Heat loss reduction using ceramic micro-particles in paint of the inner walls of a room with radiation cooling panel
Subject Areas : environmental managementGhanbar Ali Sheikhzadeh 1 , Ali Akbar Azemati 2 , Armin Saraei 3
1 - - PhD, Department of Mechanical Engineering, Faculty of Engineering, University of Kashan
2 - PhD Student, Department of Mechanical Engineering, Faculty of Engineering, University of Kashan
3 - 3- Bachelor Student, Department of Mechanical Engineering, Faculty of Engineering, University of Science and Technology, Iran.
Keywords: Ceramic micro-particles, Reducing energy consumption, Radiation cooling, Environment,
Abstract :
Introduction and Aim Limited resources and the need for energy conservation have made the use of energy loss preventive thermal insulations, like the paints containing micro mineral particles, an economic option in different industries and buildings. The aim of the current study is to investigate the effect of modern insulation, such as paints with ceramic micro-particle in internal walls of a room with radiative cooling panels, on energy consumption. Method In the present study, to investigate the flow field and temperature distribution in a room with a wall of radiation cooling, a three-dimensional cavity has been simulated with different boundary conditions. The effect of coating with a paint containing ceramic micro-particles, ordinary acrylic paints and no paint in different states of changing the boundary conditions, such as changes in wall temperature and absorption coefficient on a room with wall cooling radiation has been studied and the results were compared. Findings Using the computer code, the interior surface temperature is obtained for different boundary conditions and used as a boundary condition for simulation. In case of using wall radiative cooling panels, room temperature is in the comfort zone in all cases, and the lowest temperature occurs when using paints with ceramic micro-particles in the interior surfaces of the room. Discussion It was observed that the coating containing ceramic micro-particles acted as a thermal insulation and reduced energy consumption by about 22% .
- A. Synnefa, M. Santamouris , H. Akbari, 2007, Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions, Energy and Buildings, Vol. 39, pp. 1167–1174.
- D. Kolokotsa, P. Maravelaki-Kalaitzaki, S. Papantoniou, E. Vangeloglou,M. Saliari, T. Karlessi, M. Santamouris, 2012, Development and analysis of mineral based coatings for buildings and urban structures, Solar Energy, Vol. 86, pp. 1648–1659.
- Y. C. Lee, 2008, Results of insulated demo projects in China, China National Center, China.
- D. J. Hei, M. Hei, 2009, Thermal imaging testing on interiors showing energy savings when using Insuladd test, VIE. Inc, USA.
- S. Hui, T. Hongwei, T. Athanasios, 2011, The effect of reflective coatings on building surface temperatures, indoor environment and energy consumption—An experimental study, China, Energy and Buildings, Vol. 43, pp. 573–580.
- L. Wang, Y. Wang, X. G. Sun, J. Q. He, Z. Y. Pan, Y. Zhou, P.L. Wu, 2011, Influence of pores on the thermal insulation behavior of thermal barrier coatings prepared by atmospheric plasma spray, China, Materials and Design,Vol. 32, pp 36–47.
- A. Synnefa, M. Santamouris, I. Livada, 2006, A study of the thermal performance of reflective coating for the urban environment, Greece, Solar Energy, Vol. 80, pp. 968–981.
- X. Q. Cao, R. Vassenb, D. Stoever, 2004, Ceramic materials for thermal barrier coatings, Germany, Journal of the European Ceramic Society, Vol. 24, pp. 1–10.
- S. Ozkan, I. Yasar, C. Erdal, 2005, Finite element modeling of the effect of the ceramic coatings on heat transfer characteristics in thermal barrier applications, Turkey, Materials and Design, Vol. 26, pp. 357–362.
- T. Paul, 2004, Study of ceramic microsphere insulation with a consideration of the wider implications, UK.
- علی اکبر عظمتی، عباس سالمی تجرد، حسین حسینی، بهزاد شیرکوند هداوند، مدلسازی عایقکنندههای معدنی موجود در رنگهای ساختمانی جهت بهینهسازی انرژی، مجموعه مقالات چهارمین کنفرانس بینالمللی گرمایش، سرمایش و تهویه مطبوع، خرداد 1391، هتل المپیک، تهران، ایران.
- E. Allen, J. Iano, Fundamentals of Building Construction Materials and Methods, 278 5th ed., Wiley, 2008.
- امیررضا صابونچی، شبیهسازی عددی میدان جریان وانتقال حرارت در یک اتاق با سرمایش تشعشعی، پایاننامه کارشناسی ارشد مهندسی مکانیک، دانشگاه کاشان، 1388.
- Suryavanshia, A.K., Swamy, R. N., 2002, Development of lightweight mixes using ceramic microspheres as fillers, Cement and Concrete Research, Vol.32, pp .1783–1789.
- مهدی معرفت، سید علیرضا ذوالفقاری، امیر امیدوار، طراحی مناسب نما و پوسته خارجی ساختمان، روشی موثر برای جلوگیری از رخداد میعان در سیستمهای سرمایش تابشی سقفی، نشریه انرژی ایران، مرداد 1385، سال دهم، شماره26.
- حسین خراسانی زاده، قنبرعلی شیخ زاده، امیررضا صابونچی، هادی بت شکن، "مطالعه و مقایسه اثر پانلهای سرمایش تابشی سقفی و دیواری بر توزیع دما، سرعت و انتقال حرارت در یک اتاق مسکونی"، مهندسی مکانیک مدرس، سال 13، شماره 9، ص ص 149-160، آذر 92.
- K. Hoffman, S. T. Chiang, 1993, Computational Fluid Dynamics for Engineers, Engineering Education System.
- Anderson, 1995, Computational Fluid Dynamics: the Basics with Applications.
- M. Rahimi, A. Sabernaeemi, 2011, Experimental study of radiation and free convection in an enclosurewith under-floor heating system, Energy Conversion and Management, Vol 52, PP.2752–2757.