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Journal articles on the topic 'Thermal'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 December 2024

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1

Lee, Seung-Rae. "Thermal Behavior of Energy Pile Considering Ground Thermal Conductivity and Thermal Interference Between Piles." Journal of the Korean Society of Civil Engineers 33, no. 6 (2013): 2381. http://dx.doi.org/10.12652/ksce.2013.33.6.2381.

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2

Cowling, I. D., S. Willcox, Y. Patel, P. Smith, and M. Roberts. "Increasing persistence of UAVs and MAVs through thermal soaring." Aeronautical Journal 113, no. 1145 (July 2009): 479–89. http://dx.doi.org/10.1017/s0001924000003146.

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Abstract This work looks to harness atmospheric energy through thermal soaring to optimise the flight persistence of Micro Air Vehicles (MAVs) and Unmanned Air Vehicles (UAVs). There are two key challenges when considering thermal soaring, the first being the locating of thermals and the second being the extraction of the maximum potential energy from the thermals. Thermal location is by no means an exact science with experienced glider pilots needing to consider many factors to improve the probability of encountering a thermal. As thermals are caused by the uneven heating of the Earth’s surface it is, however, possible to predict likely thermal locations. With the application of a suitable guidance algorithm which considers these ‘hot spots’ it is possible to increase the likelihood of encountering a thermal. Once a thermal is found it is important to attempt to extract the maximum energy from the thermal. To do this the vehicle needs to move quickly to the centre of the thermal. There are many potential techniques for thermal centring, some of which appear to be entirely contradictory to each other, the crucial factor determining the success of such a technique has been found to be the response time of the onboard sensors. This paper considers the many aspects of thermal soaring such as locating thermals, thermal detection and thermal centring. Five different thermal models are presented which are used to demonstrate the thermal centring techniques. Finally a commercial glider simulation package is used to demonstrate the control architecture and simulate a fully autonomous flight.

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3

Fitch, J. S., L. Monier, and H. Tamet. "Thermap: a thermal model for microprocessors." IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part A 18, no. 3 (1995): 553–58. http://dx.doi.org/10.1109/95.465152.

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4

DAHAM, Sadoon R., Nebras H. GHAEB, and Faiz F. MUSTAFA. "Topographical thermal imaging for solid square shaft cooling." Journal of Thermal Engineering 7, no. 14 (December 30, 2021): 1970–79. http://dx.doi.org/10.18186/thermal.1051323.

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5

Hayashi, Morihito, and Hayato Mouri. "E-3 MONOSEMOUSNESS OF THERMAL PLASTIC STRAIN ON THERMAL FATIGUE LIFE IN FERRITE DUCTILE CAST IRON(Session: Thermal Fatique/Creep)." Proceedings of the Asian Symposium on Materials and Processing 2006 (2006): 95. http://dx.doi.org/10.1299/jsmeasmp.2006.95.

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6

Graetsch, Heribert A. "Thermal expansion and thermally induced variations of the crystal structure of AlPO4 low cristobalite." Neues Jahrbuch für Mineralogie - Monatshefte 2003, no. 7 (July 15, 2003): 289–301. http://dx.doi.org/10.1127/0028-3649/2003/2003-0289.

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7

Tolibjonovich, Tojiboyev Boburjon. "LIQUID COMPOSITE THERMAL INSULATION COATINGS AND METHODS FOR DETERMINING THEIR THERMAL CONDUCTIVITY." International Journal of Advance Scientific Research 02, no. 03 (March 1, 2022): 42–50. http://dx.doi.org/10.37547/ijasr-02-03-07.

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The article describes the analysis of existing methods for determining the thermal conductivity of liquid composite thermal insulation coatings and the results of experimental studies on its improvement.

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8

Tarshish, Nathaniel, Nadir Jeevanjee, and Daniel Lecoanet. "Buoyant Motion of a Turbulent Thermal." Journal of the Atmospheric Sciences 75, no. 9 (August 28, 2018): 3233–44. http://dx.doi.org/10.1175/jas-d-17-0371.1.

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Abstract By introducing an equivalence between magnetostatics and the equations governing buoyant motion, we derive analytical expressions for the acceleration of isolated density anomalies (thermals). In particular, we investigate buoyant acceleration, defined as the sum of the Archimedean buoyancy B and an associated perturbation pressure gradient. For the case of a uniform spherical thermal, the anomaly fluid accelerates at 2B/3, extending the textbook result for the induced mass of a solid sphere to the case of a fluid sphere. For a more general ellipsoidal thermal, we show that the buoyant acceleration is a simple analytical function of the ellipsoid’s aspect ratio. The relevance of these idealized uniform-density results to turbulent thermals is explored by analyzing direct numerical simulations of thermals at a Reynolds number (Re) of 6300. We find that our results fully characterize a thermal’s initial motion over a distance comparable to its length. Beyond this buoyancy-dominated regime, a thermal develops an ellipsoidal vortex circulation and begins to entrain environmental fluid. Our analytical expressions do not describe the total acceleration of this mature thermal, but they still accurately relate the buoyant acceleration to the thermal’s mean Archimedean buoyancy and aspect ratio. Thus, our analytical formulas provide a simple and direct means of estimating the buoyant acceleration of turbulent thermals.

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9

Sobamowo, M. G. "THERMAL PERFORMANCE ANALYSIS OF CONVECTIVE-RADIATIVE FIN WITH TEMPERATURE-DEPENDENT THERMAL CONDUCTIVITY IN THE PRESENCE OF UNIFORM MAGNETIC FIELD USING PARTIAL NOETHER METHOD." Journal of Thermal Engineering 4, no. 5 (June 28, 2018): 2287–302. http://dx.doi.org/10.18186/thermal.438485.

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10

Kishore, Abhishek, and Ameen Uddin Ahmad. "Ocean Thermal Energy Conversion." International Journal of Trend in Scientific Research and Development Volume-1, Issue-5 (August 31, 2017): 412–15. http://dx.doi.org/10.31142/ijtsrd2314.

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11

Sinha, Dr Deepa A. "Thermal Properties of Concrete." Paripex - Indian Journal Of Research 3, no. 2 (January 15, 2012): 90–91. http://dx.doi.org/10.15373/22501991/feb2014/27.

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12

Saeed, Sarkawt Abdul-Rahman, Shler Saeed Qadir, and Riyadh Hanna Shaan. "Thermal Insulating Concrete Tiles." Journal of Zankoy Sulaimani - Part A 10, no. 1 (February 6, 2007): 53–58. http://dx.doi.org/10.17656/jzs.10163.

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13

Ambli, Kushal G., B. M. Angadi, and Mohan B. Vanarotti. "Thermal Behaviour of Tamarind Seed Kernel Based Bio-Composites Intended for Thermal Insulation." Indian Journal of Science and Technology 15, no. 19 (May 19, 2022): 927–37. http://dx.doi.org/10.17485/ijst/v15i19.75.

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14

Fan, Jiang, Toh Peng Seng, Goh Leag Hua, Leung Kin On, and Kelvin Loh. "Design and Thermal Performance Test of a Solar Photovoltaic/Thermal (PV/T) Collector." Journal of Clean Energy Technologies 4, no. 6 (2016): 435–39. http://dx.doi.org/10.18178/jocet.2016.4.6.327.

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15

Fu, Youyi, Chuanwei Zhang, and Frank E. Talke. "MoA-1-1 Thermal response of a thermal asperity sensor to disk asperities." Proceedings of JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment : IIP/ISPS joint MIPE 2015 (2015): _MoA—1–1–1—_MoA—1–1–3. http://dx.doi.org/10.1299/jsmemipe.2015._moa-1-1-1.

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16

Zhelykh, Vasyl, Yurii Furdas, and Oleh Khamets. "EVALUATION OF THERMAL RESISTANCE OF EXTERNAL PROTECTION DURING THERMAL RENOVATION OF THE BUILDING." Theory and Building Practice 2022, no. 2 (December 20, 2022): 83–89. http://dx.doi.org/10.23939/jtbp2022.02.083.

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Currently, the problem of energy-saving construction remains extremely relevant. The application of thermorenovation measures for existing public and residential buildings is one of the ways to solve the problem of rational use of fuel and energy resources. In this article, one of the thermorenovation measures is considered, in particular, the installation of additional external insulation to insulate external walls on the example of a general secondary education institution. The results of the research made it possible to evaluate the thermal stability of the fences as a result of insulation, so it was established that gas consumption and gross carbon dioxide emissions when using insulation with a thickness of 150 mm is reduced by almost 4.5 times. The proposed thermoregulation measures bring buildings into compliance with state regulations and increase indoor comfort by equalizing the average temperature and eliminating cold bridges.

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17

FERROUDJ, Nawal, and Hasan KÖTEN. "NUMERICAL SIMULATION OF PRANDTL NUMBER EFFECT ON ENTROPY GENERATION IN A SQUARE CAVITY." Journal of Thermal Engineering 7, no. 4 (May 2, 2021): 1016–29. http://dx.doi.org/10.18186/thermal.931364.

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18

HATAMİ, M., Farooq ALİ, Ammar ALSABERY, Songwei HU, D. JİNG, and Hameed K. "MIXED CONVECTION HEAT TRANSFER OF SIO2-WATER AND ALUMINA-PAO NANO-LUBRICANTS USED IN A MECHANICAL BALL BEARING." Journal of Thermal Engineering 7, no. 2 (February 1, 2021): 134–61. http://dx.doi.org/10.18186/thermal.871348.

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19

AL-GEBORY, Layth. "OPTICAL AND RADIATIVE PROPERTIES OF INDIVIDUAL AND HYBRID NANOSUSPENSIONS: THE EFFECTS OF SIMILAR AND DISSIMILAR PARTICLE AGGLOMERATES ON THERMAL RADIATION." Journal of Thermal Engineering 7, no. 2 (February 1, 2021): 174–86. http://dx.doi.org/10.18186/thermal.871304.

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20

ÜNSÜR, Veysel. "STABILIZATION OF MINORITY CARRIER LIFETIME IN PERC STRUCTURED SILICON SOLAR CELL." Journal of Thermal Engineering 7, no. 2 (February 1, 2021): 187–95. http://dx.doi.org/10.18186/thermal.871308.

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21

"Thermal Instability." International Journal of Science and Research (IJSR) 5, no. 3 (March 5, 2016): 609–12. http://dx.doi.org/10.21275/v5i3.nov161898.

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22

"Thermal and Non-Thermal Plasma for Destruction of Pollutants." Journal of Plasma Chemistry and Plasma Processing Research 2, no. 1 (May 10, 2022). http://dx.doi.org/10.33140/jpcppr.02.01.03.

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Wastewater remediation has become a global concern; thus, the development of innovative advanced oxidation processes (AOPs) for wastewater treatment is still a major challenge. Advanced oxidation processes (AOPs) are innovative tools that involve an introduction of energy (e.g., chemical, electrical and radiative) into the reaction zone to generate highly reactive species, especially hydroxyl radicals (HO•). In this sense, plasma technology is included among AOPs and considered as a promising remediation technology for water remediation. Developed since 1987 [1], the technique is environmentally friendly, simple and effective for decomposing toxic organic compounds in raw water or wastewater [2 - 4]. In view of these facts, applications of atmospheric pressure electrical plasma technologies for water treatment attract the increasing interest and emerge as technological opportunities for the plasma community [5].

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23

"Thermal and Non-Thermal Plasma for Destruction of Pollutants." Journal of Plasma Chemistry and Plasma Processing Research 2, no. 1 (February 5, 2021). http://dx.doi.org/10.33140/jpcppr.02.01.01.

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Wastewater remediation has become a global concern; thus, the development of innovative advanced oxidation processes (AOPs) for wastewater treatment is still a major challenge. Advanced oxidation processes (AOPs) are innovative tools that involve an introduction of energy (e.g., chemical, electrical and radiative) into the reaction zone to generate highly reactive species, especially hydroxyl radicals (HO•). In this sense, plasma technology is included among AOPs and considered as a promising remediation technology for water remediation. Developed since 1987 [1], the technique is environmentally friendly, simple and effective for decomposing toxic organic compounds in raw water or wastewater [2 - 4]. In view of these facts, applications of atmospheric pressure electrical plasma technologies for water treatment attract the increasing interest and emerge as technological opportunities for the plasma community [5].

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24

NUWAYHID, Rida Y. "Thermal analysis of photovoltaic-thermoelectric hybrids." Journal of Thermal Engineering, 2024, 1149–63. http://dx.doi.org/10.14744/thermal.0000858.

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25

ATGUR, Vinay, Gowda MANAVENDRA, G. p. DESAI, and B. NAGESWARA RAO. "Experimental investigation on thermal conductivity and thermal degredation of Honge oil methyl ester with B-20 blend." Journal of Thermal Engineering, November 22, 2021, 1604–13. http://dx.doi.org/10.18186/thermal.1026846.

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26

PUTU SUSASTRIAWAN, Anak Agung, Yuli PURWANTO, Bambang Wahyu SIDHARTA, and Noval SIOLIMBONA. "Thermal performance of cocoa pod cook stove." Journal of Thermal Engineering, June 22, 2022, 188–95. http://dx.doi.org/10.18186/thermal.1429918.

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Indonesia produces approximately 550.000 ton/year of cocoa pod waste from chocolate indus-try. The waste has a good potential to be used as a biomass feedstock of a cook stove. How-ever, thermal performance of the conventional cook stove is low when using a high moisture content feedstock, such as a cocoa pod waste. In addition, conventional cook stove generates high pollutant when high moisture content feedstock is used. In other to encounter the prob-lems, the present work develops gasifier based cocoa pod cook stove and investigates thermal performance of the stove at various equivalence ratios. The data collection is performed by varying equivalence ratio at 0.4, 0.5, and 0.6. Temperature of the stove, flame image, flame temperature, and water temperature are collected and used to analyze the thermal perfor-mance (i.e. useful heat and thermal efficiency) of the stove. The results reveal that a waste of cocoa pod can be used as a feedstock of gasifier based cook stove. Maximum useful heat of 1337.6 kJ and maximum thermal efficiency of 3.5% are obtained at optimum equivalence ratio of 0.5. To improve performance of the stove, the cocoa pod waste should be sun dried to reduce its moisture content and the porous burner may be applied as a burner of the gasifier based cook stove in the future work.

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27

Baidak, Yurii. "METHOD OF INDIRECT DETERMINATION OF THERMAL LOAD PARAMETER." Journal of Thermal Engineering, February 25, 2019, 84–92. http://dx.doi.org/10.18186/thermal.532158.

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28

Dalkilic, Ahmet Selim. "DETERMINATION OF SOME DOMESTIC RADIATORS’ THERMAL CAPACITY NUMERICALLY." Journal of Thermal Engineering, June 24, 2019, 251–70. http://dx.doi.org/10.18186/thermal.581754.

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29

SINGH, Udayvir, and Naveen Kumar GUPTA. "Thermal performance analysis of heat pipe using response surface methdologyUdayvir." Journal of Thermal Engineering, April 5, 2023, 411–23. http://dx.doi.org/10.18186/thermal.1277897.

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Heat pipes are the specific class of heat exchangers. They are used in thermal management of electronic components. Research community is continuously working to obtain the optimum heat transfer performance. In present work, parametric study of heat pipe using nano- fluid has been carried out. The operating parameters of heat pipe like power supply, orientation (gravity assisted angle), filling- ratio, and nano-fluids concentration are being investigated to find the optimum thermal performance of heat pipe. Response surface method (RSM) is used to analyze the effect of operating parameters on thermal performance. The optimum value of thermal resistance and thermal efficiency are 0.3994 °C/Watt and 68.44% respectively. Most suitable power supply, inclination angle, filling ratio and nanofluid concentration are 185.85 W, 60.09°, 50.7% and 1.05 % respectively. The experimental results confirm and validate the RSM predicted results.

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30

J. ASALEKAR, Amol, D. v. A. RAMA SASTRY, M. b. s. Sreekara REDDY, and Surendra D. BAREWAR. "Analysis of thermophysical properties of novel hybrid nanoparticles based vegetable nanofluid." Journal of Thermal Engineering, May 22, 2023, 1466–77. http://dx.doi.org/10.18186/thermal.1397183.

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Nano additive-based vegetable-oil fluids are playing a vital role in conventional thermal appli-cations due to their contribution to improved thermophysical properties. This work is focused on the synthesis and characterization of a novel ZnO-Ag hybrid nanoparticles-based sun-flower oil for thermal applications. Firstly, the ZnO-Ag hybrid nanoparticles were prepared by a wet chemical approach and characterized using SEM and TEM. The synthesized hybrid nanoparticles were then mixed in the sunflower oil to prepare various nanofluids at different volume concentrations ranging from 0.05 to 0.20%. The stability of the prepared nanofluids was investigated as a function of Zeta potential and visual examination. Further, the thermal conductivity and viscosity of prepared nanofluids were measured by the KD2-pro analyzer and Brookfield viscometer. The result showed that the thermal conductivity of prepared nano-fluids was increased up to 21.01% at 0.20% nanoparticles volume concentration. Finally, an artificial neural network model was developed to accurately predict the thermal conductivity of prepared nanofluids.

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31

NOOR, Dedy, Heru MIRMANTO, Joko SARSETIYANTO, and Denny SOEDJONO. "Flow behavior and thermal separation mechanism on vortex tube." Journal of Thermal Engineering, August 2, 2021, 1090–99. http://dx.doi.org/10.18186/thermal.977941.

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32

Yilbas, Bekir Sami. "COST EFFECTIVE OPERATION OF HVAC SYSTEM UNDER THERMAL DISTURBANCE." Journal of Thermal Engineering, June 24, 2019, 302–18. http://dx.doi.org/10.18186/thermal.581777.

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33

HAJİBEİGY, Mohammad Taghi, Rashmi WALVEKAR, and Aravind CV. "MATHEMATICAL MODELLING, SIMULATION ANALYSIS OF A PHOTOVOLTAIC THERMAL SYSTEM." Journal of Thermal Engineering, December 30, 2020, 291–306. http://dx.doi.org/10.18186/thermal.850645.

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34

JANI, Mohammad Nazirul Syafiqaiman, and Nawaf SAEİD. "Thermal stress analysis in pin fin microchannel heat sink." Journal of Thermal Engineering, March 2, 2023, 273–85. http://dx.doi.org/10.18186/thermal.1448547.

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The conjugate heat transfer and the thermal stresses produced within a pin-fin microchannel heat sink are investigated numerically. The pin-fin microchannel heat sink is subjected to a constant heat flux from the bottom surface and cooled by water flow through the channel across the pin fins. Rectangular cross-section microchannel incorporating one raw of square pin fins are considered. The water flowing through the microchannel at Reynolds number varies from 200 to 800. The heat sink dissipates constant heat flux in the range of 75-175 kW/m2. The selected materials used for the solid substrate are Copper, Aluminium, Titanium, and Structural steel. The results are presented as contour plots for the temperature, thermal stress, and deformation distribution. It is found that the heat dissipation and the Nusselt number are increased with increasing Reynolds number, increasing the thermal conductivity of the mate-rial but remain constant throughout various heat fluxes. Thermal stresses are increased with decreasing Reynolds number, increasing heat flux, and increasing Youngs’ Modulus of the substrate material. The total deformation is increased with decreasing Reynolds number, in-creasing heat flux, and increasing the thermal expansion coefficient of the substrate material.

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35

BENTOUMI, L. "Impact of thermal insulation on energy consumption in buildings." Journal of Thermal Engineering, 2024, 924–35. http://dx.doi.org/10.14744/thermal.0000841.

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36

KAMRAN, Mohammad, and Adnan QAYOUM. "Investigation of thermo-rheological properties of Fe3O4/Ethylene glycol nanofluid in a square cavity." Journal of Thermal Engineering, May 28, 2022, 1324–38. http://dx.doi.org/10.18186/thermal.1377221.

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Many fluids used in heat transfer and transport phenomena restrict the effectiveness of heat exchange equipment on account of their low thermal conductivity. Using nanofluids, the ef-fectiveness of heat exchange equipment is enhanced by many folds. The use of magnetic nano-fluids for heat transfer generates a prospect of regulating flow and controlling the thermal and transport properties particularly the thermal conductivity and viscosity using an externally applied magnetic field. The present study involves synthesis of oleic acid-coated magnetic nanofluids at varying concentrations of 0 to 0.643% by volume, measurement of thermal conductivity, rheological properties and corresponding numerical simulation of Nanofluid in a heated square cavity. The thermal conductivity measurement have been carried out by transient hot-wire method using KD2-pro at varying concentrations of solid phase. The re-sults show a significant increase in thermal conductivity with increase in particle concentra-tion. Rheological measurements show variation in viscosity with shear rate, temperature and concentration. Moreover, it has been found that at low particle loading magnetic nanofluids exhibited Newtonian behavior unlike non-Newtonian behavior at increased concentration. Numerical simulation of the magnetic nanofluid in the heated square cavity demonstrates the immense potential of augmentation of heat transfer coefficient using such fluids.

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37

GHARDE, Pankaj R., and Sanjay N. HAVALDAR. "Numerical investigation of an amalgamation of two phase change materials thermal energy storage system." Journal of Thermal Engineering, May 29, 2022, 263–72. http://dx.doi.org/10.18186/thermal.1448527.

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In the last three decades, many researchers have published their findings on the storage of thermal energy using various phase transition materials (both organic and non-organic). One of their goals was to have a higher heat storage capacity with a shorter heat charging cycle for thermal energy storage. This study looked into a floating capsule thermal energy storage system (TESS). A number of spherical capsules filled with beeswax were placed in a paraffin-filled cylindrical shell. With heat transfer fluid flowing through three hexagonal tubes arranged at 120° inside the TESS core, the two phase change materials (beeswax with a thermal conductivity of 0.25 W/mK and paraffin with a thermal conductivity of 0.23 W/mK) were charged and discharged. For the proposed TESS, a mathematical model was created and utilised to forecast thermal energy storage capacity and charging/discharge times for various configurations. In TESS, a 70–30% mixture of the two PCMs results in a 21.5 percent increase in heat storage capacity when beeswax alone is used, and an 8.4 percent decrease in storage capacity when paraffin alone is used. For a heat storage capacity of 7300 kJ, the model estimates charging and discharging times of around 2.6 and 3.2 hours, respectively.

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ÖZTUNA TANER, Öznur. "Energy and production analysis of a dairy milk factory: A case of study." Journal of Thermal Engineering, August 30, 2023, 1166–79. http://dx.doi.org/10.18186/thermal.1370731.

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This study illustrates a factory’s production efficiency by demonstrating its energy efficiency in the dairy milk industry. Determining the thermal energy to save energy enhances the prof-itability of the factory. The aim of this study is to conduct a thermal energy and production analysis of a dairy milk factory based on annual production. This study intends to make the conclusions more realistic by using production and energy data dependability analysis. The overall power consumption for the thermal and electric energy processes was found to be as 180,520 [W]. The target-specific energy consumption value was computed for Case 1 as 6,352.14 [MJ/t], for Case 2 as 5,898.67 [MJ/t], and for Case 3 as 5,445.21 [MJ/t]. The annual thermal (steam boiler) and electrical energy expenditures were obtained, with 315.87 [kW] of thermal (steam) energy and 80.98 [kW] of electrical energy. The total thermal and electri-cal energy reached 396.85 [kW]. Despite the factory’s expenditure on thermal and electrical energy, the energy efficiency was determined to be as 45.5%. The input energy was obtained to be 374.24 [kW] in Case 1, 356.33 [kW] in Case 2, and 342.08 [kW] in Case 3. The energy efficiency was calculated as 48.2 [%] for Case 1, 50.7 [%] for Case 2, and 52.8 [%] for Case 3. This study, which is expected to inspire future research, is also likely to assist livestock and agriculture in the energy field. The novelty of this study is that optimizing product efficiency and energy consumption in the production of milk and dairy products positively increases the energy efficiency of factories.

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39

LAKRAFLI, Hicham, Soufiane TAHIRI, Mohamed SENNOUNE, and Abdelmajid BOUARDI. "Improving the energy efficiency of a refrigerated warehouse through the use of palm tree pruning waste as thermal insulator." Journal of Thermal Engineering, April 14, 2023, 332–41. http://dx.doi.org/10.18186/thermal.1283362.

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This work investigates the effect of palm tree pruning waste (PTPW) on thermal insulation and energy consumption of a refrigerated warehouse (RW). The thermal properties of PTPW depend strongly on its compactness, i.e. how much it weighs divided by how much space it takes up. The thermal conductivity of PTPW measured using the box method is about 0.069 W/m °C for a mass/occupied volume ratio of 0.064 g/cm3. It is comparable or lower than that of other natural materials discussed in the literature. The dynamic thermal simulation tool “TRNSYS” was applied to predict the thermal behavior of RW. The thickness of PTPW material was considered as variant to choose the better condition allowing achieving results very close to those of polyurethane. Obtained results highlight that 30 cm thick PTPW can reduce temperature by 1 to 2°C compared to 10 cm thick polyurethane. An improvement in the energy efficiency of the refrigerated warehouse was also highlighted. So, because of its performance, low cost, and eco-friendly nature, PTPW can compete with conventional insulating materials.

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40

ZIAD, Slimane, Imane BENOUDJAFER, and Ibtissam BENOUDJAFER. "Towards the use of natural thermal insulation on the exterior of vertical building walls in desert regions: A case study in the city of Bechar, Algeria." Journal of Thermal Engineering, August 3, 2023, 308–20. http://dx.doi.org/10.18186/thermal.1448589.

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The use of natural-based exterior thermal insulation systems constitutes a significant challenge for achieving energy efficiency of construction. The purpose of this article is to propose new exterior thermal insulation solutions based on natural materials such as wood wool, cellulose wadding, expanded cork, hemp fiber, and sheep’s wool, in order to minimize energy consumption, address durability concerns, maintain thermal comfort, and promote the use of natural materials in thermal insulation system designs. The methodology followed consists of presenting a comparative numerical study of different exterior insulation techniques (ETI) using a dynamic thermal simulator for desert regions. The study evaluated ETI systems for vertical walls attached to a concrete block wall, including one EPS system with coating (wet process) and six systems with cladding (dry process). The results show that applying exterior insulation to walls using the two cladding systems based on hemp fiber and sheep wool resulted in a total reduction in building energy consumption of 42.21% and 42.81%, respectively. These results confirm the effectiveness of natural materials in improving the energy performance of buildings, particularly the system based on sheep wool.

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41

GUNGOR, Sahin, Sinan GOCMEN, and Erdal CETKIN. "A review on battery thermal management strategies in lithium-ion and post-lithium batteries for electric vehicles." Journal of Thermal Engineering, August 8, 2017, 1071–92. http://dx.doi.org/10.18186/thermal.1334238.

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Electrification on transportation and electricity generation via renewable sources play a vital role to diminish the effects of energy usage on the environment. Transition from the conven-tional fuels to renewables for transportation and electricity generation demands the storage of electricity in great capacities with desired power densities and relatively high C-rate values. Yet, thermal and electrical characteristics vary greatly depending on the chemistry and struc-ture of battery cells. At this point, lithium-ion (Li-ion) batteries are more suitable in most applications due to their superiorities such as long lifetime, high recyclability, and capacities. However, exothermic electrochemical reactions yield temperature to increase suddenly which affects the degradation in cells, ageing, and electrochemical reaction kinetics. Therefore, strict temperature control increases battery lifetime and eliminates undesired situations such as lay-er degradation and thermal runaway. In the literature, there are many distinct battery thermal management strategies to effectively control battery cell temperatures. These strategies vary based on the geometrical form, size, capacity, and chemistry of the battery cells. Here, we focus on proposed battery thermal management strategies and current applications in the electric vehicle (EV) industry. In this review, various battery thermal management strategies are doc-umented and compared in detail with respect to geometry, thermal uniformity, coolant type and heat transfer methodology for Li-ion and post-lithium batteries.

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BULUT, Murat, and Nedim SÖZBİR. "THERMAL DESIGN, ANALYSIS AND TEST VALIDATION OF TURKSAT-3USAT SATELLITE." Journal of Thermal Engineering, February 26, 2021, 468–82. http://dx.doi.org/10.18186/thermal.887316.

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Devade, Kiran. "PARAMETRIC ANALYSIS OF THERMAL PERFORMANCE OF RANQUE-HILSCH VORTEX TUBE." Journal of Thermal Engineering, June 29, 2018, 2333–54. http://dx.doi.org/10.18186/thermal.439061.

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ALJABAIR, Sattar, Israa ALESBE, and Sahira Hasan IBRAHIM. "Review on latent thermal energy storage using phase change material." Journal of Thermal Engineering, January 31, 2023, 247–56. http://dx.doi.org/10.18186/thermal.1245298.

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One of the appealing technologies that contributes to raising the energy storage density is latent heat thermal energy storage. The heat of fusion is isothermally stored at a temperature representing the temperature at which a phase-change material transitions between phases. The current research provides a review of how phase transition materials are used in melting and solidification. Generally, the range of working temperature extends from -20 °C to 200 °C for solidification and melting applications. The first range (-20 to 5 °C) is employed for commercial and domestic refrigeration. The second range (5 to 40 °C) is utilized to lower the energy requirements for air-conditioning applications. The applications includes in third range (40 to 82 °C) are solar collector and heating of water. Applications of absorption cooling, waste electricity generations, and heat recovery are operated at high temperature range (82 to180 °C). There are various types of PCMs for all the above temperature ranges. The present review paper will discuss the application field, Geometry, PCM type, heat transfer augmentation technique and their effects on the performance. The conclusions are mentioned to give more insight about the PCM behavior in various applications.

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Rashevski, Milan, and Slavtcho Slavtchev. "Convective thermal losses of long-term underground hot water storage." Journal of Thermal Engineering, April 11, 2023, 528–40. http://dx.doi.org/10.18186/thermal.1457058.

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A case of underground long-term hot water storage is investigated numerically. The study is based on the unsteady two-dimensional Navier-Stokes equations in Boussinesq approximation applied to a closed cavern with time-dependent temperature boundary conditions on the walls. The problem formulated in a vorticity-stream function statement is solved by finite difference method (FDM) for high values of the Rayleigh number and for the Prandtl number of water. Streamlines, velocity and temperature fields are presented graphically for given moments of time. The evolution of the thermocline thickness in the mid-section of the cavern is slow and illustrates that the hot water zone occupies more than the half of the cavern even after 6 months period. The Nusselt number on the walls shows that the convective thermal losses are small and after certain period of time tend to decrease due to the diminished temperature difference at the walls. The influence of the fluid convection on the thermal losses is evaluated quantitatively, showing high seasonal thermal efficiency of the insulated hot water storage.

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PAUL, Ashish, Jintu MANI NATH, and Tusar KANTI DAS. "An investigation of the MHD Cu-Al2O3/H2O hybrid-nanofluid in a porous medium across a vertically stretching cylinder incorporating thermal stratification impact." Journal of Thermal Engineering, May 22, 2023, 799–810. http://dx.doi.org/10.18186/thermal.1300847.

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The thermal aspects of 𝐶𝑢 − 𝐴𝑙2𝑂3/𝑤𝑎𝑡𝑒𝑟 hybrid nanofluid in a porous medium across a ver-tically stretched cylinder with the incorporation of heat sink/source impact are investigated in this numerical study. A magnetic field along the transverse direction of the stretching cylinder and the thermal buoyancy effect is considered in the flow problem. A pertinent similarity vari-able has been employed to simplify the boundary layer equations which govern the flow and convert the coupled nonlinear partial differential equations into a set of non-linear ordinary differential equations. The numerical results are computed using the 3-stage Lobatto IIIa tech-nique, Bvp4c. The impacts of non- dimensional parameters, including Prandtl number, heat source/sink parameter, magnetic parameter, porosity parameter, curvature parameter, ther-mal stratification parameter, and thermal buoyancy parameter on the velocity curve, thermal curve, skin-friction coefficient, and Nusselt number, are illustrated graphically and numeri-cally portrayed in tables. The important results demonstrate that hybrid nanofluids are more thermally conductive than nanofluids. Therefore, the hybrid nanofluid has a considerable im-pact on improving thermal developments. It has been found that the absolute skin friction of the hybrid nanofluid is up to 31% higher compared to the nanofluid. The heat transport rate of the hybrid nanofluid is 7.5% enhanced in comparison to the nanofluid. The influence of heat stratification of the hybrid nanofluid flow is appreciably significant.

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ERKOL, Samet, Melih YÜCESAN, Muhammet GÜL, and Ali Fuat GÜNERI. "Investigation of issues affecting thermal comfort in water system underfloor heating applications of buildings with Bayesian networks." Journal of Thermal Engineering, July 1, 2022, 981–91. http://dx.doi.org/10.18186/thermal.1332410.

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Thermal comfort is related to the stability of the ambient temperature. Constant changes in ambient temperature appear as a situation that negatively affects comfort. The selected build-ing systems must be arranged to maintain this stability for the continuity of thermal comfort. In this study, issues affecting thermal comfort in water system underfloor heating applications of buildings are handled and analyzed using the Bayesian Network modeling methodology. Visual examples of the problems encountered in field applications are also given. Three dif-ferent scenarios are tested with the constructed Bayesian Network model. In the first scenario, assumed that mechanical project failures were prevented. In this case, it was observed that the failure rate decreased by about 5%. In the second scenario, assumed that mechanical applica-tion failures are prevented along with mechanical project failures. The failure rate decreased by 11% compared to the first situation. The third scenario assumed that the mechanical proj-ect preparation phase was concluded without any problems, the mechanical project was im-plemented without any failures, and the mechanical system was commissioned without any problems. In the last scenario, the failure rate decreased by 14% compared to the first case, and the probability of not providing thermal comfort remained at 2%. As a result of these three scenarios, the possibility of not providing thermal comfort in the underfloor heating system is detailed and interpreted.

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KHAOULA, Amri, and Alkama DJAMEL. "Evaluation of summer thermal comfort using in situ measurement and dynamic simulation, hot and arid climate in Algerian Saharan region as a case study." Journal of Thermal Engineering, January 31, 2023, 218–32. http://dx.doi.org/10.18186/thermal.1245164.

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The interest to ensure thermal comfort becomes one of the major challenges in the building sector, not only for the quality of interior ambiences, but also to minimize the energy rate consumed for heating and cooling systems. Th s paper presents the advantage of using the adaptive approach and numerical simulation to assess the level of thermal comfort of dwellings of different architectural typology in hot climate. For this purpose, the method is based on in situ measurements effected on two samples of traditional and contemporary typology; using anemometer instrument, where the climatic parameters measured inside and outside samples are: ambient temperature, relative humidity rate and air velocity. The simulation work is performed by Energy-Plus software; consequently experimental tests are realized on the local material in order to know their physical and thermal characteristics. The results obtained demonstrate the efficiency of the traditional passive devices, which are able to provide a comfortable thermal ambience without referring to the air conditioning system, with an operating temperature of 30.5ºC and a satisfaction rate of 80%.

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BATIHA, Mohammad Ahmad, Saleh RAWADİEH, Marwan BATIHA, Leema AL-MAKHADMEH, Muhammet KAYFECI, and Freabdullah MARACHLI. "Thermal insulation performance curves for exterior walls in heating and cooling seasons." Journal of Thermal Engineering, February 8, 2023, 1053–69. http://dx.doi.org/10.18186/thermal.1337469.

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Determination of thermal insulation performance (i.e. optimum insulation thickness, energy saving and payback period) is a tedious and time-consuming task that requires a thorough knowledge in thermal insulation engineering and economics. The main goal of this paper is to make the determination of insulation performance simple and timesaving by introduc-ing thermal insulation performance curves (TIPCs) from which the insulation performance can easily be found for any climate condition and all economic factors related to energy and insulation. These curves were generated based on a life-cycle cost analysis (LCCA) method. The curves can be easily read based on a single factor, called the f-factor, which comprises the number of degree-day, coefficient of performance, present worth factor, energy cost, and insu-lation cost. With the gain of heating and cooling degree days (i.e. HDD and CDD), TIPCs can be used for both heating and cooling loads. TIPCs cover commonly used insulation materials for building walls with thermal conductivities range from 0.020 to 0.055 W/m K. TIPCs were validated against published data.

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Kumar, Satyendra, and Prakash Chandra. "Experimental investigation of axial finned tube evaporator thermal distillation system using for diesel engine waste heat recovery process." Journal of Thermal Engineering, June 11, 2022, 479–89. http://dx.doi.org/10.18186/thermal.1456708.

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The study aims to improve the waste thermal energy retrieval from flue gas of an internal combustion engine (ICE). The recovered waste heat energy was used for distillation by using a thermal distillation system. The performance of the thermal distillation unit was investigated by varying the evaporator (boiler) type and engine load (25, 50, 75 %). Four different types of boilers were used including one smooth copper tube and other three were two, three and four axial finned copper tube evaporators. The impact of boiler type and engine load on the net retrieved energy and exergy, net energy and exergy efficiency, and distillate yield rate of thermal distillation unit was also examined. The results showed that the net extracted heat energy and exergy for axial finned tube evaporator was approximately 26.823 – 45.513 % and 7.614 – 25.203 W higher than that of smooth tubes evaporator at 25 and 75 % engine load, respectively. The distillation yield was found to be ~ 2.35 liter/ hour in the case of four axial finned tube boiler at 75 % engine load.

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