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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...
A 2.0L nature aspirate gasoline engine was modified to port fuel injection (PFI) hydrogen internal combustion engine (HICE) and a series dynamometer tests were carried out. The in-cylinder combustion process was analyzed, the performance, thermal efficiency and emissions of HICE with various mixture eqivalence ratios was summarized. The experimental results showed: While 20~25% lower torque compared...
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...
A quasi-dimensional spark ignition (SI) engine cycle model is used to predict the combustion and exhaust emissions of a gas engine driven generator for the cases of using biogas and liquefied petroleum gas (LPG)-biogas blends. Two different thermodynamic regions consisting of unburned gases and burned gases that are separated by the flame front are considered. Liquefied petroleum gas (0%, 5% and 15%)...
Considered the effect of temperature on the main bearing, the temperature distributions of journal, bearing and lubricant were calculated, and the thermo hydrodynamic performances of the main bearing were analyzed by solving generalized Reynolds equation, energy equation and solid heat conduction equation, etc. The results show that the bearing has obvious effect on the temperature of lubricating...
The kinetics and thermodynamics characteristics of Pb(II) and Cu(II) adsorption onto fly ash of a oil shale-fired power plant was investigated by using batch adsorption method. The results showed that Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process, while Freundlich equation is more applicable. The mechanistic steps of the adsorption process was studied through...
The oil displacement mechanism in steam injection obtained from the indoor simulation experiments is analyzed, namely some thermal-hydraulic-mechanics-chemical coupling relation in oil reservoir porous media. The phenomenological equation for transfer process of multi-field coupling deduced from the non-equilibrium thermodynamics is simple in form and rich in connotation. The driving force of oil...
The kinetics and thermodynamics characteristics of Cd(II) and Zn(II) adsorption onto fly ash of a oil shale-fired power plant was investigated by using batch adsorption method. The results showed that Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process, while Freundlich equation is more applicable. The mechanistic steps of the adsorption process was studied through...
Intake and exhaust systems are significant components of an internal combustion engine. The design and operational variables of intake and exhaust systems are decisive to determine overall engine performance. The best engine overall performance can be obtained by proper design of the engine intake and exhaust systems. The effects of intake pipe length, intake valve timing, exhaust pipe length and...
The effect of temperature on adsorption of reactive blue 19 (RB19) by cross-linked chitosan/oil palm ash composite beads was investigated. Temperature studied from range 30 to 50??C. It was observed that the uptake of this dye increased with increasing in temperature. Results revealed that sorptions of reactive blue 19 (RB19) on cross-linked chitosan/oil palm ash composite beads was endotermic in...
According to the low efficiency of the organic heat transfer material heater, this paper studies the heat transfer process under temperature difference in the organic heat transfer material heater with the finite time thermodynamics, derives the calculation formula and characteristic parameter x to determine the minimum temperature difference with the minimum exergy loss. Based on this, this paper...
The localized heating produced by a tightly focused infrared laser leads to surface tension gradients at the interface of microfluidic drops, resulting in a net force on the drop whose origin and magnitude are the focus of this paper. First, by co-localization of the surfactant micelles with a fluorescent dye, we demonstrate that the heating alters their spatial distribution, driving the interface...
Oil temperature control in a large hydraulic system is dealt with using the fuzzy logic control algorithm. Mathematic model of the control system characterized by large time delay is created based on law of thermodynamics. A self-tuning-parameter fuzzy PID controller is designed to regulate the cooling water flow rate through the triple proportional valve in order to control the oil temperature. The...
Although distinction between ldquorenewablerdquo and ldquonon-renewablerdquo energy resources has important political ramifications, in reality all practical energy production chains use a combination of resources that are renewable to different degrees. Current approaches to definition of renewability are overly simplistic and fail to account for weak formulations of sustainability that allow for...
Controlling engine coolant and oil temperatures to desired values is critical to effective engine calibration on a dynamometer. Because of the large time constants associated with thermodynamic systems, the slow response of coolant and oil temperature often represents a bottleneck in improving engine mapping and calibration efficiency. Nonlinearities in component characteristics, together with varying...
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