Free-air carbon dioxide enrichment (FACE) provides a realistic, cost-effective method for evaluating the effects of supraambient CO2 concentrations on growth, development, yield, and water use of agricultural crops and natural ecosystems with very few of the problems normally associated with glasshouse or chamber type research. There are no walls interfering with incident radiation and no artif...

The issue of the equivalence physical parameters working medium in heat-treatment zone fish and meat products is solved by organizing uniform high-speed fields area, which ensured corresponding design. aerodynamic characteristics a double-sided centrifugal blower fan with vertical arrangement drive shaft spiral scroll two outlet openings, outlines were carried out according to design square rul...

Introduction: The objectives of this study were to determine the air curtain velocities of hood to capture and contain the splashing oil. The optimal flow of air curtain velocities is introduced to apply cooking by pan frying. Methods: At the first stage, palm olein oil was poured to a pan and fried at constant temperature of 180 ± 5 °C for 140 seconds. In the meantime, the 4-air flows, which w...

In traditional raised-floor data center design with hot aisle and cold aisle separation, the cooling efficiency suffers from recirculation resulting from the mixing of cool air from the Computer Room Air Conditioning (CRAC) units and the hot exhaust air exiting from the back of the server racks. To minimize recirculation and hence increase cooling efficiency, hot aisle containment has been empl...

Background and Objectives: In the most Iranian hospitals the internal air is cooled by a system comprising centrifugal blower fan and excelsior filters. Because amoeba can be present in air and dust it may enter into filters of cooling systems. It has been suggested that diffusion of amoebae cyst through air canals may contribute to various types of nosocomial infections. This ...

The combustion effect of natural gas-air mixed is optimised through an effective and rational design the burner structure, thereby reducing emission atmospheric pollutants achieving energy saving reduction. This paper starts from geometric model uses Computational Fluid Dynamics (CFD) technology to numerically simulate distribution in burner, which results after optimising structure. guiding bl...