HVAC – ANSYS Fluent Training Package, 10 Practical Exercises for ADVANCED Users
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HVAC ANSYS Fluent Training Package, 10 Practical Exercises for ADVANCED Users
This training package includes 10 various practical exercises in the HVAC field by ANSYS Fluent software for ADVANCED users.
Room, Building, and Office HVAC
In practical exercise number 1, the movement of the heated airflow inside a room by the split air conditioner is investigated. The air inside the room is heated using two split coolers and is distributed inside the office with people, using two fans. A realizable 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. In project number 4, steady airflow is investigated between two 3-bladed series fans which are rotating at an angular velocity of 300 rpm applying the Frame Motion Method (MRF). Rotation of fans generates air suction at the inlet boundary with a flow rate equal to 2.95755 m3/s. The velocity of air reaches values up to 25 m/s on the domain centerline however maximum air velocity in the domain is equal to 47.05 m/s which is captured downstream of the first fan.
Practical exercise number 5, steady airflow enters the domain from the bottom of the computer room by several inlets and exits the domain from several outlets on the ceiling considering Radiation heat transfer. This air conditioning method is new and is commonly used in office environments nowadays. This method provides more energy efficiency since the flow naturally goes upwards due to density difference and buoyancy body force. Problem number 7 simulates the heat transfer inside a mosque applying the radiation model. In the present case, it is assumed that heat transfer takes place in two modes of convection and radiation. In fact, the building’s indoor heating source is powered by solar energy and a heat source used on the ground floor of the mosque.
Problem number 8 simulates the airflow through the space between the two walls of the double façade of the building. To move the airflow upwards in this space based on the density changes caused by the pressure and temperature changes, the boundary condition of the pressure equal to the atmospheric pressure at the inlet and outlet of this space has been used. The main cause of temperature changes is the presence of solar energy on the plates of these shells; therefore, the radiation energy model of Discrete Ordinates (DO) and the solar ray tracing model have been used.
In project number 2, the ventilation system of a ship’s engine room is investigated. This room consists of an air inlet (mass-flow type, 35 Kg/s) and two pressure outlets. The diesel engines and motors generate heat (12500 and 8333.333 W/m3 respectively) while working, the injected air (300 K) has the responsibility of cooling the engine room and lowering the temperature of engines and motors. Problem number 3 simulates the airflow around several generators in a generator room and the effect of a set of fans on them. Generators are generally mechanical devices that can convert mechanical energy into AC or DC electrical energy. This process of generating electricity is done by changing the magnetic field of a conductor.
CORONA & Operating Room / Clean Room
In case number 6, the operating room HVAC considering the equipment and persons within it, including the doctor and patient, using an air conditioning system, is simulated. The system uses a laminar flow to purify the air of the operating room and a linear flow called an air curtain to prevent contaminated flow into the fresh air. The source of the contaminants and excess gases is assumed on the patient’s body.
Problem number 9 simulates the flow of fresh air through the air conditioning system inside a patient’s cleanroom considering the CORONA virus. We place the patient on a bed in a room with a high temperature on his body and constantly spreads the CORONA-virus particles by breathing through his mouth into the room’s interior. In fact, the goal is to use an air conditioning system and keep the fresh air flowing continuously inside the room to remove contaminants from the patient’s mouth through the outlet vents, and the room environment should be purified in terms of pollution, and a balanced and pleasant temperature should be provided for the thermal comfort of the patient inside the cleanroom.
Finally, in practical exercise number 10 based on the CFD method, an attempt has been made to simulate the respiration of viral air from the mouths of several patients carrying coronavirus in the aircraft. This model includes a computational domain in the form of an airplane and seats inside it, on each of which a passenger is modeled. For each of these passengers, a surface is defined as the mouth as the source of respiration and transmission of the coronavirus.
You can obtain Geometry & Mesh file, and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.