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Browsing by UP Author "Zhang, Lijun"
Now showing items 1-20 of 32
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Kunatsa, Tawanda; Zhang, Lijun; Xia, Xiaohua (Taylor and Francis, 2022)Modelling and optimisation of biogas production from different substrate mixtures is lagging behind in research and development. Current biogas production processes are not fully exploiting co-digestion of multifaceted ...
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Zhang, Lijun; Zhuan, Xiangtao T. (IEEE / Institute of Electrical and Electronics Engineers Incorporated, 2013-12)Incorporated with a receding horizon control (RHC) approach, a penalty method is proposed to reduce energy wasted by braking in a heavy haul train’s operation. The train’s practical nonlinear model is linearized to ...
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Masaki, Mukalo Sandro; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2017-12)Among the various types of belt conveyors, the multi-drive technology has gained worldwide popularity in recent years because of the cost saving opportunities as a result of the possible reduction of the belt weight. Until ...
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Barzegar, Farshad; Momodu, Damilola Y.; Zhang, Lijun; Xia, Xiaohua; Manyala, Ncholu I. (Elsevier, 2017-12)Energy storage systems (ESSs) of electric vehicles (EVs) require high energy density and high power density concurrently. The ESSs with only supercapacitors (SCs) or high performance batteries (hpBs) have egregious ...
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Masaki, Mukalo Sandro; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2018-11)Energy efficiency of belt conveyors has recently gained in importance worldwide. While significant research efforts were consecrated to the operational aspects, the literature study shows the design optimization problem ...
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Zhang, Lijun; Zhuan, Xiangtao T. (Institute of Electrical and Electronics Engineers, 2015-06)An operation control approach for heavy haul trains to optimize their performance, including operation safety, service quality and energy consumption, is proposed. Following a model predictive control method, the ...
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Zhang, Lijun; Xia, Xiaohua; Zhu, Bing (Institute of Electrical and Electronics Engineers, 2017-11)A dual closed-loop control system is developed for a dense medium coal washing process. The controller is designed to improve the separation efficiency and energy efficiency of the dense medium cyclone coal beneficiation ...
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Mei, Jun; Xia, Xiaohua; Zhang, Lijun (International Federation of Automatic Control, 2019)A temperature and humidity controller is designed for a direct expansion air conditioning (DX A/C) system making use of a state feedback decoupling approach of nonlinear control systems. It is shown that the nonlinear ...
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Gildenhuys, Tiaan; Zhang, Lijun; Ye, Xianming (Elsevier, 2017-12)The aim of this study is to address this problem by formulating a constrained multi-objective optimization model which simultaneously minimizes the operational cost and environmental impact of a multi-microgrid system.
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Lin, Dong; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2020-08)In this paper, a hierarchical control strategy for Venlo-type greenhouse climate control under South Africa climate is proposed to improve energy efficiency and reduce operating cost. The proposed hierarchical control ...
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Kagiri, Charles; Zhang, Lijun; Xia, Xiaohua (MDPI Publishing, 2019-06-06)Compressed natural gas stations serve customers who have chosen compressed natural gas powered vehicles as an alternative to diesel and petrol based ones, for cost or environmental reasons. The interaction between the ...
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Masaki, Mukalo Sandro; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2018-07)A two-layer power flow control for a grid-tied photovoltaic plant equipped with battery-supercapacitor energy storage system is presented in this paper. The proposed strategy aims at simultaneously handling the intermittent ...
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Masaki, Mukalo Sandro; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2019-05)This paper presents a two-layer control strategy designed for easy integration of supercapacitors in a grid-integrated solar photovoltaic-battery hybrid renewable system, initially controlled by a typical model predictive ...
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Improving energy efficiency of cyclone circuits in coal beneficiation plants by pump-storage systems Zhang, Lijun; Xia, Xiaohua; Zhang, Jiangfeng (Elsevier, 2014-04)A pump storage system (PSS) is introduced to the coal preparation dense medium cyclone (DMC) plants to improve their energy efficiency while maintaining the required medium supply. The DMC processes are very energy ...
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Zhang, Lijun; Xia, Xiaohua; Zhang, Jiangfeng (Institute of Electrical and Electronics Engineers, 2015-05)The dense medium cyclone (DMC) process used in coal beneficiation plants is studied from a control system perspective. Employing the dynamic model of the DMC process derived from mass flow balance, a model based control ...
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Wanjiru, Evan M.; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2016-10)The management of energy-water nexus in buildings is increasingly gaining attention among domestic end-users. In developing countries, potable water supply is unreliable due to increasing demand, forcing end-users to ...
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Ye, Xianming; Xia, Xiaohua; Zhang, Lijun; Zhu, Bing (Elsevier, 2015-04)The energy savings achieved by implementing energy efficiency (EE) lighting retrofit projects are sometimes not sustainable and vanish rapidly given that lamp population decays as time goes by if without proper maintenance ...
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Nyamayoka, Lumbumba Taty-Etienne; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2017-12)This paper attempts to propose an optimal power management for grid connected to a piezoelectric energy harvesting with a storage system to supply street lights and traffic signals. The system includes piezoelectric energy ...
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Goddard, Rohan; Zhang, Lijun; Xia, Xiaohua (Elsevier, 2019-02)When sizing distributed hybrid renewable energy systems (HRESs) it has been found that capital costs can significantly be reduced when socio-demographic factors are considered. Unique electricity usage patterns have ...
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Njepu, Ambrose O.; Zhang; Xia, Xiaohua (Elsevier, 2019-02)Energy and water insecurities are global challenges, especially in arid and semi-arid regions. This paper proposes an optimal energy-water nexus management approach in residences using alternative energy and water resources, ...
Now showing items 1-20 of 32