Iranian Society of Heating, Refrigerating, and Air Conditioning Engineers (IRSHRAE) Journal of Renewable and New Energy 2423-4931 4 1 2017 06 22 Utilizing of personalized heating systems; an effective approach forachievement of thermal comfort and energy saving Utilizing of personalized heating systems; an effective approach forachievement of thermal comfort and energy saving 27 33 50861 FA Omid Deymi Department of Mechanical Engineering, University of Birjand, Birjand, Iran Alireza Zolfaghari Department of Mechanical Engineering, University of Birjand, Birjand, Iran 0000-0001-9917-3400 Majid Malek-Jafarian Department of Mechanical Engineering, University of Birjand, Birjand, Iran Journal Article 2017 10 10 In the present study, the energy consumption of a personalized heating system has been evaluatedwith considering of thermal comfort conditions in a sample room and also compared with non-personalized heating system. The mentioned room has dimensions as 4×3×2.7 m3 and it includes a table, a chair, approximate model of a human body, a return air opening and four air inlet diffusers for personalized ventilation system. For solving the governing equations, OpenFOAM numerical solver has been utilized. Results indicate that non-personalized heating system can provide more uniform distribution in Predicted Mean Vote (PMV) index compared with personalized heating system. Nevertheless, the local thermal discomfort index due to draught is within the permissiblerange (less than %20) for personalized heating system. Also, the energy consumption of personalized heating system has been reported much less than non-personalized heating system, therefore the energy saving of personalized system is about 70 to 85 percent. In personalized heating mode, desired conditions of thermal comfort and minimum energy consumption obtained at the velocity of 1m/s and temperature of 34.5 °C among the investigated cases. <br />  In the present study, the energy consumption of a personalized heating system has been evaluatedwith considering of thermal comfort conditions in a sample room and also compared with non-personalized heating system. The mentioned room has dimensions as 4×3×2.7 m3 and it includes a table, a chair, approximate model of a human body, a return air opening and four air inlet diffusers for personalized ventilation system. For solving the governing equations, OpenFOAM numerical solver has been utilized. Results indicate that non-personalized heating system can provide more uniform distribution in Predicted Mean Vote (PMV) index compared with personalized heating system. Nevertheless, the local thermal discomfort index due to draught is within the permissiblerange (less than %20) for personalized heating system. Also, the energy consumption of personalized heating system has been reported much less than non-personalized heating system, therefore the energy saving of personalized system is about 70 to 85 percent. In personalized heating mode, desired conditions of thermal comfort and minimum energy consumption obtained at the velocity of 1m/s and temperature of 34.5 °C among the investigated cases. <br />  https://www.jrenew.ir/article_50861_38263b1bf2eae961299270e20d9b12fb.pdf