Review on Key Factors of Wireless Power Transfer Technology for Electric Vehicles

Electric vehicles (EVs) have become an alternative option for a clean energy society. A new charging technology which is wireless charging has been developed to satisfy the limitations of EVs which are the electric drive range and battery storage. Companies like Tesla, BMW, and Nissan have already started to develop wireless charging for EVs. This paper presents a literature review on wireless charging of EVs. The existing technologies for Wireless Power Transfer (WPT) system are summarized for different power applications. Coil design plays the most vital role in the WPT system so the different coil design with the transferred efficiency is reviewed. The other important parameters and technical components like significant factors of WPT system, track layout of dynamic wireless charging, foreign object detection method, and position alignment method that are affecting the efficiency of the wireless charging system are also discussed. Lastly, health and safety concerns for human beings and living things are investigated

Cellular Premixed Flames of Synthetic Biogas Composition Effects on Flat Burner

To compare the effects of biogas compositions, cellular premixed flames of synthetic biogas on flat burner was investigated. As the variation of main composition of biogas such as methane (CH4) and carbon dioxide (CO2), the biogas produced from agricultural waste (54.9 : 45.1), food waste (73.4 : 26.6) and cow dung (85.1 : 14.9) were used to investigate for this study. Moreover, the lean combustion system was experimented on flat burner to reduce the greenhouse gases. The variation of equivalence ratio between Φ = 0.65 - 1.00 and firing rate with 45 L/min of mixture flow rates were studied. The results showed the cellular flame from agricultural waste, food waste and cow dung were found between Φ = 0.75 - 1.00, Φ = 0.70 - 0.90 and Φ = 0.65 - 0.80, respectively. In addition, the blown off flames were also observed at Φ < 0.75, Φ < 0.70 and Φ < 0.65 from agricultural waste, food waste and cow dung compositions, respectively. The results showed the variation of biogas compositions, equivalence ratio and firing rate affected to cellular flames owing to the intrinsic instability. Moreover, it was concluded that small cell size, higher light emission and narrower unstable range and wider flame range obtained in the combustion of biogas produced from cow dung composition, was more stable compared to biogas from agricultural waste and food waste compositions

An Experimental Investigation of Top-of-Line Corrosion in a Static CO2 Environment

This paper presents an experimental and theoretical investigation into water condensation and corrosion under noncorrosion product forming conditions at the top of the line in a static, CO2 environment. An experimental test cell is developed to measure droplet lifetimes, condensation rates, as well as in situ and integrated corrosion rates (using miniature electrodes and mass loss specimens, respectively) as a function of the surface and gas temperatures when the gas flow is dominated by natural convection. Experimental results show clearly that the water condensation rate is not very influential on the corrosion rate at low surface temperatures (Ts) (particularly below 25°C) but becomes much more important at higher surface temperatures (>40°C). These findings are summarized in a new empirical correlation for the top-of-line corrosion rate as a function of the condensation rate and surface temperature. A model for condensation at the top of line for static, buoyancy-driven conditions is also presented and is shown to predict dropwise condensation rates accurately for a range of experimental conditions. The developed miniature electrodes for in situ electrochemical measurement are shown to provide an accurate interpretation of the transient response in general corrosion behavior by giving real-time corrosion rates to complement the mass loss measurement