Vol. 2, Issue 4 (2016)
Study development of method experiment LJGP which integrated technology arduino-uno and digital sensor with dimension of throat ratio 32,63mm
Author(s): Eswanto Is
Abstract: The data was good, fast and efficient on Liquid Jet Gas Pump (LJGP) is necessary to obtain the best conditions LJGP vacuum tool. The retrieval of data, manual calculation in this study are considered less effective because it takes a long time. It is therefore necessary for the development of research by integrating the tool LJGP with Arduino-uno technology and digital sensor that can be directly simulated in the computer. LJGP construction consists of a nozzle, section chamber, throat and diffuser. In this study, mean flow ratio is the ratio between primary flow and secondary flow, while the pressure ratio is different discharge pressure and suction pressure divided by the primary pressure reduced discharge pressure. The purpose of this study was to obtain research data efficiently and accurately can be directly simulated in the computer as well as to determine the effect of flow ratio of the pressure ratio at LJGP which functioned as a vacuum pump as well as its efficiency. The research method with experiments involving water fluid and air in the throat ratio is 32.63 mm, the observed data is the primary flow / motive flow is 0.32 L/s, up to 0.44 L/s and secondary flow ranged from 0.04 L/s to 0.2 L/s. The results of this study obtained data quickly, accurately, efficiently using Arduino-uno technology and digital sensor compared to manual data collection. On the other hand the test results using the dimension of 32.63 mm throat ratio obtained maximum efficiency of 10.69% on Qgas = 25 scfh (0.566) in the liquid discharge 6 gpm. While the lowest efficiency is obtained upon discharge QL = 10 gpm with the efficiency of 8.89% and Qgas = 25 scfh (0.415). The phenomenon of loss of efficiency due to the losses and the possibility of shock by wall in the fluid. Lowest vacuum level obtained in the discharge motive 6 gpm is equal to 187.995 Pa at 25 scfh measurement scale (0.000196 m3/s), while the highest vacuum is obtained at 10 gpm with motive flow is 257.909 Pa on scale of 25 scfh (0.000196 m3/s).