[{“box”:0,”content”:”[if 992 equals=”Open Access”]
Open Access
n
[/if 992]n
n
n
n
n
- n t
n
K. Pavan Kumar Reddy, B. Nageswara Rao, J. Pavanu Sai
[/foreach]
n
n
n[if 2099 not_equal=”Yes”]n
- [foreach 286] [if 1175 not_equal=””]n t
- Research Scholar, Professor, Associate Professor, Department of Mechanical Engineering, Vignan’s Foundation for Science, Technology &Research Deemed to be University, Vadlamudi, Department of Mechanical Engineering, Vignan’s Foundation for Science, Technology &Research Deemed to be University, Vadlamudi, Srinivasa Institute of Engineering and Technology, Cheyyeru (V), Amalapuram, Andhra Pradesh, Andhra Pradesh, Andhra Pradesh, India, India, India
n[/if 1175][/foreach]
[/if 2099][if 2099 equals=”Yes”][/if 2099]nn
Abstract
nIn this research article, different phase change materials are incorporated inside the slabs to reduce the heat transfer from the roof. Experiments are conducted during summer season March 2021 to the time lag decrement factor and heat flux to that of results are compared with RCC slab to that of Green material I (CaCl26H2O) and Green Roof with Green material II (48%CaCl2+4.3%NaCl+0.4%KCl+47.3%H2O). On comparison Green Slab II is having better thermal performance over the other PCM materials incorporated in building slabs. The time lag and decrement factor are found to be 4 and 0.485 for Green roof II which is better than the other slabs. The percentage of error is found to be 0-5% for experimental and Analytical comparison for each slab which is a good sign for its thermal behavior. On average the temperature inside the slab is in between 2oC to 8oC for Green Roof II which is a good sign over the other slabs used for comparison. The heat flux is also reduced to 65% to 70% for the month of March 2021 by using Green Roof II. The novelty of this research work is to reduce the heat entering inside the building during summer season for Anantapur region by incorporating PCM materials inside the slabs as it is the second highest temperature receiving area in India. Unsteady state heat transfer calculations are also done for comparison of different slabs at this location.
n
Keywords: PCM efficiency, Application of Cooling, Phase Change materials, Melting temperature, PCM in budlings.
n[if 424 equals=”Regular Issue”][This article belongs to Journal of Polymer and Composites(jopc)]
n
n
n
n
n
n
n[if 992 equals=”Open Access”] Full Text PDF Download[/if 992] nn
n[if 379 not_equal=””]nBrowse Figures
n
n[/if 379]n
References
n[if 1104 equals=””]n
- Xling Jin , Mario A. Medina , Xiaosong Zhang On the importance of the location of PCMs in building walls for enhanced thermal performance , Applied Energy 106 (2013) 72-78p.
- Agyenim F, Hewitt N, Eames P, et A review of materials, heat transfer and phase change problem formulation for latent heat thermal energy storage systems (LHTESSs). Renew Sust Energy Rev 14 (2010) 615–28p.
- Zhou D, Zhao CY, Tian Y. Review on thermal energy storage with phase change materials (PCMs) in building applications. Appl Energy 92 (2012) 593–605p.
- Kosny J, Yarbrough D, Miller W, et al. Thermal performance of PCM-enhanced building envelope systems. Thermal performance of the exterior envelopes of whole buildings X international conference, Clearwater, FL, USA, 2007.
- Sá AV, Azenha M, de Sousa H, et al. Thermal enhancement of plastering mortars with phase change materials: experimental and numerical approach. Energy Build 2012; 49:16–27p.
- Izquierdo-Barrientos MA, Belmonte JF, Rodríguez-Sánchez D, et al. A numerical study of external building walls containing phase change materials (PCMs). Appl Therm Eng 2012; 47:73–85p.
- Kuznik F, Virgone J, Johannes K. In-situ study of thermal comfort enhancement in a renovated building equipped with phase change material wallboard. Renew Energy 2011; 36:1458–62p.
- Bontemps A, Ahmad M, Johannès K, et al. Experimental and modelling study of twin cells with latent heat storage walls. Energy Build 2011; 43:2456–61p.
- Evers AC, Medina MA, Fang Y. Evaluation of the thermal performance of frame walls enhanced with paraffin and hydrated salt phase change materials using a dynamic wall simulator. Build Environ 2010; 45:1762–8p.
- Zhou G, Yang Y, Wang X, et al. Thermal characteristics of shape-stabilized phase change material wallboard with periodical outside temperature waves. Appl Energy 2010; 87:2666–72p.
- Kuznik F, Virgone J. Experimental assessment of a phase change material for wall building use. Appl Energy 2009; 86:2038–46p.
- Alawadhi EM. Thermal analysis of a building brick containing phase change material. Energy Build 2008; 40:351–7p.
- Medina MA, King JB, Zhang M. On the heat transfer rate reduction of structural insulated panels outfitted with phase-change materials. Energy 2008; 33:667–78p.
- Darkwa K, O’Callaghan PW, Tetlow D. Phase-change drywalls in a passive-solar building. Appl Energy 2006; 83:425–35p.
- Huang MJ, Eames PC, Hewitt NJ. The application of a validated numerical model to predict the energy conservation potential of using phase change materials in the fabric of a building. Sol Energy Mater Sol Cells 2006; 90:1951–60p.
- Schossig P, Henning HM, Gschwander S, et al. Micro-encapsulated phase-change materials integrated into construction materials. Sol Energy Mater Sol Cells 2005; 89:297–306p.
- Xiao W, Wang X, Zhang YP. Analytical optimization of interior PCM for energy storage in a light weight passive solar room. Appl Energy 2009; 86:2013–8p.
- Borreguero AM, Sánchez ML, Valverde JL, et al. Thermal testing and numerical simulation of gypsum wallboards incorporated with different PCMs content. Appl Energy 2011;88:930–7p.
- Castell A, Martorell I, Medrano M, et al. Experimental study of using PCM in brick constructive solutions for passive cooling. Energy Build 2010; 42:534–40p.
- Zhang M, Medina MA, King JB. Development of a thermally enhanced frame wall with phase-change materials for on-peak air conditioning demand reduction and energy savings in residential buildings. Int J Energy Res 2005;29(9):795–809p.
- Fang Y. A comprehensive study of phase change materials (PCMs) for building wall applications. Ph.D. dissertation. University of Kansas; 2009.
- Vijaya Kumar, K. Hemachandra Reddy. Simulation of a phase change material encapsule building roof for cooling application. The technology world a quarterly international journal, Malaysia. Oct/Nov 2009 Vol-V, Issue-I, Pages: 285-291.
- ASHRAE, “American Society of Heating, Refrigerating and air-conditioning engineers.” Chapter 30 Fenestration, Atlanta, 2001,GA.
nn[/if 1104][if 1104 not_equal=””]n
- [foreach 1102]n t
- [if 1106 equals=””], [/if 1106][if 1106 not_equal=””],[/if 1106]
n[/foreach]
n[/if 1104]
nn
nn[if 1114 equals=”Yes”]n
n[/if 1114]
n
n
n
| Volume | ||
| [if 424 equals=”Regular Issue”]Issue[/if 424][if 424 equals=”Special Issue”]Special Issue[/if 424] [if 424 equals=”Conference”][/if 424] | ||
| Received | January 21, 2024 | |
| Accepted | February 6, 2024 | |
| Published | April 30, 2024 |
n
n
n
n
n
nn function myFunction2() {n var x = document.getElementById(“browsefigure”);n if (x.style.display === “block”) {n x.style.display = “none”;n }n else { x.style.display = “Block”; }n }n document.querySelector(“.prevBtn”).addEventListener(“click”, () => {n changeSlides(-1);n });n document.querySelector(“.nextBtn”).addEventListener(“click”, () => {n changeSlides(1);n });n var slideIndex = 1;n showSlides(slideIndex);n function changeSlides(n) {n showSlides((slideIndex += n));n }n function currentSlide(n) {n showSlides((slideIndex = n));n }n function showSlides(n) {n var i;n var slides = document.getElementsByClassName(“Slide”);n var dots = document.getElementsByClassName(“Navdot”);n if (n > slides.length) { slideIndex = 1; }n if (n (item.style.display = “none”));n Array.from(dots).forEach(n item => (item.className = item.className.replace(” selected”, “”))n );n slides[slideIndex – 1].style.display = “block”;n dots[slideIndex – 1].className += ” selected”;n }n”}]