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Experimental analysis of ACP on photovoltaics as free convection for increasing output power

Sofijan Armin, Suprapto Bhakti Yudho, Nawawi Zainuddin

Przegląd Elektrotechniczny

2022

R. 98, nr 5

121--125

This experiment uses perforated ACP as a cooling medium mounted on the back of a 100 Wp polycrystalline type photovoltaic panel, ACP with a hole diameter of 10 mm as passive cooling, which functions to reduce the temperature of the photovoltaic panel which has increased due to an increase in temperature. Radiation and excess heat from the Sun from 09.00 am to 15.00 pm, which is the peak of solar heat in subtropical areas such as Indonesia. The decrease in the temperature of the PV panels installed using the ACP cooler with a maximum of 9.13C due to the free convection process will cause an increase in the maximum output power of the PV panel of 11.15 W.

W tym eksperymencie zastosowano perforowany ACP jako czynnik chłodzący zamontowany z tyłu panelu fotowoltaicznego typu polikrystalicznego o mocy 100 Wp, ACP o średnicy otworu 10 mm jako chłodzenie pasywne, którego zadaniem jest obniżenie temperatury panelu fotowoltaicznego, która wzrosła ze względu na wzrost temperatury. Promieniowanie i nadmiar ciepła ze Słońca od 09:00 do 15:00, co jest szczytem ciepła słonecznego w obszarach podzwrotnikowych, takich jak Indonezja. Spadek temperatury paneli fotowoltaicznych zainstalowanych przy użyciu chłodnicy ACP o maksymalnie 9,13C w wyniku procesu konwekcji swobodnej spowoduje wzrost maksymalnej mocy wyjściowej panelu fotowoltaicznego o 11,15 W.

Efficacy of Dissolved Ozone against Staphylococcus aureus and Bacillus cereus Microorganism

Fitria Syarifa, Sidik Muhammad Abu Bakar, Buntat Zolkafle, Nawawi Zainuddin, Jambak Muhammad Irfan, Kamarudin Nur Nabilah, Musa Fatin Nabilah

Journal of Ecological Engineering

2019

Vol. 20, nr 11

76--81

Ozone is a robust antimicrobial agent with numerous potential applications in the industry. Ozone, in either gaseous or aqueous phases is effective against the majority of microorganisms. Relatively low concentrations of ozone and short contact time are sufficient to inactivate bacteria and microorganism. This project investigated the efficacy of dissolved ozone against food-related microorganism. The ozone system was evaluated using the microbial effects on Staphylococcus aureus, and Bacillus cereus and its clinical efficacy against ORP level for disinfection was determined. The results showed that 100% of S. aureus and B. cereus were eliminated by the dissolved ozone in tap water. In conclusion, the dissolved ozone has great efficacy, lower cost and shorter disinfection cycle. Thus, this low temperature, ozone-based disinfection is a green technique and is regarded as one of the most promising disinfection methods.