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Browsing School of Engineering and Technology (JA) by Issue Date

Browsing School of Engineering and Technology (JA) by Issue Date

Now showing items 1-20 of 87

Hammer mill throughputs and power requirements while grinding maize and wheat

Nyaanga, D. M.; Maina, G. G.; Wambua, Raphael M. (2007)
Influence of Brining on the Drying Parameters of Tilapia (Oreochromis Niloticus) in a Glass-Covered Solar Tunnel Dryer

Kituu, Gareth M.; Shitanda, D.; Kanali, C. L.; Mailutha, J. T.; Njoroge, C. K.; Wainaina, J. K.; Ondote, P. M. O. (International Commission of Agricultural and Biosystems Engineering, 2009)

The objective of this study was to determine the effect of brining on the drying rate of tilapia (Oreochromis niloticus) in a glass-covered solar tunnel dryer. Tilapia fish, eviscerated, and split into pieces of approximately ...
Effects of ground insulation and greenhouse microenvironment on the rate and quality of biogas production

Cheruiyot, P. K.; Ngunjiri, G. M.; Ndiema, C. K.; Chemelil, M. C.; Wambua, Raphael M. (UNESCO, 2009)

A study was conducted at Egerton University, Njoro, Kenya to establish the potential of plastic digester to produce biogas under natural and greenhouse microenvironment. The specific objectives were to evaluate the effects ...
Quantifying land cover and land use change by remote sensing and GIS techniques in River Njoro catchment, Kenya

Kundu, P. M.; China, S. S.; Wambua, Raphael M. (2009)
Drying characteristics and some quality attributes of Rastrineobola argentea (Omena) and Stolephorus delicatulus (Kimarawali)

Kituu, Gareth M.; Oduor-Odote, P. M.; Shitanda, D.; Obiero, M. (Rural Outreach Program, 2010)

Rastrineobola argentea common name Omena and Stolephorus delicatulus common name Kimarawali are fishes that live in the freshwater and marine waters, respectively. Both are small in size, move in schools and are landed in ...
A Simulation Model for Solar Energy Harnessing By the Tunnel Section of a Solar Tunnel Dryer

Kituu, Gareth M.; Shitanda, D.; Kanali, C. L.; Mailutha, J. T.; Njoroge, C. K.; Wainaina, J. K.; Bongyereire, J. S. (International Commission of Agricultural and Biosystems Engineering, 2010-01)

Models were developed to predict global solar radiation and the energy harnessed by a solar tunnel dryer, and simulated in Visual Basic 6. In addition, the simulated data were compared with actual data. Using a 10% absolute ...
Thin layer drying model for simulating the drying of Tilapia fish (Oreochromis niloticus) in a solar tunnel dryer

Kituu, Gareth M.; Shitanda, D.; Kanali, C. L.; Mailutha, J. T.; Njoroge, C. K.; Wainaina, J. K.; Silayod, V. K. (Elsevier, 2010-06)

Mathematical models for predicting the plenum chamber temperatures developed by a solar tunnel dryer and the drying of Tilapia fish (Oreochromis niloticus) in the solar tunnel dryer was developed, and simulated in Visual ...
Artificial breeding of an optimized solar tunnel dryer using genetic algorithms

Kituu, Gareth M.; Shitanda, Douglas; Kanali, Chris; Mailutha, Joseph; Wainaina, John (Taylor & Francis, 2012)

Studies were carried out to artificially breed an optimized solar tunnel dryer using genetic algorithms (GAs). The energy harnessed by the dryer was simulated in Visual Basic Script (Microsoft Visual Basic Script 2010TM) ...
Distributed slack bus model for a wind-based distributed generation using combined participation factors

Musau, Peter M.; Odero, Nicodemus A. (2012-10)

With the increased penetration of distributed generation into the power distribution system, the traditional load flow analysis that assumes a single slack bus has become impractical. The existing literature focuses on ...
Reducing real and reactive power losses in the power distribution system by DFIG placement and sizing using ordinary PSO and HGAPSO: A comparison

Musau, Peter M.; Odero, Nicodemus A.; Mbuthia, Mwangi (2012-11)

Due to the increased importance of DFIGs in optimization of real and reactive power losses and the maintenance of voltage profile, the general methods of DG placement and sizing in the existing literature cannot be of ...
Solving the active distribution network reconfiguration (ADNR) problem taking into consideration a stochastic wind scenario and load uncertainty by using HBFDE method

Musau, Peter M.; Odero, Nicodemus A. (2013-07)

Past literature has attempted to solve the problem of network reconfiguration with Distributed Generators (DGs) without taking into consideration the intermittent renewable at a close proximity. Distribution Network ...
Power loss reduction in the active distribution network by doubly fed induction generator (DFIG) placement and sizing using ordinary particle swarm optimization (PSO) and an hybrid of genetic algorithm (GA) and PSO (HGAPSO)

Musau, Peter M.; Odero, Nicodemus A.; Mbuthia, Mwangi (2013-07)

Due to the increased importance of DFIGs in optimization of real and reactive power losses and the maintenance of voltage profile, the general methods of DG placement and sizing in the existing literature cannot be of ...
Drop-weight impact damage of three-dimensional angle-interlock woven composites

Sun, B; Zhang, R; Zhang, Q; Rotich, Gideon K.; Gu, B (SAGE Publications, 2013-08-01)

The drop-weight impact behavior of three-dimensional angle-interlock woven glass fiber/unsaturated polyester resin composites was investigated with a drop-weight impact tester (Instron Dynatup 9250 impact tester). A unit ...
Simulation of Saturation Efficiency and Cooling Capacity of an Unloaded Near Infrared Reflecting Charcoal Cooler for On-farm Storage of Mango fruits

Kituu, Gareth M.; Korir, Meshack K.; Mutwiwa, Urbanus; Sila, Daniel N. (2014)

Mango (Mangifera indica L.) fruit is a valuable fruit in Kenya due to its nutritive value and economic importance. However, at least 40 to 45% of mango fruit is lost during postharvest handling primarily due to inadequate ...
Drought forecasting using indices and artificial neural networks for upper Tana river basin, Kenya-a review concept

Wambua, Raphael M.; Mutua, Benedict M.; Raude, James M. (Peertechz Publications Private Limited, 2014)

Due to increased impact of drought on water availability at different scales there is need to understand droughts especially in upper Tana River basin which is a critical and largest water system in Kenya. There is need ...
Characterizations of basalt unsaturated polyester laminates under static three‐point bending and low‐velocity impact loadings

Rotich, Gideon K.; Hu, Hangjun; Wambua, Paul; Gu, Bohong (Wiley, 2014-01-21)

This paper reports the responses of basalt unsaturated polyester laminates under static three‐point bending loading and low‐velocity impact. Three kinds of composite materials, unidirectional (0°), cross‐ply (0°/90°) and ...
Structural effects of three-dimensional angle-interlock woven composite undergoing bending cyclic loading

Jin, LiMin; Yao, Yao; Yu, YiMin; Rotich, Gideon K.; Sun, BaoZhong; Gu, BoHong (Springer Verlag, 2014-03)

This paper reports the structural effects of three-dimensional (3-D) angle-interlock woven composite (3DAWC) undergoing three-point bending cyclic loading from experimental and finite element analysis (FEA) approaches. In ...
Effects of temperature and strain rate on impact compression behaviors of three-dimensional carbon fiber/epoxy braided composites

Zhang, Wei; Zhongxiang, Pan; Rotich, Gideon K.; Gu, Bohong; Sun, Baozhong (SAGE Publications, 2014-03-06)

This paper reports compression properties of three-dimensional carbon fiber/epoxy braided composites at temperatures from 23℃ to 210℃ under strain rate from 1200 s−1 to 2400 s−1. It was found that the elevated temperature ...
Evaluation of drip irrigation and greenhouse systems in production of tomatoes in arid and semiarid lands, Kenya

Wambua, Raphael M.; Mutua, Benedict M. (2014-06)

An evaluation of on-farm performance of drip irrigation system within a greenhouse in arid and semi-arid lands (ASALs) environment was conducted. Field experiment was conducted at South Eastern Kenya University, Kenya. ...
Numerical modeling of the mechanical response of basalt plain woven composites under high strain rate compression

Zhang, Fa; Wu, Liwei; Wan, Yumin; Rotich, Gideon K.; Gu, Bohong; Sun, Baozhong (SAGE Publications, 2014-06-01)

The compression behaviors of 2D plain woven basalt/vinyl ester resin composites along the thickness direction under high strain rates have been investigated experimentally and by use of finite element analyses. The compression ...

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