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Xi’an, China

Ren T.,Xi an Shiyou University
Advanced Materials Research | Year: 2011

A linkage with dynamic-state balance and small fluctuation load features on its crankshaft would both enhance a motor's efficiency and load rate and reduce its input power by ensuring that the motor is driving as uniform load as possible. It could then be widely applicable to the saving of energy in oil pumping equipment. This paper presents a new model of oscillating block six-bar linkages in which the net crankshaft torque is reduced to a small fluctuation in load by adding the counterweights to the crank and rocking bar. The kinematics and kinetics models of this linkage under the counterbalance were therefore established. Factors influencing the net crankshaft torque fluctuations were analyzed. All parameters of design scheme were optimized using the MATLAB optimization toolbox. Analyses contrasting the effects of energy saving were performed under the actual load conditions. © (2011) Trans Tech Publications. Source


Wu B.,China University of Petroleum - Beijing | Li X.,Xi an Shiyou University | Li Y.,China University of Petroleum - Beijing | Zhu J.,China University of Petroleum - Beijing | Wang J.,China University of Petroleum - Beijing
Energy and Fuels | Year: 2016

The possibilities of hydrolysis of low-boiling organic chlorides in crude oil to generate a corrosive component, namely, hydrogen chloride was evaluated by using thermodynamic analysis under the operating conditions of crude oil distillation in refinery. Thermodynamic analysis was performed based on a previous work about the identity of chlorides and their distribution in YS crude oil of China. The Gibbs free energy change of the hydrolysis was estimated using the specified concentrations of steam and chloride hydrolysis products, and the results indicated that the low-boiling organic chlorides could hydrolyze to corrosive hydrogen chloride during atmospheric and vacuum distillation of crude oil from a thermodynamic point of view. Thermodynamic analysis results also showed that a high temperature and a low pressure are advantageous to the hydrolysis reaction of low-boiling organic chlorides. This thermodynamic analysis is helpful to understand the mechanism for the generation of hydrogen chloride during crude oil distillation as hydrogen chloride can cause serious corrosion. © 2016 American Chemical Society. Source


Zhao J.,Xian Jiaotong University | Zhang N.,Xian Jiaotong University | Zhang N.,China National Petroleum Corporation | Qu C.,China National Petroleum Corporation | And 3 more authors.
Industrial and Engineering Chemistry Research | Year: 2010

Cigarette butts, one of the most ubiquitous forms of garbage in the world, need to be recycled because their toxicity can kill saltwater and freshwater fish. In this study, the cigarette butts are applied as corrosion inhibitors for N80 steel at 90 °C in hydrochloric acid. Weight loss and electrochemical techniques are used to evaluate the corrosion inhibitive effect of cigarette butt water extracts. Results show that the inhibition efficiencies arrive at 94.6% and 91.7% in 10% and 15% (wt %) HCl solution, respectively, by adding 5% (wt %) inhibitor. In 20% HCl solution, they show a maximum inhibition efficiency of 88.4% by adding 10% inhibitor. © 2010 American Chemical Society. Source


Liu Y.,Xi an Shiyou University | He T.,Xi an Shiyou University
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2014

Adsorption characteristic is one of the common problems in coalbed methane reservoirs. Aiming to improve the gas effective permeability of the coalbed methane reservoirs, this paper based on the laboratory experiments demonstrates the essential mechanism of alcohol alleviating adsorption effect, then compares and evaluates the effect of several alcohol solution in the experiments used to slow adsorption. The results indicate that the alcohol treatment can effectively relieve the damage of CBM due to water adsorption. © Sila Science. Source

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