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Cathode cooling degree influences electron emmision and deposited rare earth atoms transferring behaviours in tungsten-based arcing process. Experimental study was carried out with three different types of tungsten-based cathodes (lanthanized, thoriated and yttriated) in no cooling mode and water cooling mode, respectively. Compared with no cooling mode, the height of high temperature cathode region...
Waste printed circuit boards (WPCBs) contain abundant metals. Recovering WPCBs is significant in energy conservation, sustainable development, and environmental protection, which save the energy and environment cost of searching and melting of metals. Many reports were related to environment-friendly disposal of basal boards of WPCBs. Little information was reported about the recovery technology of...
A reference scheme of a multiple energy complementation system is of great importance of Chongming's energy system development. In this paper, four feasible scenarios which are distinguished by energy supply forms have been discussed based on RETScreen software. Economic analysis as well as the renewable sources penetration was taken into account. The outcome of equipment size optimization of each...
In this paper, a novel model is proposed for predicting thermo-physical properties of superheated steam (SHS) in SHS injection wells and for estimating wellbore heat efficiency.Firstly, a novel mathematical model is proposed for predicting pressure, temperature as well as superheat degree in SHS injection wells. Secondly, the direct and indirect methods are introduced to estimate the wellbore heat...
This study describes the development of solid oxide fuel cell (SOFC) stack with external manifold structure. The stack used anode supported cells with size of 11 cm × 11 cm which are fabricated by tape casting, screen-printing and co-sintering. Computer simulation was employed to evaluate the gas distribution in the external manifold stack. The 10-cell stack was operated at 750 °C with hydrogen as...
Liquid desiccant dehumidification is an energy-efficient approach for humid air handling process. Increasing attention has been paid to heat pump driven liquid desiccant (HPLD) systems in China. The current research focuses on a counter-flow HPLD system. The configuration of this HPLD system is introduced and theoretical models of key components are analyzed. Based on the simulation model, operating...
Failure of a component in BCHP (building cooling, heating and power) system may result in failure of a sub-system or of the whole system. The reliability and availability analysis of BCHP system is helpful to the designer to decide the redundancy in case of equipment failure. This paper presents the redundant design of BCHP system and its operation mode. The SSM (state-space method) combined to the...
The composition and manufacturing process of a three-layer anticorrosive cool coating for oil storage tanks are introduced. The optical, indoor thermal and physicochemical properties were systematically investigated. In addition, the outdoor cooling effect and the reduction of evaporation losses of crude oil were predicted. The coating developed has high solar reflectance and thermal emittance and...
Several distributed triple-generation (DTG) system options to produce cooling, heating and power have been evaluated and compared in a multi-criteria method, such as technical, economic, environmental and social aspects. Due to the fuzzy or uncertain evaluation criteria, this paper presents an improved grey incidence evaluation method for DTG systems. This method adopts the combination of the improved...
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