HVAC CFD Simulation Training Package for Intermediates

Description

HVAC CFD Simulation Training Package, 10 Practical Exercises for INTERMEDIATE ANSYS Fluent Users

HVAC CFD Simulation Training Package helps you to overcome the following issue:

• Indoor Air Quality (IAQ)
• Energy Efficiency
• Minimize System Cost
• Reduce Design Time and Expense
• Understand and Diagnose Problems
• Improve Performance

Heating, ventilation, and air conditioning are the technology of internal and vehicular environmental relief. It aims to prepare thermal comfort and tolerable Indoor Air Quality (IAQ). HVAC system modeling is a mechanical engineering subfield based on thermodynamics, fluid mechanics, and heat transfer.

In HVAC System designing, you may encounter considerable technological problems affecting your CFD simulations. Whether you model perfect HVAC systems or the generation of HVAC ingredients, computational fluid dynamics (CFD) software from ANSYS Fluent can support you in outreach your technical challenges.

This training package includes 10 practical exercises in the HVAC field by ANSYS Fluent software for INTERMEDIATE users.

Room Heating (HAVC) Steady-State and Transient (Unsteady) Solvers

Practical exercise number 1 of the HVAC CFD Simulation Training Package simulates heat transfer by a radiator inside a room. The heater is connected to one of the room’s sidewalls, which acts as a heat source, and its body has a constant thermal flux equal to 1886.792 W.m-2. The sidewalls and ceiling have a thickness of 0.2 m of wood, which has convection heat transfer with the outside. Problem number 2 simulates the airflow inside a room and analyses the heat transfer of a heater inside the room using single-sided ventilation. Inside the room, an aluminum radiator is used as a heat source with an output energy of 23469 W.m-3. Also, a window is placed on one of the lateral walls for the airflow outlet.

Project number 4 is simulating heat transfer by a radiator inside a room applying a TRANSIENT solver. The radiator consists of hot water flow pipes and aluminum fins. It is assumed that the hot water flow inside the pipes has a constant temperature, and as a result, the body of the pipes has a constant temperature equal to 353 K. In practical exercise, number 8, a fan heater’s performance and the movement of the heated airflow inside a room are investigated. The air inside the room passes over a heater placed on one side of the room, and a fan is responsible for pushing the heated air into the room. RNG k-epsilon model is exploited to solve turbulent flow equations, and the Energy equation is activated to calculate the temperature distribution inside the computational domain.

Study number 9 examines the performance of fan-driven airflow inside an office for HVAC operation, including a computer and four lamps. The computer is made of plastic and is considered a heat source equivalent to 700 W.m-3, while each lamp material is glass and has a heat source equal to 2500 W.m-3. We install two fans on the upper part of two office walls to transfer airflow into the office.

Building Heating, Ventilation, and Air Conditioning (HVAC CFD Simulation Training Package)

Project number 3 simulates the internal airflow inside an atrium located in a complex. The history of the atrium originates from the architecture of ancient Roman houses, and its modern models in recent centuries are multi-story and have a glass roof and a set of windows that usually are located immediately after the main entrances of the buildings. This part of the building is used to provide the necessary light for the interior of the building as well as building ventilation.

In practical exercise, number 5, the conjugate heat transfer (CHT) of airflow in a simplified 4-story wind tower is investigated. Turbulent airflow enters the domain from the top left region, and due to heat transfer to air from the right diagonal wall with temperature and heat generation rate of solar radiation equal to 305 K and 1000 W/m3, respectively, conjugate (natural convection and forced convection) heat transfer leads to buoyancy effect which helps airflow to exit domain from the top right region. This process creates steady airflow in all four stories of the building.

Problem number 6 simulates the airflow inside the interior of the double-skin facade of buildings. In double-skin facades, the collected air uses heating received from sunlight and moves upward due to the effect of buoyancy, causing heating and cooling inside the buildings. This work aims to investigate the effect of buoyancy on the behavior of heated air inside the interior of a double-skin facade.

In project number 7, the air ventilation is simulated in a greenhouse with two small fans with a radius of 5 cm that rotates at a speed of 100 rad/s. The heat flux of 250 w/m^2 defines the lower wall of the greenhouse, and the sidewalls are defined by a coefficient of 30 and a free stream temperature of 300 K due to the thermal interaction with the outside air convection.

Finally, practical exercise number 10 of the HVAC CFD Simulation Training Package simulates the HVAC inside the room, considering a solar chimney. The present model consists of two main parts, including the interior of the room and a sloping solar chimney on the room’s ceiling. The solar chimney consists of glass plates on its side surfaces that are in contact with the environment and, as a transparent medium, receive the solar energy and also has a plate on its back as a heat-absorbing surface.