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MUTLU, MUSTAFA

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MUTLU

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MUSTAFA

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    Publication
    Particle concentration comparison of radiator and floor heating systems under zero air change rate condition
    (Taiwan Assoc Aerosol Res-taar, 2021-11-01) Mutlu, Mustafa; MUTLU, MUSTAFA; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Meslek Yüksekokulu/İklimlendirme ve Soğutma Teknolojisi Programı; 0000-0001-6816-8377; AAA-2005-2022
    As a result of isolating doors and windows very well to reduce heating energy costs, some environments' air change rate becomes zero. 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. 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. 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.
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    Publication
    Numerical investigation of an air cleaning device performance
    (Gazi Üniversitesi, 2022-01-01) Kılıç, Muhsin; Mutlu, Mustafa; Saldamlı, İsmail Hakkı; KILIÇ, MUHSİN; MUTLU, MUSTAFA; Saldamlı, İsmail Hakkı; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; Bursa Uludağ Üniversitesi/Yenişehir Meslek Yüksekokulu; 0000-0003-2113-4510; 0000-0001-6816-8377; O-2253-2015; AAA-2005-2022; DRD-6981-2022
    In this study, the performance of a portable air cleaner, which is used to clean the air of a room with a person sitting in it, was investigated. The effects of different blowing angles and flow rates from the air supply vent on the device cleaning performance were investigated. In this context, air age and clean air delivery rate (CADR) parameters were calculated numerically. Randomly distributed particles in the room were tracked using the discrete phase model (DPM) and the relationship of pollutant concentrations with CADR and air age was examined. It has been seen that the blowing angle is an important parameter along with the flow rate. Moreover, it was concluded that the air age approach can be used to determine the performance of air cleaning devices. It has been found that the air cleaning device capture more than half of the particles in the environment, while the remaining particles are captured by other room surfaces.
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    Publication
    Numerical simulation and analytical evaluation of the collection efficiency of the particles in a gas by the wire-plate electrostatic precipitators
    (MDPI, 2022-07-01) Kılıç, Muhsin; Mutlu, Mustafa; Altun, Ayşe Fidan; KILIÇ, MUHSİN; MUTLU, MUSTAFA; ALTUN, AYŞE FİDAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; Bursa Uludağ Üniversitesi/Orhangazi Yeniköy Asil Çelik Meslek Yüksekokulu; 0000-0003-2113-4510; 0000-0001-7236-8398; 0000-0001-6816-8377; O-2253-2015; ABB-9566-2020; AAA-2005-2022
    In this study, a numerical simulation model and an analytical method are introduced to evaluate the particle collection efficiency and transport phenomena in an electrostatic precipitator (ESP). Several complicated physical processes are involved in an ESP, including the turbulent flow, the ionization of gas by corona discharge, particles' movement, and the displacement of electric charge. The attachment of ions charges suspended particles in the gas media. Then, charged particles in the fluid move towards the collection plate and stick on it. The numerical model comprises the gas flow, electrostatic field, and particle motions. The collection efficiency of the wire-plate type ESP is investigated for the particle diameter range of 0.02 to 10 mu m. It is observed that electric field strengths and current densities show considerable variation in the solution domain. Meanwhile, changing supply voltage and charging wire diameters significantly affect the acquired charges on the electrostatic field and particle collecting efficiencies. Simultaneously, the distance between the charging and collecting electrodes and the main fluid inlet velocity has an important effect on the particle collection efficiency. The influence of the different ESP working conditions and particle dimensions on the performance of ESP are investigated and discussed.