INFLUENCE OF THE MAGNETIC FIELD ON THE GERMINATION PROCESS OF TOSCA BEAN SEEDS (PHASEOLUS VULGARIS L.)

The experiment was aimed at determining, whether exposure to static magnetic fields of intensities (1T, 2.5T, and 5T) stimulates the growth of Tosca bean seeds (Phaseolus vulgaris L.). Each treatment group in the experiment underwent exposure to the magnetic field for a specific period of time, that is: 900s, 1800s, or 3600s. The measurements of root volumes were taken every 24 hours. The first measurement was taken after 96 hours since the beginning of germination. The collected data was analyzed using statistical methods. The experiment allowed to determine that the magnetic field had a significant influence on the lowering of bean seeds germination rate. The extent of this influence was dependent on the combination of factors: magnetic field force- time of exposure.

Computation for Output Torque of Electromechanical Integrated Toroidal Transmission

The mechanics models of electromechanical integrated toroidal drive in magnetic meshing between stator and planet or between worm and planet are established on the base of electromagnetic theory in this paper. Equivalent current model of permanent magnetic body of planet tooth is founded too. The calculated formulas for magnetic field force between stator and planet or between worm and planet are deduced. And the calculated formulas of output torque of electromechanical integrated toroidal drive are obtained too. The output torque of drive is calculated and analyzed, summarized the influence factors and regulars of output torque, which is the base of design.

Energy savings with the effect of magnetic field using R290/600a mixture as substitute for CFC12 and HFC134a

This paper presents an experimental study on the replacement of CFC12 and HFC134a by the new R290/R600a refrigerant mixture as drop-in replacement refrigerant with and without the effect of magnetic field. Without any modification to the system components drop-in experimental tests were performed on a vapour compression refrigeration system with a reciprocating compressor, which was originally designed to operate with CFC12.The test results with no magnets showed that the refrigerant R290/R600a had 19.9-50.1% higher refrigerating capacity than R12 and 28.6-87.2% than R134a. The mixture R290/R600a consumed 6.8- -17.4% more energy than R12. The coefficient of performance of R290/R600a mixture increases from 3.9-25.1% than R12 at lower evaporating temperatures and 11.8-17.6% at higher evaporating temperatures. The effect of magnetic field force reduced the compressor energy consumption by 1.5-2.5% than with no magnets. The coefficient of performance of the system was higher in the range 1.5-2.4% with the effect of magnetic field force. The R290/600a (68/32 by wt.%) mixture can be considered as an excellent alternative refrigerant for CFC12 and HFC134a systems.