Title: Energy use efficiency of on-farm- and post-pineapples production in Nigeria

Authors: S.O. Jekayinfa; S.O. Afolayan; A. Taiwo; J.O. Popoola

Addresses: Department of Agricultural Engineering, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria ' National Horticultural Research Institute (NIHORT), PMB 5432, Idi-Ishin, Ibadan, Nigeria ' Department of Agricultural Engineering, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria ' National Horticultural Research Institute (NIHORT), PMB 5432, Idi-Ishin, Ibadan, Nigeria

Abstract: The energy use and energy use efficiency in a group of pineapples plantations of a research institute in Nigeria was estimated. Total energy expenditure was 6,117.81 MJha⁻¹ and energy output was 21,760 MJ/ha. The output/input energy ratio was 3.56. The different categories of energy input estimated are: direct energy (51.21%), indirect energy (48.79%), renewable energy (14.08%) and non-renewable energy (85.92%). Mean pineapples yield was about 8,000 kg ha⁻¹. The net energy and energy productivity value was 15,642.69 MJha⁻¹ and 1.13 kg MJ⁻¹, respectively. The total cost of production of pineapples and benefit-cost ratio was $4,050/ha and 1.70 respectively. Estimation of energy from pineapples peelings showed that 1 kg of pineapples peelings can replace between 17.71 and 17.92 MJ for heat generation by combustion of biogas and between 11.72 and 17.53 MJ for replacing electricity generation from the national grid, diesel generating set or gasoline generating set.

Keywords: energy efficiency; energy contribution; pineapples; pineapple residue; Nigeria; pineapple peelings; heat generation; biogas; electricity generation.

DOI: 10.1504/IJETP.2013.058148

International Journal of Energy Technology and Policy, 2013 Vol.9 No.2, pp.175 - 190

Received: 21 Aug 2013
Accepted: 15 Sep 2013
Published online: 21 Jun 2014 *

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