Electronic Engineering

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Browsing Electronic Engineering by Author "Mtunzi, B."

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    Centralised Incubator Control System
    (2016-01-27) Mtunzi, B.; Chamisa, M.; Madumbu, Z.; Gonye, N. R.; Nhenga-Mugarisanwa, F.
    This paper presents an infant incubator system that protects and helps incubate a premature infant while in hospital. The device is economical, robust, and uses easily replaceable parts. It consists of a control mechanism that makes use of fans, a humidifier and a home heater rod to provide heat. The temperature and humidity were automatically controlled and maintained by a microcontroller. The incubator had a base designed to automatically weigh and log the infant’s weight. A Visual Studio interface was used to provide incubator chamber data and to evaluate the performance of the design. The system could weigh the weight of the infant as well as control the chamber temperature at 36.5°C and humidity at 40%. The system was able to maintain these conditions within a period of 5 seconds
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    Thermal and electrical energy yield analysis of a directly water cooled photovoltaic module.
    (Thermal Science, 2016) Mtunzi, B.; Meyer, E.L.; Michael, S.
    Electrical energy of photovoltaic modules drops by 0.5% for each degree increase in temperature. Direct water cooling of photovoltaic modules was found to give improved electrical and thermal yield. A prototype was put in place to analyse the field data for a period of a year. The results showed an initial high performance ratio and electrical power output. The monthly energy saving efficiency of the directly water cooled module was found to be approximately 61%. The solar utilisation of the naturally cooled photovoltaic module was found to be 8.79% and for the directly water cooled module its solar utilisation was 47.93%. Implementation of such systems on households may reduce the load from the utility company, bring about huge savings on electricity bills and help in reducing carbon emissions.