Browsing by Author "Asante, David"

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    The design of solar chimney power plant for sustainable power generation
    (2014-07-30) Asante, David
    The solar chimney power plant (SCPP) also known as ‘solar updraft tower’ is a nonconcentrating solar thermal technology, which employs both solar and wind energy to operate. The plant essentially consists of three basic parts; a large greenhouse collector, which surrounds a tall chimney and a wind turbine geared to a generator at the base of the chimney. The collector converts solar radiation into thermal energy by means of greenhouse effect to heat the air beneath; subsequently the heated air is converted into kinetic energy in the chimney to drive the wind turbine to produce power. The mathematical model as a tool was used to analysis the design and performance of the SCPP for electrical power production in Takoradi city. Based on the model, mathematical equations were obtained for the solar radiation collection, useful energy, and the electrical power output by using the wind turbine. The model was then used to estimate for the power output of a 25 m diameter size collector and 50 m tall chimney, and obtained an output of 48 kW. Based on the result obtained, it was observed that, the output power is effectively dependent on the solar irradiance, chimney height and collector diameter and that the power output could be enhanced when the setup is built on a large scale in an area where there is abundance of solar radiation.
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    Risk Management in Pharmaceutical Supply Chain in Ghana
    (2008-08-25) Asante, David
    The study examines Risk Management in Pharmaceutical supply chain in Ghana. The main methodology involved a descriptive survey. Managers or pharmacist of ten manufacturing companies, managers or pharmacist of fifteen importing companies, managers or .pharmacist of thirty wholesaling companies and twenty- five managers of retail shops formed the sample population. Non-probability sampling was used to select pharmaceutical companies. The total responses used for the study was eighty which represented 94.1%. » The chi square statistic and percentages were used to analyze the data and alpha level was set at a significant level of 0.05. The questionnaires were tested for consistency (i.e. reliability) with the aid of the Statistical Package for Social Sciences (SPSS) programme. A reliability coefficient, Cronbach's Alpha, of 0.80 was obtained for the 21 statements relating to supply chain risk management. The study revealed that Pharmaceutical companies in Ghana are able to identify their risks whenever they occur and that they employs risk management methods to solve a confronting risk, but lack sound security systems to reduce or better still to prevent cash and information leakage, theft and expiration of drugs. It was also concluded that pharmaceutical companies enjoys credit facilities from their major suppliers as well as they also give credit facilities to their major customers. Moreover, they do not thoroughly investigate the credit worthiness of customers before offering credit facility. The study recommends among other things, that Pharmaceutical companies in Ghana should adopt a good and appropriate accounting and inventory management in addition to practicing an efficient debtor administration.