Comparison between Direct and Indirect Heat Flux Measurement Techniques: Preliminary Laboratory Tests

Luca Evangelisti (), Leone Barbaro, Claudia Guattari, Edoardo De Cristo, Roberto De Lieto Vollaro and Francesco Asdrubali
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Luca Evangelisti: Department of Industrial, Electronic and Mechanical Engineering, Roma TRE University, Via Vito Volterra 62, 00146 Rome, Italy
Leone Barbaro: Department of Industrial, Electronic and Mechanical Engineering, Roma TRE University, Via Vito Volterra 62, 00146 Rome, Italy
Claudia Guattari: Department of Philosophy, Communication and Performing Arts, Roma TRE University, Via Ostiense 139/10, 00154 Rome, Italy
Edoardo De Cristo: Department of Industrial, Electronic and Mechanical Engineering, Roma TRE University, Via Vito Volterra 62, 00146 Rome, Italy
Roberto De Lieto Vollaro: Department of Industrial, Electronic and Mechanical Engineering, Roma TRE University, Via Vito Volterra 62, 00146 Rome, Italy
Francesco Asdrubali: Department of International Human and Social Sciences, Perugia Foreigners’ University, Piazza Fortebraccio 4, 06122 Perugia, Italy

Energies, 2024, vol. 17, issue 12, 1-16

Abstract: Direct and indirect approaches can be employed for estimating the heat flow through components in different application fields. In the building sector, the thermometric method is often applied by professionals for thermal transmittance evaluations. However, miscalculations can derive from inaccurate total heat transfer coefficients, and a consensus regarding the appropriate value to employ remains to be determined. Here, an apparatus was realized for laboratory tests and heat flux measurements were performed following direct and indirect approaches. Data acquired through a common heat flow sensor were compared with those computed through a post-processing based on radiative and convective estimations. The results were affected by the specific correlation adopted for computing the convective coefficients, with the percentage differences ranging from −9.8% to −0.4%. New measurement systems could be designed for automatically computing heat fluxes through indirect approaches, thus providing alternative solutions in the panorama of non-destructive tests for building energy diagnosis.

Keywords: heat flow meter sensor; indirect approach for heat flow estimation; convective and radiative coefficients; non-destructive test; data processing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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