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In this work, we will seek to model and optimize the energy efficiency of the distillation column of petroleum fractions, especially the gasoline stabilization column to get a better use of energy, increased yield and reduced costs of operation. The calculation of the stabilization column was performed by using Soave-Redlich-Kong (SRK) thermodynamic model, with the help of CHEMSEP software. A technical...
Energy consumption has taken more and more attention in process industries to enhance their competitiveness in the world. An effective analysis method will be very helpful to provide the direction of energy saving for a plant. Exergy analysis method was introduced into energy intensity¨Cproduct ratio analysis model (e-p analysis model), and exergy intensity-energy intensity-product ratio analysis...
The solution of accumulating and keeping the heat in the walls is through insulating from the outside, a common method used in Europe although it hadn't been confirmed on the physical basis, in regards with the conditions of continental climate, may it be in winter or in summer. In effect, during summer season part of the heat gets inside despite the insulations in the walls and over the night the...
To reduce the energy consumption of evaporation process in alumina refinery, thermal and exergy analysis were applied to the four-effect evaporators and three-stage flashes evaporation system. Result indicates that the thermal efficiency of the evaporation system is only 15.22%. The thermal efficiencies of all links are high except that of the evaporator of effect IV, which is only 6.91%. The heat...
The universal black box analysis model of oil depot equipment and grey box analysis model of total system are set up by applying three-box model theory of thermodynamics. On the basis of energy consumption analysis models and energy balance equations, the relevant energy consumption criteria are put forward. In accordance with production parameters of a certain oil depot in Daqing Oilfield, the evaluation...
The small log home architecture is being welcomed greatly by the market for their special architecture style and ecotypes healthiness. Confront with the energy crisis becoming more seriously, how to deal with the relationship between energy consuming in construction and in use of this kind of architecture is the key of having the continual development vitality. Through the mechanism analysis of the...
The preheat time of central air-conditioning system preheating space is not only affect the comfort of environment, but also affect energy consumption. A preheat time model is established based on the thermodynamics principle, and an optimum stat-up algorithm of central air-conditioning system is proposed based on the NN (neural network), the simulation result shows that this method can predict the...
Thermodynamics energy analysis method of computational complexity is proposed. It is a kind of simple method to calculate the lower bound of problem's complexity. Some thermodynamics concepts are used to calculate the problem's lower bound of energy consumption especially entropy concept. According to the physics theory energy consumption and computational complexity are direct ratio. The computational...
Long-term planning models are useful to describe future energy and technology options and to analyze environmental issues. They propose solutions for meeting future energy consumption. Focusing on the electricity sector, we argue that in order to provide a more relevant assessment of the power supply system ahead we need to tackle both flexibility needs and network reliability. On the one hand, flexibility...
Energy analysis method of computational complexity is proposed. Entropy and quantum superposition theory are used to calculate the problem??s lower bound of energy consumption. Energy consumption and computational complexity are direct ratio. The computational complexity is decided only by initial state and final state of problem. The algorithm??s details are needless in this method. Energy analysis...
Due to the complexity of thermodynamic system and variability of boundary condition, the striking non-linear relationship exists between the operating parameters and the energy consumption. At present, the research of quantitatively analyzing the problem under systematic variable work conditions is lack of effective method. Based on deep research on the problem, the concept of sensitive factors of...
Due to the complexity of thermodynamic system and variability of boundary condition, the striking non-linear relationship exits between the operating parameters and the energy consumption. At present, the research of quantitatively analyzing the problem under systematic variable work conditions is lack of effective method. Based on deep research on the problem, the concept of sensitive factors of...
With increasing sophistication of products, there is a general trend towards higher purity (lower tolerances) in materials and parts. The purification of input materials and the need to create low-entropy environments in manufacturing lead to significant energy and materials use - referred to as secondary materialization. In this article we explore secondary materialization in semiconductor manufacturing...
Modeling and control of an indoor climate using a floor heating system based on a heat pump is discussed. The thermodynamic models of the heat pump, room, floor and circulated water are theoretically developed and then identified through experimental data. Several control strategies, namely relay control, P control, PID control and PID control with pre-filtering of reference input, are developed and...
Carbon dioxide (CO2) is the largest contributor among greenhouse gases (GHGs) in terms of emissions. Capturing CO2 from industrial gas stream by aqueous alkanolamine solution is the most cost-effective technology available today. Monoethanolamine (MEA) has been commonly used in gas processing industry for decades. In recent years, a sterically hindered amine, 2-amino-2-methyl-1-propanol (AMP), has...
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