[1] Moi Univ, Dept Mfg Ind & Text Engn, Sch Engn, POB 3900-30100, Eldoret, Kenya
[2] Mekelle Univ, Dept Ind Engn, POB 231, Mekele, Ethiopia
[3] Egerton Univ, Fac Agr, Dept Anim Sci, POB 536-20115, Nakuru, Kenya
[4] Malawi Univ Sci & Technol, Dept Appl Studies, POB 5196, Limbe, Malawi
[5] Moi Univ, Sch Engn, Dept Mech Prod & Energy Engn, POB 3900-30100, Eldoret, Kenya
[6] Zambia Elect Supply Corp Ltd ZESCO, Dept Renewable Energy, POB 33304-10101, Lusaka, Zambia
[7] Dept Fibre Polymer & Mat Engn, POB AC939, Bulawayo, Zimbabwe
[8] Busitema Univ, Fac Engn, Dept Polymer Ind & Text Engn, POB 236, Tororo, Uganda