Dynamic Thermal Performance and Economic Optimization of Building Walls with Phase Change Material

Authors

  • Muwafaq Shyaa Alwan * College of Engineering, Al-iraqia University, Baghdad, Iraq
  • Humam Kareem Jalghaf Department of Fluid and Heat Engineering, University of Miskolc, 3515 Miskolc, Hungary, Department of Mechanical Engineering, University of Technology-Iraq, 10066 Baghdad, Iraq
  • Endre Kovács Institute of Physics and Electrical Engineering, University of Miskolc, 3515 Miskolc, Hungary

DOI:

https://doi.org/10.58564/IJSER.3.3.2024.226

Keywords:

Transient Heat Transfer, Phase Change Materials, Heat Storage, Effective Heat Capacity model, optimisation based on savings

Abstract

This study presents a comprehensive analysis of transient heat transfer in sustainable building walls, focusing on optimising the thickness of the phase change material (PCM) to enhance the thermal performance of building walls. The investigation employs advanced numerical simulation techniques to get accurate and efficient analysis. We applied Dirichlet boundary conditions on both sides of the wall for one full year while considering the heat transfer by convection and radiation to represent the realistic boundary with a range of PCM thickness. The research aims to identify the optimal thickness that offers the most efficient thermal regulation within the enclosed space. The study findings are presented in terms of yearly energy load, yearly energy storage, yearly energy cost, yearly cost saving, net life saving, and energy saving percentage. The optimal case combinations were selected based on higher energy-saving percentages and higher net cost-life savings. In brick-based solutions, the optimal combination achieved an energy-saving percentage of 71.861%, corresponding to net cost-life savings of 164.896 USD/m2. Similarly, for concrete-based solutions, the optimal combination resulted in an energy-saving percentage of 87.545%, corresponding to net cost-life savings of 571.066 USD/m2. The results offer valuable insights into designing environmentally sustainable building walls with improved thermal performance, emphasising the strategic integration of the PCM for optimal energy efficiency.

References

Z. Liu, J. Hou, D. Wei, X. Meng, and B. J. Dewancker, "Thermal performance analysis of lightweight building walls in different directions integrated with phase change materials (PCM)," Case Stud. Therm. Eng., vol. 40, p. 102536, Dec. 2022, doi: 10.1016/J.CSITE.2022.102536.

Y. Cascone, A. Capozzoli, and M. Perino, "Optimisation analysis of PCM-enhanced opaque building envelope components for the energy retrofitting of office buildings in Mediterranean climates," Appl. Energy, vol. 211, pp. 929–953, Feb. 2018, doi: 10.1016/J.APENERGY.2017.11.081.

R. F. Jam, M. Gholizadeh, M. Deymi-Dashtebayaz, and E. Tayyeban, "Determining the optimal location and thickness of phase change materials in the building walls: an energy-economic analysis," J. Brazilian Soc. Mech. Sci. Eng., vol. 45, no. 10, p. 554, 2023, doi: 10.1007/s40430-023-04472-8.

M. J. Abden, Z. Tao, M. A. Alim, Z. Pan, L. George, and R. Wuhrer, "Combined use of phase change material and thermal insulation to improve energy efficiency of residential buildings," J. Energy Storage, vol. 56, p. 105880, Dec. 2022, doi: 10.1016/J.EST.2022.105880.

Z. Zhang, N. Zhang, Y. Yuan, P. E. Phelan, and S. Attia, "Thermal performance of a dynamic insulation-phase change material system and its application in multilayer hollow walls," J. Energy Storage, vol. 62, p. 106912, Jun. 2023, doi: 10.1016/J.EST.2023.106912.

E. Iffa, D. Hun, M. Salonvaara, S. Shrestha, and M. Lapsa, "Performance evaluation of a dynamic wall integrated with active insulation and thermal energy storage systems," J. Energy Storage, vol. 46, p. 103815, Feb. 2022, doi: 10.1016/J.EST.2021.103815.

H. K. Jalghaf and E. Kovács, "Simulation of phase change materials in building walls using effective heat capacity model by recent numerical methods," J. Energy Storage, vol. 83, p. 110669, Apr. 2024, doi: 10.1016/J.EST.2024.110669.

Á. Nagy, I. Omle, H. Kareem, E. Kovács, I. F. Barna, and G. Bognar, "Stable, Explicit, Leapfrog-Hopscotch Algorithms for the Diffusion Equation," Computation, vol. 9, no. 8, p. 92, 2021.

H. K. Jalghaf, E. Kovács, and B. Bolló, "Comparison of Old and New Stable Explicit Methods for Heat Conduction, Convection, and Radiation in an Insulated Wall with Thermal Bridging," Buildings, vol. 12, no. 9, pp. 1–26, 2022, doi: 10.3390/buildings12091365.

https://www.global-climatescope.org/markets/iq/

"PCM prices." https://www.alibaba.com/product-detail/RoHS-Recognized-High-stickiness-surface phase_62454411018.html?spm=a2700.galleryofferlist.normal_offer.d_title.154e298d7htPaU

"Glass wool prices." https://www.alibaba.com/product-detail/Glass-Wool-Insulation-Heat-Insulation-Roofing_1600546047784.html?spm=a2700.7735675.0.0.1725YBnDYBnDAD&s=p

A. D. Solomon, "An easily computable solution to a two-phase Stefan problem," Sol. Energy, vol. 23, no. 6, pp. 525–528, Jan. 1979, doi: 10.1016/0038-092X(79)90077-X.

J. A. Palyvos, "A survey of wind convection coefficient correlations for building envelope energy systems' modeling," Appl. Therm. Eng., vol. 28, no. 8–9, pp. 801–808, 2008, doi: 10.1016/j.applthermaleng.2007.12.005.

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Published

2024-09-01

How to Cite

Shyaa Alwan, M., Kareem Jalghaf, H., & Kovács, E. (2024). Dynamic Thermal Performance and Economic Optimization of Building Walls with Phase Change Material. Al-Iraqia Journal for Scientific Engineering Research, 3(3), 80–93. https://doi.org/10.58564/IJSER.3.3.2024.226

Issue

Vol. 3 No. 3 (2024)

Section

Articles

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Copyright (c) 2024 Muwafaq Shyaa Alwan, Humam Kareem Jalghaf, Endre Kovács

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