This study was conducted to determine the significance of computational results according application porous media in occupied zone when analyzing air temperature distribution broiler house using fluid dynamics. For such experimental conditions, outside controlled two circumstances : 1) summer and 2) winter. Also, ventilation methods were as well tunnel cross ventilation, differentiating amount...

In order to meet the requirements of driving safety and energy-saving of lighting in tunnel, a fuzzy control method is adopted to design the tunnel lighting control system. A fuzzy control model for the tunnel lighting control system is established with tunnel exterior environment luminance, traffic volume and vehicle speed information as inputs and tunnel interior light luminance as output. Me...

The effects of utilizing evaporative cooling system equipped with tunnel ventilation on postpartum ovarian activities, energy balance and milk production of early lactating dairy cows under hot and humid climates were studied from parturition to 22 wk postpartum. Thirty-four crossbred Holstein-Friesian (93.75% HF×6.25% Bos indicus) primiparous cows were randomly assigned to one of two groups. C...

Many research works are going on to save or protect the environment from different hazardous or toxic gases, chemicals and other harmful effects. Different construction materials (both renewable & non-renewable) are used while constructing any structure, road, railway, tunnel, etc. But every Engineer must know the concept of sustainable development and the particular application of construction...

Because of rapid urbanization, traffic problems, and other factors, underground spaces have been used more in the twenty-first century. Large are required for city, metro, tunnel, mine, industrial agricultural engineering, civil air defense engineering. Underground with varying thermal, ventilation, lighting environments can face problems comfort, health, safety. High temperatures, high humidit...

This paper presents a methodology for evaluating life safety risks in road tunnel fires. The methodology considers three realistic fire scenarios, smoke spread, occupant evacuation, and reliability of fire suppression systems. The three fire scenarios represent three variations of fire growth rates. The road tunnel in this study is assumed to have two traffic tubes, a longitudinal ventilation s...

Using the CFD model, a new ventilation system design will be found later taking into consideration the ventilation efficiency such as uniformity, stability, and suitability of environmental factors in a naturally ventilated broiler house. Because conducting a field experiment for the ventilation study presented so many difficulties, a reliable 3-dimentional computational fluid dynamics (CFD) mo...