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Solar Chimney CFD Simulation

$110.00 $99.00

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Today, due to the challenges of fossil fuel consumption such as increasing air pollution, greenhouse gas emissions and limited resources, the world is using renewable energies such as solar, waves, hydro-static, wind and ground energy. One way to utilize solar energy is solar chimney. The basis for solar chimney is the difference in density and pressure difference due to the increase in temperature inside the solar collectors, which acts as a force.

This product includes a CFD simulation and training files using ANSYS Fluent software.

There are some free products to check the service quality.

Description

Solar Chimney

Solar energy is one of the cleanest and most accessible sources of electricity on earth, especially in areas with high annual solar radiation. In a solar chimney system, there is a transparent roof that is capable of absorbing solar radiation energy. On the other hand, the air entering the system from the sides of this roof collects in the space between the roof and the ground; in fact, the transparent roof and the ground appear as a collector. The heat received by the ceilings of the solar chimney heats the air in this space and moves upwards due to its lightness. In the middle of this roof, there is a vertical chimney or tower, which due to the difference in pressure between the hot air flow and the cold air, causes the hot air to rise up into the upper part of the chimney.

Solar Chimney Types

Generally we can divide these solar chimneys into two categories:

1.  The first category is the chimneys for power generation which are of industrial scale.

2. The second category is the ventilation chimneys for cooling and heating used with a residential scale.

Mechanism

In this simulation, we model a home solar chimney. The lower part of the chimney is a plate to absorb heat of the solar radiation, which we assume it as a constant temperature in the present simulation. The ground floor below this chimney also has a constant temperature. The chimney wall is assumed to be insulated to prevent heat loss. The inlet section below the absorber surface has a pressure equal to the atmospheric pressure, while the pressure in the outlet of the chimney is lower than the atmospheric pressure. This causes the air to suck upward to the top of the chimney, thereby discharging warm air through the chimney.

Assumptions

For the present simulation, several assumptions are taken into account:

1. The problem is unsteady (transient).

2. Incompressible flow is assumed.

3. The effect of gravity is taken into account.

All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.

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