Hybrid heating systems optimization of residential environment to have thermal comfort conditions by numerical simulation

Journal of Environmental Health Science Engineering

Masoud Mirzaei¹  Ali Keshavarz¹  Nabi Jahantigh² 

[1]Mechanical Engineering Department, K. N. Toosi University of Technology, Tehran, Iran

[2]Mechanical Engineering Department, University of Zabol, Zabol, Iran

关键词: Conventional heating;    Optimal conditions;    Radiant panels;    Thermal comfort;    Virtual manikin;   

Others  :  1216877
DOI  :  10.1186/s40201-015-0202-2

 received in 2013-05-29, accepted in 2015-05-11,  发布年份 2015

【 摘 要 】

The aim of this study is to determine optimum hybrid heating systems parameters, such as temperature, surface area of a radiant heater and vent area to have thermal comfort conditions. DOE, Factorial design method is used to determine the optimum values for input parameters. A 3D model of a virtual standing thermal manikin with real dimensions is considered in this study. Continuity, momentum, energy, species equations for turbulent flow and physiological equation for thermal comfort are numerically solved to study heat, moisture and flow field. K − ɛRNG Model is used for turbulence modeling and DO method is used for radiation effects. Numerical results have a good agreement with the experimental data reported in the literature. The effect of various combinations of inlet parameters on thermal comfort is considered. According to Pareto graph, some of these combinations that have significant effect on the thermal comfort require no more energy can be used as useful tools. A better symmetrical velocity distribution around the manikin is also presented in the hybrid system.

【 授权许可】

   
2015 Jahantigh et al.

【 图 表 】

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

Fig. 7.

Fig. 8.

Fig. 9.

Fig. 10.

Fig. 11.

Fig. 12.

【 参考文献 】

• [1]Bemani M., “Modern air conditioning practice”, 3rd ed., ISBN-964-8142-31-9, Ketab Iran Publication.
• [2]Orosa JA. Research on general thermal comfort models. Eur J Sci Res. 2009; 27(2):217-27.
• [3]Van Hoof J, Hansen JLM. Quantifying the relevance of adaptive thermal comfort models in moderate thermal climate zones. Build Environ. 2007; 42:156-70.
• [4]Prek M. Thermodynamic analysis of human heat and mass transfer and their impact on thermal comfort. Int J Heat Mass Transfer. 2005; 48:731-739.
• [5]Jeet S, Chapman K.S., Keshavarz A. “Window performance for human thermal comfort”. 4765(RP )1126.
• [6]Myhern JA, Holmberg S. Flow: “Pattern and thermal comfort in a room with panel floor and wall heating”. Energy and Building. 2008; 40:524-526.
• [7]Muarkumi S, Zeng J, Hayashi T. “CFD analysis of wind environment around a human body”. J Wind Eng Ind Aero. 1999; 83:393-408.
• [8]Kilic M, Sevilgen G. “Modeling airflow, heat transfer and moisture transport around a standing human body by computational fluid dynamics”. Int Communication in Heat and Mass transfer. 2008; 35:1159-1164.
• [9]White FM. “Viscous Fluid Flow”, 2nd ed. omide enghelab publication, c2006.
• [10]Batchelor GK. “An Introduction to Fluid Dynamics”. Cambridge Univ. Press, Cambridge, England; 1967.
• [11]Wyon DP, Fanger PO, Olesen BW, Pedersen CJK. “The mental performance of subjects clothed for comfort at two different air temperatures”. Ergonomics. 1975; 18:358-374.
• [12]Montgomery C. “Design and analysis of experiments”. Douglas - 5th ed. ISBN 0-471-31649-0.
• [13]Jiju A. “Design of Experiments for Engineers and Scientists”, ISBN: 0750647094 Publisher: Elsevier Science & Technology Books, Pub. Date: October; 2003.
• [14]Barth TJ, Jespersen D. “The design and application of upwind schemes on unstructured meshes”. Technical Report. AIAA −89-0366. AIAA 27th Aerospace Sciences Meeting, Reno, Nevada; 1989.
• [15]ASHRAE. Hand Book-Fundamental Refrigeration and Air-Conditioning Engineers, Atlanta: American Society of Heating; 2001 (chapter 8).
• [16]Kilic M, Sevilgen G. Numerical analysis of air flow, heat transfer, moisture transport and thermal comfort in a room heated by two-panel radiators. Energy and Buildings. 2011; 43:137-146.