The ventilator inhales fresh air from outside into the inside cabin of a vehicle and exhales hot air to the outside. On a sunny day, solar energy can be used to run the ventilator, and to charge the battery simultaneously. During a cloudy day, the ventilator can be driven by the battery. In this paper, heat transfer and energy balance inside the car were investigated. Moreover power consumption...

Several current problems in atmospheric radiation over the tropical oceans may have at least partial solutions as effects of diurnal variations of outgoing longwave radiation (OLR). At issue are explanations for the following: a) excessively large amplitudes (in relation to theory) of the diurnal thermal tides over the tropical oceans (Braswell and Lindzen 1998); b) reported observations of exc...

The demand for low-priced solar cells with higher efficiencies becomes more necessary to reach grid parity. An optimized solar cell design which uses the same equipment as state of the art solar cells could be easily implemented into solar industry. In this paper an approach for a front side design is discussed, using more busbars than the widely used three busbar design for the solar cell fron...

SARSCOV-2 virus and new strains have been spreading in most countries regions around the world, COVID-19 epidemic it causes has infected millions of people, urgent need is to prevent their spread. On market, there are many types hand wash equipment automatically spray disinfectant solution used with different sensors operating principles, but still using AC power. In this topic, we design autom...

Market penetration studies indicate that in the absence of tax credits, large reductions in the costs of active solar hot water/space heating systems will be necessary. A number of potential means for equipment and labor cos‘t reductions are pres'ented. The use of drainback systems with'polybutylene pipe and a variety of low-cost collector concepts is discussed-. The pros and cons of the variou...

In this study, a microcontroller based measurement station has been designed to measure and save the wind speed, direction, solar radiation, temperature and transmit by means of wireless communication to the other station. As a result of this study, measurement equipment with easy programmable, flexible and low cost measuring has been designed, implemented and usability of the device has been t...

A selected number of Fe II level lifetimes have been measured anew with an improved experimental equipment and evaluation procedure yielding data with uncertainties around 1%. The lifetimes have been used to rescale the corresponding oscillator strengths and to derive solar abundances. On average, the iron abundance, log N(Fe) = 7.42 ± 0.09 on the scale log N(H) = 12, is further reduced support...

To address the static voltage stability issue and suppress the voltage fluctuation caused by the increasing integration of wind farms and solar photovoltaic (PV) power plants, a two-tier reactive power and voltage control strategy based on ARMA power forecasting models for wind and solar plants is proposed in this paper. Firstly, ARMA models are established to forecast the output of wind farms ...