The effect of the volume flow rate of the heat transfer fluid (air) on the thermal parameters of the solar air collector with a single air pass without using fins under the absorbing plate have been investigated experimentally and theoretically. We use a new design of solar air collector which aims to optimize these parameters in the region cited above. Our solar air collector was realized at t...

The method of preparing the distilled nutrient medium has been improved, thus rendering the cultivation of the bacillus leprae in this medium much more potent for the preparation of leprolin. Small pieces of pumice stone are washed and dried in the sun, and then made to absorb beef extract; they are then placed in bottles having a wide central tube leading to the bottom, aiuKin outlet tube at t...

Several theoretical predictions of the mass flow rate of granular media discharged from a silo are based on the spontaneous development of a free-fall arch region, the existence of which is still controversial. In this Letter, we study experimentally and numerically the particle flow through an orifice placed at the bottom of 2D and 3D silos. The implementation of a coarse-grained technique all...

A new structure bulk tobacco curing barn was presented. To study the temperature and humidity field in the new structure tobacco curing barn, a 3D transient computational fluid dynamics (CFD) model was developed using porous medium, species transport, κ-ε turbulence and discrete phase models. The CFD results demonstrated that (1) the temperature and relative humidity predictions were validated ...

The value of biogas produced at small scale facilities, such as farm scale biogas plants, can increase by upgrading it to vehicle fuel quality. However, commercial upgrading technologies available today are very costly for small scale applications. Ash from combustion of wood fuels has a high content of Ca, which indicates favourable conditions for a high CO2 uptake capacity from biogas. The ob...

Self-aerated flows in flat chutes are encountered downstream of the bottom outlet, spillways with a small slope and storm waterways. In present study, development self-aeration chute flow is described new experiments performed long pressure outlet for different discharge rates. The distribution air concentration, time mean velocity fluctuation direction self-aerated developing region—where bubb...

Sedimentation in reservoirs is an important issue that should be considered for the reservoirs operation and useful life. In this study, application of the Adaptive Neuro-Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN) in prediction of the sediment release from the bottom outlet using semi-cylinder for different variables was evaluated. Dimensionless parameters such as dimens...

In hot summers, air conditioning (AC) and mechanical ventilation (such as fans) are used cooling modes that strongly influence the resultant indoor environment, like thermal comfort quality in shops of a Nanning arcade street (qilou). The circulation mode greatly affects environment level freshness. approaches for effectively improving developed qilou with air-conditioner humid region southern ...

ABSTRACT Among several techniques for prevention and mitigation of reservoir sedimentation, bottom outlets arise as a means removing sediment deposited close to the dam. Given reduced removal provided by traditional under pressure flushing conditions, this article proposes new type structure that aims increase in direction parallel dam axis. An experimental installation was employed evaluate it...