![]() In heating periods, different heating systems can be used to heat residential buildings. These two heating systems has their own specific velocity and temperature profiles in the room as well as particle motion characteristics. ![]() Therefore, the air velocity in the heated environment is a crucial parameter regarding particle concentration and every heating system causes a specific air movement in the room. Air velocity characteristics in a room significantly affect airborne particle concentration as particles whose diameter is between 5–10 µm move under air movements' influence (Owen et al., 1992). Understanding pollutant concentration distribution in the living environment is one of the primary objective of indoor air quality evaluation and exposure levels. Limit concentration values of particles that smaller than 10 µm and 2.5 µm diameter for short term exposure is 50 µg m –3 and 25 µg m –3, respectively, according to World Health Organization (2006). Particularly, airborne particulate matter (PM) poses a severe health risk. There has been a long-standing interest in indoor air quality in living areas (offices, houses, fitness halls, etc.) regarding public health when it is considered that people spend most of their time in enclosed areas because of modifications to their lifestyle. Keywords: Indoor air, Particle distribution, Radiator heating, Floor heating, Zero air change It was concluded that special care should be taken not to have a source of pollutants close to the ground surface in the environments where a floor heating system is used. 3D dimensional CFD simulations show that the floor heating system performs better in removing the pollutants dispersed homogeneously in the room, while the radiator system is more effective in removing the pollutants emitted from a source close to the floor. Two different heating systems (radiator and floor heating systems) widely used in residential applications were compared for a room where the air change rate is zero, using numerical methods in terms of particle concentrations. Radiator heating system has better performance when a particle source exists.Īs a result of isolating doors and windows very well to reduce heating energy costs, some environments' air change rate becomes zero.Particles in a room with a floor heating system are removed faster.Heating systems form particle concentration in a room.Particle Concentration Comparison of Radiator and Floor Heating Systems under Zero Air Change Rate Condition.
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