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Dr. SOLI NESSRINE

University of Gabès, Tunisia


Title: Study of Munters-Platen cycle with Propylene as a refrigerant

AbstractThe human tendency consists in seeking a greater material comfort continuously and the field of the production of cold does not escape the rule. This tendency is evolved quickly, which requires more energy, therefore more terrestrial warming and climate change. Research again non-harmful refrigerant for the environment becomes more and more of a major importance.We proposes in this work the study of the operation of a refrigerating machine with absorption-diffusion with the mixture of hydrocarbons. It is about a refrigerating machine of low power (300 W) functioning on a level of temperature of the generator lower than 150 °C (fossil energy or solar energy) and operative with non-harmful fluid for the environment. A mixture of hydrocarbons (propylene / nonane) was considered and compared .We used helium as inert gas. The total pressure of operation is about 17.5 bar. A modeling on a software of flowsheeting Aspen Plus and Aspen Hysys was made. The mixture of hydrocarbon (propylene/n-nonane) proposed is a rather promising refrigerant as for the technical advantages which they offer, such as the use potential of a source of heat at a temperature not exceeding 150 °C and of the performances closed to those functioning with the mixtures usual(NH3-H2O-H2). 



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A.Prof. Baoping Cai

China University of Petroleum,  China  


Title: Development of Subsea Systems for Offshore Oil and Gas Equipment

AbstractWe developed a high-reliability control system for 3000 m subsea blowout preventer stack for China National Offshore Oil Corp., and proposed a series reliability evaluation approaches for subsea equipment. We are working on Bayesian-network-based fault detection and diagnosis methodology and has developed two diagnosis systems for subsea blowout preventer and subsea Christmas tree system.





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A. Prof. Samuel Simon Araya

Aalborg University,  Denmark

 

Title: fuel cell diagnostics by means of electrochemical impedance spectroscopy

AbstractAs fuel cells improve in durability and are slowly deployed for various applications, their reliability and availably becomes of paramount importance to guarantee the desired power output whenever it is needed. Different faults can occur within the fuel cell system due to changes in operating conditions, and a continuous monitoring of its state of health along with a robust diagnostics system can be used to identify and isolate these faults before system failure happens. This presentation will focus on the use of electrochemical impedance spectroscopy for online fuel cell health monitoring and diagnostics.


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A.Prof.Xin CUI

Xi'an Jiaotong University,China


Title: Energy efficient indirect evaporative pre-cooled air conditioning system in humid tropical climate

AbstractEvaporative cooling system is an environmentally-friendly and energy saving technology for air conditioning. However, in hot and humid climates, it is rather inefficient due to the high wet bulb temperature of the ambientair. In order to take advantage of indirect evaporative cooling (IEC) system in humid tropical climates, we present a hybrid system that combines IEC system and vapor compression system. The indirect evaporative heat exchanger is employed to pre-cool the ambient humid air before passing through the vapor compression system. A computational model has been developed for the evaporative pre-cooling process. Results have indicated that the humid outdoor fresh air can be pre-cooled to a temperature below its dew point temperature when the wet bulb temperature of the exhaust air is lower than the dew point temperature of the outdoor air. In addition, the use of IEC reduces the cooling load of the vapor compression system, as a result, the hybrid system has a large potential to reduce electricity demand and energy consumption






Oral speaker:



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Xiaofei Sheng

Tianjin University


Title: Experimental Research on Transient Electromagnetic Logging Method in Cased Holes

AbstractDue to the strong shielding effect of steel casing and the limited space in cased hole, it is difficult to identify the formation resistivity distribution. Based on previous studies, a prototype transient electromagnetic logging tool and a cased hole model have been designed and built, feasibility experimental study in cased hole model was conducted by researching the responses received by the receivers with long source-receiver offset, some experimental achievements on transient electromagnetic logging in cased hole are presented. In the experimental research, three sets of experiments were conducted to study the characteristics of the measured responses with the changing of the vertical source-receiver offset, water level and water conductivity outside the casing. The experimental results indicates that: 1) the response inside the casing is strongly sensitive to the change of the source-receiver offset, both in amplitude and phase, so it’s hard to obtain useful information from the responses received at different source-receiver offset; and 2) the response difference curves, which are obtained from the responses measured by the same receivers, especially the ones with longer source-receiver offset, are sensitive to the change of the water level outside the metal casing during the water-injection process and the water conductivity during the salt-adding process. The results indicate that long source-receiver offset transient electromagnetic logging tool could be used to map formation conductivity outside the metal casing and further provide guidance for actual production in designing long source-receiver offset transient electromagnetic tools in numerous similar applications.







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Liwei Zhou

Tianjin University


Title: Modified color for VO2/Au/VO2 sandwich structure-based smart windows

AbstractVO2/Au/VO2 sandwiched structure was fabricated by rapid thermal annealing of sputtered V/Au/V sandwiched structure to modify the intrinsic unpleasant brown–yellow color of VO2 films based on the localized surface plasmon resonance (LSPR) for smart windows. The morphology, crystalline structures, and optical transmittance spectra of the sandwich structure were characterized by sanning electron microscopy, X-ray diffraction and UV-VIS-NIR spectrophotometry, respectively. The obtained results indicate that the VO2/Au/VO2 sandwich structure with different Au nanoparticles sizes shows different color from brown–yellow to blue–green due to the appearance and redshift of LSPR peak. Moreover, the phase-transition temperature for the optimized VO2/Au/VO2 sandwich structure was only 42.5 °C, far below 68 °C for bulky VO2. The optimized VO2/Au/VO2 thin films could simultaneously meet the requirements of comfortable color and a reduced phase-transition temperature, and these excellent features would benefit the practical application of VO2 thin film-based smart windows.




 


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