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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v38.i2.40
pages 144-152

Air-Conditioning Cooling Load and Petrol-Ethanol Mixtures in Engines Impact on Global Climate Change

J. A. Olorunmaiye
Department of Mechanical Engineering, University of Ilorin, Ilorin, Nigeria
D. O. Ariyo
Department of Mechanical Engineering, University of Ilorin Ilorin, Nigeria
A. D. Ogunshola
Department of Mechanical Engineering, Ladoke Akintola University of Technology, Ogbomosho, Nigeria
K. R. Ajao
Department of Mechanical Engineering, University of Ilorin, Ilorin, Nigeria

RESUMO

The climate is one of the factors on which the energy required to cool a building depends. Hourly dry-bulb temperature and relative humidity data for fifteen years (1978 − 1992) were obtained for Ilorin and Ikeja. From statistical analysis of the data, it was found that the mean dry bulb temperature and the 1, 2.5 and 5 % design dry-bulb temperature used for air-conditioning cooling load calculation were higher than the corresponding values published in 1974 from statistical analysis of weather data for the fifteen year period of 1951−1965. This shows that more energy will be required for cooling buildings if the trend of global warming continues. One way to reduce global warming is by using bio-fuels. A four stroke spark-ignition engine was run on pure gasoline, 5 % ethanol to 95% gasoline, 10 % ethanol to 90 % gasoline, 15 % ethanol to 85 % gasoline and 20 % ethanol to 80 % gasoline. When the engine ran on pure gasoline, it developed a maximum torque of 10.7 Nm, a brake power of 3141.6 W and a brake thermal efficiency of 25.91 %. Each of these performance parameters reduced as the percentage of ethanol increased. For the 20 % ethanol to 80 % gasoline blend the corresponding values of the performance parameters obtained were 10.2 Nm, 2827.44 W and 21.75 %. Even though the performance of the engine declined as the percentage of ethanol increased, the emission of less green house gases is enough motivation to use bio-fuels.


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