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Energies
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Fluid, Energy and Thermal Comfort in Buildings
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Fluid, Energy and Thermal Comfort in Buildings

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "G: Energy and Buildings".

Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 7564

Special Issue Editors

Dr. Chuang-Yao Zhao

E-Mail Website
Guest Editor
School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, China
Interests: building energy efficiency; built environment; building simulation
Dr. Chuan-Shuai Dong

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
Interests: indoor environmental technology; flow and heat and mass transfer

Special Issue Information

Dear Colleagues,

Buildings serve as comfortable shelters for humans to live, work and produce. Throughout history, humans have created and maintained suitable environments with a variety of natural or artificial-based methods. To date, advanced technologies for building environment construction have broken through the natural limitations and further expanded people's requirements for building thermal comfort, which not only meet the basic requirements of production and life, but also provides the possibility and guarantee for some special needs. Temperature, humidity and cleanliness are important tasks in building construction. There are a large number of fluid and energy transfer problems in the creation of the building environment. The extensive and intensive studies on these problems are beneficial to improve comfort and, ultimately, save energy.

In this context, a Special Issue, entitled “Fluid, Energy and Thermal Comfort in Buildings”, was proposed for Energies, which is indexed in the Science Citation Index and Scopus. This Special Issue aims to gather review and original research papers addressing the current topics and future challenges, which not only enrich the basic theoretical knowledge, but also provide necessary reference and guidance for engineering practice. 

Dr. Chuang-Yao Zhao
Dr. Chuan-Shuai Dong
Guest Editors

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. Energies 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 2600 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

  • indoor ventilation
  • indoor air distribution
  • air quality
  • thermal comfort
  • thermal preference
  • indoor environmental system
  • thermal energy storage
  • heating ventilation and air condition (HVAC)
  • building solar energy
  • passive buildings
  • building energy efficiency
  • life cycle assessment (LCA)

Published Papers (2 papers)

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Research

17 pages, 5200 KiB  
Article
The Condensation Characteristics of Propane in Binary and Ternary Mixtures on a Vertical Plate
by Lili Zhang, Yongzhang Cui, Wenlong Mao, Xiangzhuo Sheng and Guanmin Zhang
Energies 2023, 16(16), 5873; https://doi.org/10.3390/en16165873 - 8 Aug 2023
Viewed by 800
Abstract
Natural gas is one of the most common forms of energy in our daily life, and it is composed of multicomponent hydrocarbon gas mixtures (mainly of methane, ethane and propane). It is of great significant to reveal the condensation mechanism of multicomponent mixtures [...] Read more.
Natural gas is one of the most common forms of energy in our daily life, and it is composed of multicomponent hydrocarbon gas mixtures (mainly of methane, ethane and propane). It is of great significant to reveal the condensation mechanism of multicomponent mixtures for the development and utilization of natural gas. A numerical model was adopted to analyze the heat and mass transfer characteristics of propane condensation in binary and ternary gas mixtures on a vertical cold plate. Multicomponent diffusion equations and the volume of fluid method (VOF) are used to describe the in-phase and inter-phase transportation. The conditions of different wall sub-cooled temperatures (temperature difference between the wall and saturated gas mixture) and the inlet molar fraction of methane/ethane are discussed. The numerical results show that ethane gas is more likely to accumulate near the wall compared with the lighter methane gas. The thermal resistance in the gas boundary layer is one hundred times higher than that of the liquid film, revealing the importance of diffusion resistance. The heat transfer coefficients increased about 11% (at ΔT = 10 K) and 7% (at ΔT = 40 K), as the molar fraction of ethane increased from 0 to 40%. Meanwhile, the condensation heat transfer coefficient decreased by 53~56% as the wall sub-cooled temperature increased from 10 K to 40 K. Full article
(This article belongs to the Special Issue Fluid, Energy and Thermal Comfort in Buildings)
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17 pages, 5997 KiB  
Article
Determination of Optimum Outlet Slit Thickness and Outlet Angle for the Bladeless Fan Using the CFD Approach
by Vedant Joshi, Wedyn Noronha, Vinayagamurthy G., Sivakumar R. and Rajasekarababu K. B.
Energies 2023, 16(4), 1633; https://doi.org/10.3390/en16041633 - 7 Feb 2023
Cited by 1 | Viewed by 6327
Abstract
Bladeless fans are more energy efficient, safer due to the hidden blades, easier to clean, and more adjustable than conventional fans. This paper investigates the influence of the airfoil’s outlet slit thickness on the discharge ratio by varying the outlet slit thickness of [...] Read more.
Bladeless fans are more energy efficient, safer due to the hidden blades, easier to clean, and more adjustable than conventional fans. This paper investigates the influence of the airfoil’s outlet slit thickness on the discharge ratio by varying the outlet slit thickness of an Eppler 473 airfoil from 1.2 mm to 2 mm in intervals of 0.2 mm by using a k-omega SST turbulence model with an all y+ wall treatment used to numerically simulate in CFD. The computational results indicated that smaller slits showed higher discharge ratios. The airfoil with a 1.2 mm slit thickness showed a discharge ratio of 18.78, a 24% increase from the discharge ratio of the 2 mm slit. The effect of outlet angle on the pressure drop across the airfoil was also studied. Outlet angles were varied from 16° to 26° by an interval of 2°. The airfoil profile with a 24° outlet angle showed a maximum pressure difference of 965 Pa between the slit and leading edge. In contrast, the 16° outlet angle showed the least pressure difference of 355 Pa. Parameters such as average velocity (U), turbulent kinetic energy, the standard deviation of velocity, and outlet velocity magnitude are used to assess the performance of airfoil profiles used in bladeless fan. Full article
(This article belongs to the Special Issue Fluid, Energy and Thermal Comfort in Buildings)
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