{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:20:10Z","timestamp":1760242810313,"version":"build-2065373602"},"reference-count":13,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2016,7,19]],"date-time":"2016-07-19T00:00:00Z","timestamp":1468886400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>The paper presents a simplified mathematical model to describe the transient heat transfer of a radiant floor heating system. A purpose-built test room has been realized to investigate the actual thermal response of a concrete radiant floor in unsteady-state conditions. Beyond the temperature sensors needed for the standard thermal analysis of the heat transfer inside the chamber, the floor temperature was retrieved by means of an infrared thermography camera, in order to validate more precisely the proposed analytical model. The infrared thermography analysis gives interesting information on the floor temperature distribution during the transient, highlighting the pipes\u2019 layout and, if present, inhomogeneous floor zones. The thermal images have been elaborated in order to set and tune the colour map. A portion of the image has been defined for measuring the surface floor temperatures with a previous evaluation of the parameters dealing with the thermographic technique, in order to perform the quantitative survey. The comparison results show that the calculated air and floor temperatures substantially agree with the temperatures measured by infrared thermography and thermocouples, provided that the boundary conditions obtained by the field measurements are strictly reproduced in the lumped capacitance mathematical model. The difference between the two approaches results in values lower than 4 \u00b0C during the entire monitoring period: a satisfactory outcome, considering the approximations of the analytical method. The proposed model and its infrared thermography measurements validation represent a useful tool to understand at first sight the floor radiant panels behaviour in the start-up and switch off period, at the aim of gather useful information for the difficult task of their regulation.<\/jats:p>","DOI":"10.3390\/jimaging2030022","type":"journal-article","created":{"date-parts":[[2016,7,19]],"date-time":"2016-07-19T09:48:22Z","timestamp":1468921702000},"page":"22","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Transient Heat Transfer in Radiant Floors: A Comparative Analysis between the Lumped Capacitance Method and Infrared Thermography Measurements"],"prefix":"10.3390","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4851-9269","authenticated-orcid":false,"given":"Giorgio","family":"Baldinelli","sequence":"first","affiliation":[{"name":"Department of Engineering, University of Perugia, Via G. Duranti 67, Perugia 06125, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francesco","family":"Bianchi","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Perugia, Via G. Duranti 67, Perugia 06125, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonella","family":"Rotili","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Perugia, Via G. Duranti 67, Perugia 06125, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7441-1038","authenticated-orcid":false,"given":"Andrea","family":"Presciutti","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Perugia, Via G. Duranti 67, Perugia 06125, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,7,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1016\/j.solener.2014.07.012","article-title":"On-site measured performance of a radiant floor cooling\/heating system in Xi\u2019an Xianyang International Airport","volume":"108","author":"Zhao","year":"2014","journal-title":"Sol. Energy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"166","DOI":"10.1016\/j.buildenv.2015.03.040","article-title":"A 50 years review of basic and applied research in radiant heating and cooling systems for the built environment","volume":"91","author":"Rhee","year":"2015","journal-title":"Build. Environ."},{"key":"ref_3","first-page":"19","article-title":"Radiant Floor Heating in theory and Practice","volume":"44","author":"Olesen","year":"2002","journal-title":"ASHRAE J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1617","DOI":"10.1016\/j.renene.2005.09.009","article-title":"A parametric study on radiant floor heating system performance","volume":"31","author":"Sattari","year":"2006","journal-title":"Renew. Energy"},{"key":"ref_5","unstructured":"UNI ISO 1264-2:2009 (2009). Floor Heating-Systems and Components-Determination of the Thermal Output, Comitato Termotecnico Italiano (CTI). (In Italian)."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1007\/s12273-013-0152-5","article-title":"Analytical solution for heat transfer in a multilayer floor of a radiant floor system","volume":"7","author":"Li","year":"2014","journal-title":"Build. Simul."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1753","DOI":"10.1016\/j.enbuild.2010.05.011","article-title":"A calculation method for the floor surface temperature in radiant floor system","volume":"42","author":"Jin","year":"2010","journal-title":"Energy Build."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.enbuild.2013.02.016","article-title":"Experimental and numerical analysis of lightweight radiant floor heating system","volume":"61","author":"Zhang","year":"2013","journal-title":"Energy Build."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"648","DOI":"10.1016\/j.apenergy.2014.10.058","article-title":"Thermal performance of a radiant floor heating system with different heat storage materials and heating pipes","volume":"138","author":"Zhou","year":"2015","journal-title":"Appl. Energy"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"505","DOI":"10.1016\/0890-4332(95)90061-6","article-title":"Simulation of the dynamic behaviour of a hydronic floor heating system","volume":"15","author":"Ho","year":"1995","journal-title":"Heat Recovery Syst. CHP"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"232","DOI":"10.1016\/j.solener.2013.12.033","article-title":"Dynamic performance of water-based radiant floors during start-up and high-intensity solar radiation","volume":"101","author":"Zhao","year":"2014","journal-title":"Sol. Energy"},{"key":"ref_12","unstructured":"FLIR B-Series Infrared Camera-FLIR B360, Technical Sheet. Available online: http:\/\/www.flir.com."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Minkina, W., and Dudzik, S. (2009). Infrared Thermography\u2014Errors and Uncertainties, Wiley.","DOI":"10.1002\/9780470682234"}],"container-title":["Journal of Imaging"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2313-433X\/2\/3\/22\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:26:27Z","timestamp":1760210787000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2313-433X\/2\/3\/22"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,7,19]]},"references-count":13,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2016,9]]}},"alternative-id":["jimaging2030022"],"URL":"https:\/\/doi.org\/10.3390\/jimaging2030022","relation":{},"ISSN":["2313-433X"],"issn-type":[{"type":"electronic","value":"2313-433X"}],"subject":[],"published":{"date-parts":[[2016,7,19]]}}}