Browsing by Author "Awolola, Olalekan O."

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    Evaluation of Outside Air Design Dry and Wet Bulb Temperatures for Air Conditioning Systems in Nigeria
    (The Nigerian Society of Engineers, 2015-06) Olorunmaiye, John A.; Awolola, Olalekan O.
    There is increase in the ambient temperature being experienced around the world due to global warming and this has caused the energy consumption of cooling systems to increase. Statistical analysis was carried out on meteorological data obtained from Nigerian Meteorological Agency for 18 towns in Nigeria for 1994 - 2008 or 1995 - 2009. The weather variables considered in this study were hourly relative humidity and dry bulb temperature, three hourly wet bulb temperature and vapour pressure. The averages of dry bulb temperature, wet bulb temperature and vapour pressure were computed. The four warmest months were determined for each location, from which the outdoor 1 %, 2.5 %, and 5 % design conditions of dry bulb temperature, wet bulb temperature and vapour pressure were computed using Normal Distribution tables for each town. The design month is the month with the highest average maximum temperature. The following design months were obtained from the results: February is the design month for Benin City, Calabar, Ibadan, Ondo, Owerri and Port Harcourt; March for Abuja, Enugu, Ikeja, Ilorin, Jos and Minna, April for Bauchi, Kaduna, Kano, Maiduguri, Sokoto and Yola. The 21/2 % outside design dry bulb and wet bulb temperatures obtained for 1951 - 1965 by earlier workers were compared with those obtained for 1994 - 2009 in this work. The percentage differences obtained were 13 - 25 % for dry bulb design temperature and from 2 - 40 % for wet bulb temperature. It was concluded that climate change has caused outside design conditions for air conditioning systems to change and results obtained in this work should be used to replace the design conditions formerly used by engineers which were obtained from earlier periods. This work is useful in preparing a revised code of practice for comfort air conditioning system design for Nigeria.
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    Study of Energy Consumption for Optimum Poultry Yield in Nigeria: Nefraday Farm Ltd Ilorin as a Case Study
    (The Nigerian Society of Engineers, 2013-06) Olorunmaiye, John A.; Awolola, Olalekan O.
    The work reported in this paper involves studying the energy consumption for optimizing poultry yield in Nigeria using NEFRADAY farm as case study. The energy consumption of the hatchery section of the farm alongside the environmental temperatures for a period of thirty (30) days were measured. The temperature data were analyzed to determine the heating degree day for the period and this was related to the energy consumption for each day. The linear regression obtained between energy consumption (EH in kWh) and the heating degree-day (DH in degree Celsius-day) was: EH = 4.448DH. This equation was applied for estimating energy consumption for all the months of the year using available calculated degree-days for Ilorin. It was concluded that February is the period that is most suitable for hatchery business in Ilorin since the energy consumption is lowest for that month.