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Techno-economic analysis of a biogas driven poly-generation system for postharvest loss reduction in a Sub-Saharan African rural community

Lookup NU author(s): Rasaq Lamidi, Dr Long Jiang, Dr Yaodong WangORCiD, Dr Pankaj Pathare, Professor Tony Roskilly



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier Ltd, 2019.

For re-use rights please refer to the publisher's terms and conditions.


© 2019 Elsevier Ltd. Sub-Saharan African region currently suffers from the lack of clean energy and heavy postharvest loss. Hence, a biogas driven combined cooling, heating and power generation system that harmonises power generation with food drying and cold storage is studied in the context of current renewable energy policies of the Nigerian government. Wastes from a community cattle market are assessed for biogas generation that is subsequently used to power a 72 kW internal combustion engine. Heat is recovered from the engine to drive a cabinet dryer, an absorption chiller and maintain anaerobic digestion process. The model is developed in Aspen Plus and the results are used to evaluate the economic viability of the system. The electricity and tri-generation efficiencies are 25.7% and 74.5%, respectively. Results also suggest that energy demand of 407 farmers can be met including drying of 12,190 kg of cassava, 3,985 kg of maize and cold-storage of 6,080 kg of tomato per farmer every year. At $0.05·kWh−1 of electricity, the discounted payback period varies between 2.5 and 4.7 years depending on agricultural product processed. Levelised cost of energy and profitability index are also sensitive to both interest rate and plant's availability which become uneconomical above 9% and below 80%, respectively.

Publication metadata

Author(s): Lamidi RO, Jiang L, Wang YD, Pathare PB, Roskilly AP

Publication type: Article

Publication status: Published

Journal: Energy Conversion and Management

Year: 2019

Volume: 196

Pages: 591-604

Print publication date: 15/09/2019

Online publication date: 21/06/2019

Acceptance date: 12/06/2019

Date deposited: 03/07/2019

ISSN (print): 0196-8904

ISSN (electronic): 1879-2227

Publisher: Elsevier Ltd


DOI: 10.1016/j.enconman.2019.06.023


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