Autonomous electrical heating facility supplied by wind turbine for elimination of oil wellbore paraffin deposits
The article considers an autonomous electrical heating facility supplied by a wind turbine designed to eliminate paraffin deposits in an oil wellbore. Computer modeling of the facility is performed. Modeling results are verified with a laboratory simulation bench. Operating curves for various operating conditions are obtained. An optimal resistance of the heating cable is determined to ensure a maximal efficiency of the wind turbine, as well as the amounts of energy produced by the wind turbine with a constant load resistance and resistance control are compared.
Oil wellbore electrical heating station with wind-driven power unit
The article discusses an autonomous complex for electrical heating of oil wellbores using heating cable and powered by a wind-driven power unit. Simulation and computer modeling of the complex is performed. Operating curves for various operating conditions are obtained. An operating mode control algorithm is proposed for the complex ensuring efficient operation of the wind-driven power unit.
Laminar heat or mass transfer in rectangular channels and in cylindrical tubes for fully developed flow: comparison of solutions obtained for various boundary conditions
Abstract A comparison is made of results obtained with various boundary conditions at the wall of the channels. By comparing blood Sherwood numbers for finite wall resistance with those for constant concentration boundary condition only a small variation is found for various points along the blood channel.