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The design of the main contents include: research background and significance;The calculation of air conditioning cooling load;In the selection of air conditioning equipment;Duct pipe figure drawing;Airflow organization;Duct pipe hydraulic calculation;Construction drawings.Written instructions.Reference literature mainly has “The practical heating air conditioning design manual(second edition)”;“The civil building heating ventilation and Air conditioning design standard (GB50736-2012)”;“The code for fire protection design of buildings (GB50016-2014)”, etc.
Air conditioning wind system design steps are as follows: the hourly cooling load calculation of the room, including the parameters of the selected;In the selection of air conditioning equipment;Decorate the wind pipe and equipment;Draw the plan of the indoor air pipe;Wind pipe network hydraulic calculation, the purpose is to determine the diameter of each section.In the end, drawing ventilation system plan and system diagram.Air conditioning water system design steps are as follows: the choice of air conditioning water system;Air conditioning water system arrangement;Fan coil water systems hydraulic calculation, including chilled water, cooling water and cold water, to determine the diameter of each section of the most unfavorable loop pipe pressure loss calculation;Check whether the initial way feasible;Air conditioning water system pipe material selection;Arrangement of the pipe and equipment;In the end, drawing water system plan and system diagram.
Air conditioning cooling load calculation of the first is the roof and walls of cooling load and cooling load calculation, and then is outside the window again is caused by indoor heat cooling load, the body cooling load and cooling load of the lighting, etc.The selection of air conditioning equipment based on the calculated cooling load and moisture load and the new air volume, through the fan coil selection manual select the right equipment.Duct layout first is based on results of calculating the load of each room fan coil number arrangement, and then according to each area of uniform arrangement, layout appropriate quantity of fresh air unit according to the load calculations;The pipe main set according to the fan coil position.Hydraulic calculation is based on the calculated load, flow rate, pipe diameter, length, and for the return water temperature, step by step to calculate.
This design is the air conditioning system of Hui Yang shopping center A. The building has three floors, of which the area is 3559.7m2 and the air conditioning area is 2634.74m2. The height of the first or second floor is 5m. The third story is 6m.The air conditioning rooms mainly are the banquet hall, business center, lobby, conference room, kitchen, lounge and meeting rooms. By using HongYe HVAC load calculation software 8.0,I carry on the computation load on the building air conditioning room area. The total indoor cooling load in summer is 252534W, indoor cold load index is 179.4W/m2. As the building is a shopping centre, in order to satisfy the customer comfort degree and air conditioning system energy saving, the banquet and lounge hall use the return air system. Small room such as the meeting room is the use of fan coil plus fresh air mixing system. A large area of the hall, banquet hall, rest hall is used all air system.In order to be able to effectively carry out the desiccant and can meet the air flow, we require that the form of the nozzle is the diffuser air supply form.Mainly considering its small area, low noise, being easy to control and so on, the business center, conference rooms adopt the fan coil unit and fresh air mixed system to send airflow organization forms. In addition, I also have a simple design of fire smoke exhaust system, anti-corrosion insulation and noise reduction, etc.
This design since February 21, 2016, to 2016 on May 21, complete the finalized, lasts for 3 months.
Key words: air conditioning system; cold and hot load; fan coil unit; mixed fresh air; all-air system