Yazar "Yesilata, Bulent" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Investigation of the Efficiency of Photovoltaic Thermal (PV/T) Hybrid Collector as Solution for Water Desalination Needs of Rural Areas in Niger
    (Bursa Teknik Üniversitesi, 2024) Garba, Mariama Alı; Yesilata, Bulent
    The efficiency of SS (single slope) solar still integrated with Photovoltaic-thermal collector (PVT) is investigated underneath Niamey’s climatic weather condition. Thus, a theoretical study is conducted, and MATLAB software is used to simulate the equations and data of climatic condition in Niamey. Three different months have been used for the computations. The electrical efficiency and thermal power of PVT structure, along with the temperatures of water and glass cover are determined. Also, the daily freshwater yield and overall thermal efficiency of the system are calculated. As result, maximum electrical and thermal efficiencies of this structure at noon are found to be 14% and 58.09% respectively. The maximum temperature of water is recorded to be 60? while that of glass cover is reported to 51.4?. The highest freshwater production rate is observed to be 1.10 kg/m2 per hour at noon time, and the daily freshwater yield is 2.62 kg/m.
  • Küçük Resim Yok
    Öğe
    Photovoltaic-Thermoelectric Power for Sustainable Cold Chains Needed for Covid-19 Vaccine Delivery and Use in Niger
    (Bursa Technical University, 2023) Adam, Aichatou Galy; Yesilata, Bulent
    In areas where the access to an off-grid electricity is not possible or not reliable, the transport and conservation of vaccine and medicines is not possible. Nevertheless, these areas need and have right to access medicine. This need is much more critical nowadays since preservation of COVID-19 vaccines require cold-chain at some level of degree. Solar energy can be used to power the refrigerator destined to keep the medicines and vaccines cool. Even tough stand-alone photovoltaic (PV) is already used to power these coolers, our work shows that the use of a Photovoltaic-Thermoelectric hybrid generators could allow a great improvement of the autonomy. The output power of the PV alone and the hybrid are investigated under Niger meteorological conditions. These two systems coupled with a medical cooler are investigated. The results show that the hybrid system produces considerably more power to be stored in the battery, indicating much longer autonomy. Under the same conditions, when the PV reached its lowest efficiency of 12.24% , the hybrid was at his efficiency peak 19.62%. Thus, a rise of 5.88% was achieved. Our work presented here is important for giving a message to the international organizations that sustainable cold chains needed for equitable COVID-19 vaccine distribution is clearly possible with solar PV/TE driven DC refrigerators.