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Applied Sciences
Special Issues
New Insights into Heat and Mass Transfer
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New Insights into Heat and Mass Transfer

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Thermal Engineering".

Deadline for manuscript submissions: closed (30 May 2023) | Viewed by 3059

Special Issue Editor

Dr. Miguel R. Oliveira Panão

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Rua Luis Reis Santos, University of Coimbra, 3030-788 Coimbra, Portugal
Interests: thermal engineering systems; renewable energy technologies; thermal design and optimization; thermal management; thermal storage; energy capture technology; thermal engineering economics; laser diagnostics; heat and fluid multiphase flows; constructal theory; information theory in data analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Heat transfer and mass transfer are processes modeled by similar mathematical equations in the case of diffusion and convection. Many engineering disciplines cover heat and mass transfer principles, from theoretical research to fundamental studies, mathematical modeling, numerical simulations, and experimental investigations. Its applications cover equipment, systems, processes, or materials.

The topics of interest include new insights but are not limited to the following: relativistic heat conduction, energy conversion and storage systems, heat exchangers, fuel cells, heat pipe, heat transfer enhancement, thermophysics, computational techniques in conduction, convection, and radiation heat transfer, thermal engineering, mass transfer phenomena and engineering, energy conversion, flow architecture optimization in convective heat transfer, informational analysis in heat transfer, ANN for modeling heat and mass transfer, radiative cooling engineering.

Dr. Miguel R. Oliveira Panão
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • energy conversion
  • heat exchangers
  • heat transfer
  • mass transfer
  • thermophysics
  • heat conduction, convective heat transfer, thermal engineering
  • radiative cooling

Published Papers (2 papers)

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Research

16 pages, 4979 KiB  
Article
Correction of Temperature from Infrared Cameras for More Precise As-Is 3D Thermal Models of Buildings
by Antonio Adán, Víctor Pérez, Amanda Ramón and Francisco J. Castilla
Appl. Sci. 2023, 13(11), 6779; https://doi.org/10.3390/app13116779 - 02 Jun 2023
Viewed by 1142
Abstract
This paper studies how to create precise 3D thermal maps of building interiors by correcting the raw apparent temperature values yielded by the thermal cameras. This matter has not, to date, been dealt with in the literature, which leads us to conclude that [...] Read more.
This paper studies how to create precise 3D thermal maps of building interiors by correcting the raw apparent temperature values yielded by the thermal cameras. This matter has not, to date, been dealt with in the literature, which leads us to conclude that the current methodologies that obtain thermal point clouds are incomplete and imprecise. Without a suitable correction, any further energy parameter calculation obtained from the thermal point cloud is incorrect. This paper presents a method that deals with important aspects to be corrected, such as the repeatability of thermal cameras, the use of the true emissivity of the materials sensed, and the inclusion of the reflected radiant energy caused by the environment. The method has been successfully tested in several indoor scenes using a thermal scanning platform. The results show that significant corrections of up to 8% of the raw temperature values must be carried out in the final thermal model, thus justifying the need for the correction. As an application of the method, an empirical calculation and a comparison of transmittances with and without temperature corrections are presented at the end of the paper. In this case, the relative errors with respect to the average nominal U-value decrease from 94% to 11%. The general conclusion is that precise calculations of energy parameters in which infrared cameras are involved must take these corrections to temperature into account. Full article
(This article belongs to the Special Issue New Insights into Heat and Mass Transfer)
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17 pages, 5678 KiB  
Article
Experimental and Numerical Testing of Heat Pump Evaporator
by Robert Santa, Mladen Bošnjaković and Ante Čikić
Appl. Sci. 2022, 12(23), 11973; https://doi.org/10.3390/app122311973 - 23 Nov 2022
Cited by 6 | Viewed by 1476
Abstract
When designing a heat pump evaporator, it is necessary to use correlations that ensure small deviations of the designed and realized process parameters for specific input data. The aim of the work is to propose a suitable mathematical model for the physical process [...] Read more.
When designing a heat pump evaporator, it is necessary to use correlations that ensure small deviations of the designed and realized process parameters for specific input data. The aim of the work is to propose a suitable mathematical model for the physical process in the tubular evaporator of the heat pump. The applicability of the proposed mathematical model in the design of the heat pump was evaluated by comparing the results obtained from the experimental tests of the tubular evaporator of the heat pump with the numerical results obtained from the application of the proposed mathematical model. For the experimental tests, a tubular evaporator was made and 10 measuring points were set up, where the process parameters were measured (temperature and pressure drop of the working media R134a and water). Theoretical results were obtained by dividing the evaporator into control volumes and solving the corresponding system of equations of the proposed mathematical model using the Runge-Kutta and Adams Moulton predictor-corrector method. As an independent parameter, the water temperature at the inlet to the evaporator was varied in the range of 10 °C to 18 °C. The test results show that the largest deviation of the calculated and measured water temperature is +0.41 °C to −0.58 °C, while the refrigerant temperature is +0.43 °C to + 0.52 °C. The largest deviation of the evaporator thermal capacity based on the calculations and experimental tests is +9.39% to −6.31%. Based on the obtained results, it is possible to recommend the use of the proposed mathematical model for the design of the tubular evaporator of a heat pump. Full article
(This article belongs to the Special Issue New Insights into Heat and Mass Transfer)
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