Refrigeration is a process of maintaining the temperature lower than surroundings. It can be achieved with help components refrigerator and refrigerant. Refrigerant substance atmosphere. VCR widely applied in daily as well large scale industry to produce refrigeration effect. The diffuser passage that will increase pressure energy by changing kinetic at inlets. main objective this project work ...

A perfect connection between the column and fan is that which ensures an air inlet in fan, evenly distributed, over entire surface of suction mouth outlet from made a way allows full use developed pressure. For both exhaust, fans must be equipped with device/diffuser. When discharges freely into atmosphere without any connection, loss equivalent to 50% average dynamic pressure at discharge port...

When considering the interaction between impeller and diffuser, it is necessary to provide logical systematic guidance for their matching optimization. In this study, goal was develop a comprehensive optimization strategy optimize diffuser of mixed flow pump. Some useful tools methods, such as inverse design method, computational fluid dynamics (CFD), experiment, surrogate model, algorithm, wer...

A validated three-dimensional unsteady computational fluid dynamics analysis is performed in this study to investigate the effects of inlet flow conditions on thermal performance solar storage tanks. First, different mass rates a simple tank (Model 1, single and outlet) are investigated. The results show that higher deteriorate thermocline stratification which desirable. To reduce unfavorable j...

Effects that two different compound-angle film-hole configurations have on film cooling effectiveness are investigated. Effectiveness measurements have been made downstream of a single row of compound-angle cylindrical holes with a diameter of 7.5 mm, and a single row of compound-angle, diffuser-shaped holes with an inlet diameter of 7.5 mm. Both geometries were inclined with respect to the cov...

As part of ASHRAE Research Project 1185, field data from the constant flow rate charging of a stratified chilled water storage tank with double-ring octagonal slotted-pipe diffusers serving a university chilled water system were compared with results of a transient axisymmetric computational fluid dynamics (CFD) model. Charge processes at flows near design flow rate and 50% of design were model...

In practice, the outflow from a diffuser is highly non-uniform due to many reasons. However, air velocity uniform in most current studies. Little research has been conducted determine under what conditions can be used. Therefore, based on non-uniformity of velocity, airflow characteristics grille and ceiling diffusers were investigated experimentally numerically. Two generic CFD cases (non-unif...

A new annular lift fan configuration that has very high lift efficiency is explored by using a numerical scheme. The inlet lip radius and diffuser angle are maximized by semicircle duct walls and the location of the lift fan is moved from the throat to the diffuser area to maximize the diffusion effect of the ducted fan. The improved lift fan achieves the figure of merit of 0.772 and the power ...