"}]},{"given":"Miguel","family":"Concheiro","sequence":"additional","affiliation":[{"name":"School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, 36310 Vigo, Spain"}]},{"given":"Antonio","family":"Diaz","sequence":"additional","affiliation":[{"name":"School of Industrial Engineering, University of Vigo, Campus Universitario Lagoas-Marcosende, 36310 Vigo, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2019,4,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/j.energy.2012.11.001","article-title":"Analysis of vehicle exhaust waste heat recovery potential using a Rankine cycle","volume":"49","author":"Domingues","year":"2013","journal-title":"Energy"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Park, T., Teng, H., Hunter, G.L., van der Velde, B., and Klaver, J. (2011). A Rankine Cycle System for Recovering Waste Heat from HD Diesel Engines\u2014Experimental Results. SAE Int.","DOI":"10.4271\/2011-01-1337"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"3406","DOI":"10.1016\/j.energy.2011.03.041","article-title":"Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery","volume":"36","author":"Wang","year":"2011","journal-title":"Energy"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2862","DOI":"10.1016\/j.rser.2011.03.015","article-title":"A review of researches on thermal exhaust heat recovery with Rankine cycle","volume":"15","author":"Wang","year":"2011","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"6821","DOI":"10.1016\/j.energy.2011.10.014","article-title":"A combined thermodynamic cycle used for waste heat recovery of internal combustion engine","volume":"36","author":"He","year":"2011","journal-title":"Energy"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.apenergy.2012.12.060","article-title":"Dynamic heat exchanger model for performance prediction and control system design of automotive waste heat recovery systems","volume":"105","author":"Horst","year":"2013","journal-title":"Appl. Energy"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1210","DOI":"10.1016\/j.energy.2006.07.001","article-title":"Working fluids for low-temperature organic Rankine cycles","volume":"32","author":"Saleh","year":"2007","journal-title":"Energy"},{"key":"ref_8","unstructured":"Schmid, H. (2004, January 28\u201329). Less Emission Through Waste Heat Recovery. Proceedings of the Green Ship Technology Conference, London, UK."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Teng, H. (2010). Waste Heat Recovery Concept to Reduce Fuel Consumption and Heat Rejection from a Diesel Engine. SAE Int.","DOI":"10.4271\/2010-01-1928"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/j.infrared.2018.01.023","article-title":"Analysis of lubricating oils in shear friction tests using infrared thermography","volume":"89","author":"Silva","year":"2018","journal-title":"Infrared Phys. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"568","DOI":"10.1016\/j.applthermaleng.2015.10.084","article-title":"Infrared thermography measurement of two-phase boiling flow heat transfer in a microchannel","volume":"94","author":"Liu","year":"2016","journal-title":"Appl. Therm. Eng."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"3275","DOI":"10.1016\/S0017-9310(02)00048-0","article-title":"A uniform temperature heat sink for cooling of electronic devices","volume":"45","author":"Hetsroni","year":"2002","journal-title":"Int. J. Heat Mass Transf."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"568","DOI":"10.1016\/j.ijmultiphaseflow.2006.02.004","article-title":"Flow instability and transient flow patterns inside intercrossed silicon microchannel array in a micro-timescale","volume":"32","author":"Xu","year":"2006","journal-title":"Int. J. Multiph. Flow"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"410","DOI":"10.1016\/j.applthermaleng.2015.01.003","article-title":"Quantification of liquid refrigerant distribution in parallel flow microchannel heat exchanger using infrared thermography","volume":"78","author":"Li","year":"2015","journal-title":"Appl. Therm. Eng."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Leblay, P., Henry, J.F., Caron, D., Leducq, D., Bontemps, A., and Fournaison, L. (2012, January 11\u201314). Infrared Thermography applied to measurement of Heat transfer coefficient of water in a pipe heated by Joule effect. Proceedings of the 11th Quantitative InfraRed Thermography, Naples, Italy.","DOI":"10.21611\/qirt.2012.376"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1187","DOI":"10.1007\/s00348-010-0912-2","article-title":"Infrared thermography for convective heat transfer measurements","volume":"49","author":"Carlomagno","year":"2010","journal-title":"Exp. Fluids"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"396","DOI":"10.1016\/j.energy.2018.06.017","article-title":"Comparison of working fluids and cycle optimization for heat recovery ORCs from large internal combustion engines","volume":"158","author":"Scaccabarozzi","year":"2018","journal-title":"Energy"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1145\/361237.361242","article-title":"Use of the Hough Transformation to Detect Lines and Curves in Pictures","volume":"15","author":"Duda","year":"1972","journal-title":"Commun. ACM"},{"key":"ref_19","unstructured":"Hough, P.V.C. (1962). Method for Recognizing Complex Patterns. (3,069,654), U.S. Patent."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1016\/j.patcog.2017.08.008","article-title":"Recognition of feature curves on 3D shapes using an algebraic approach to Hough transforms","volume":"73","author":"Torrente","year":"2018","journal-title":"Pattern Recogn."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/7\/1680\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:43:49Z","timestamp":1760186629000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/7\/1680"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,4,9]]},"references-count":20,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2019,4]]}},"alternative-id":["s19071680"],"URL":"https:\/\/doi.org\/10.3390\/s19071680","relation":{"has-preprint":[{"id-type":"doi","id":"10.20944\/preprints201903.0083.v1","asserted-by":"object"}]},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,4,9]]}}}