Since the energy efficiency ratio (EER) of the air conditioning system is dependent on the efficiency of the motor in addition to the performance of the refrigerant system. the motor efficiency can be viewed as a source of EER improvement. The amount of motor efficiency improvement obtainable is in turn dependent on the motor material characteristics and the motor size or volume which is usuall...

there are instances in which it is desirable to determine relationships among fruit physical attributes. for example, fruits are often graded on the basis of size and projected area, but it may be more suitable and/or economical to develop a machine which grades by mass. therefore, a relationship between mass and dimensions or projected areas and/ or volume of fruits is needed. various grad...

Abstract We consider evaporation of pure liquid drops on a thermally conductive substrate. Two evaporative models are considered: one that concentrates on the liquid phase in determining evaporative flux, and the other one that centers on the gas/vapor phase. A single governing equation for the evolution of drop thickness, including both models, is developed. Experiments are used to estimate re...

We consider evaporation of pure liquid drops on a thermally conductive substrate. Two commonly used evaporative models are considered: one that concentrates on the liquid phase in determining the evaporative flux and the other one that centers on the gas-vapor phase. A single governing equation for the evolution of drop thickness, including both models, is developed. We show how the derived gov...

Single phase unified power quality conditioner (UPQC) consists of series and shunt active power filter (APF) with common dccapacitor. Series converter acts as voltage source converter and shunt converter acts as current source converter. Use of non-linear loads results in voltage and current harmonics. These harmonics can be eliminated by using single phase UPQC. So that, which also improves th...

This paper presents a new procedure for the speed changing of the twospeed compressor driven by the singlephase Permanent Split Capacitor (PSC) motor. The use of the two-speed motor for compressor is one of the effective ways for their capacity control. But the two speed compressors now in use are driven by three-phase motors. It is because a single-phase, two-speed motor has rather a small sta...

Was concentrated on tree phase matrix converter topology. Single-phase Matrix converter or SPMC was first implemented by Zuckerbeger4. Now presented a.Abstract. This paper presents the single phase matrix converter topology that will operate as an uninterruptible power supply circuit. A single circuit is developed.Single phase matrix converter SPMC performs a function such as frequency changer,...

DID YOU KNOW ? Charles Proteus Steinmetz (1855-1923) was born in Breslau, Germany, the son of a railway worker. His political activity forced him to flee Germany. He came to America and was soon employed by General Electric to head up their research facility. He was referred to as “the wizard of Schenectady”, “the forger of thunderbolts”, and “the latter-day Vulcan”. Harvard University said of ...

in this work, the structural and electronic properties of folic acid molecule on functionalized (7,0)zigzag single-walled carbon nanotube was studied in gas phase on the basis of density functionaltheory (dft). furthermore, covalent interaction of folic acid with single-walled carbon nanotube wasinvestigated and its quantum molecular descriptors and binding energies were calculated. the dftb3ly...