مرتضی ادیب کیا

This paper has investigated a simulation and numerical study of the flow field and temperature distribution in a room with inorganic insulation with a floor heating system. The air in the room is considered incompressible, and the modeling turbulent flow and radiation heat transfer are modeled by disturbance k-ε (RNG) and DO radiation models, respectively. Piso algorithm is used for solving the governing equations. The results indicate that the best position for insulation in the floor heating system is in the external walls of the building. It has been found that paint with ceramic coatings can lead to 18% savings in energy consumption in the winter than the conventional paint. Also, the impact of external wall insulation with floor heating system in different climates has been investigated. It has also been found that hot and humid, hot and dry and humid temperate climates provide better thermal comfort conditions for the residents and that the lowest energy consumption is related to the hot and humid climate.

Limitations of energy resources and the essence of energy saving necessitate the use of the suitable paint to prevent energy waste in various buildings and industries. Ceramic insulations are of particular importance due to high thermal resistance, low absorption coefficient, and easy operation and implementation, caused by existed micro-particles in their compositions. In this study, a three-dimensional chamber is considered with real dimensions and boundary conditions are varied. Using Boussinesq approximation and due to the low Reynolds number, modeling and simulation were done using k-ε turbulence model (LRN), Do radiation model and Piso algorithm. Methods such as LCA technique, Exergoeconomic calculations, and exergy rate are also used for economic calculations and exergoenvironmntal factor is used for environmental impacts. The results indicate that exergoeconomic factor varies in the range of 45% to 85% and average exergy ratio of about 1.5 kw and the efficiency value of 90% are noticed. Finally, it is shown that the use of ceramic microparticles in the external wall of buildings saves energy up to 18%.