The basic design steps of air conditioning system design and its main design procedures

Step 1: Familiarize yourself with the original design information for designing the building

Including: documents provided by the construction party, construction use and process requirements, design assignment, construction work drawings, etc.

Step 2: Data research

Including: consulting related design materials (manuals, specifications, standards, measures, etc.), collecting related equipment and materials.

Step 3: Determine indoor and outdoor design meteorological parameters

According to the area where the designed building is located, check the outdoor air winter and summer meteorological design parameters; according to the use function of the designed building, determine the indoor air winter and summer design parameters.

Step 4: Determine the building thermal parameters and other parameters of the designed building

According to the composition of the building's outer enclosure structure, calculate the parameters such as the heat transfer coefficient of the outer wall, roof, outer door, and outer window; Parameters such as the heat transfer coefficient of the window; according to the use function of the building, determine the number of people in the room, lighting load, equipment load, working time period and other parameters.

Step 5: Air Conditioning Heat and Humidity Load Calculation

Calculate the air-conditioning heat and humidity load (residual heat and humidity) of the designed building under the most unfavorable conditions; compare building energy-saving schemes to determine a reasonable air-conditioning heat and humidity load. Step 6: Determine the best air-conditioning scheme Through technical and economic comparison, select and determine the air-conditioning system mode, cold and heat source mode, and air-conditioning system control mode suitable for the designed building.

Step 7: Calculation of supply air volume and airflow organization

According to the calculated air-conditioning heat, humidity load and air supply temperature difference, determine the air supply status and air supply volume in winter and summer; calculate and determine the minimum fresh air volume according to the working environment requirements of the designed building; according to the air conditioning mode and the calculated air supply and return air volume , determine the form of the air supply and return air outlets, arrange the air supply and return air outlets, and design the airflow organization.

Step 8: Air Conditioning Water and Air System Design

Arrange air-conditioning air ducts, conduct hydraulic calculations for the air duct system, determine pipe diameters, resistance, etc.; arrange air-conditioning water pipes, perform hydraulic calculations for water piping systems, and determine pipe diameters, resistance, etc.

Step 9: Design selection of main air conditioning equipment

According to the air treatment plan of the air conditioning system, combined with the i-d diagram, the air conditioning equipment selection design calculation is carried out; the capacity (heat load) and air supply volume of the air treatment equipment are determined, and the structural form of the surface heat exchanger and its heat dissipation are determined. According to the hydraulic calculation of the air duct system, determine the flow rate, wind pressure and model of the fan.

Step 10: Design of smoke prevention and exhaust system

Step 11: Cooling and heating source computer room design

Determine the capacity and model of the cold source (refrigerator) or heat source (boiler) according to the capacity of the air handling equipment; determine the flow rate, head and model of the water pump according to the hydraulic calculation of the piping system.

Step 12: Design of cold and thermal insulation, noise reduction and vibration isolation of air-conditioning equipment and its pipelines

Step 13: Draw engineering drawings, arrange design and calculation instructions Calculation of air-conditioning heat and humidity load

Phenolic duct making machine is als called pre insulated duct making machine. phenolic duct making machine or pre insulated duct making machine is used to cut Phenolic duct panels. For example, it can cut a 4 meter long Phenolic duct panel in just 30 seconds. Phenolic duct making machine or pre insulated duct making machine can be used to cut duct fittings in just few minutes.

Air-conditioning load can be divided into air-conditioned room or area load and system load: air-conditioned room or area load is the load that occurs directly in the air-conditioned room or area; there are also some loads that occur outside the air-conditioned room or area, such as fresh air Load (the load caused by the difference between the state of the fresh air and the state of the indoor air), the temperature rise (drop) load of the pipe (the load caused by the heat transfer of the air pipe or water pipe), the temperature rise load of the fan (the temperature rise of the air after passing through the fan), the water pump Temperature rise load (the temperature rise of the liquid after passing through the water pump), etc. These loads do not directly act on the room, but are ultimately borne by the air conditioning system. The combination of the above loads that directly occur in the air-conditioned room or area and the additional load that does not directly act on the air-conditioned room or area is called the system load.

Usually, the air supply volume or air supply parameters of the air conditioning system are determined according to the heat and humidity load of the air-conditioned room or area; Heat source equipment. Therefore, the first step in designing an air conditioning system is to calculate the heat and humidity loads of the air conditioning room or area.

Phenolic duct making machine is als called pre insulated duct making machine. phenolic duct making machine or pre insulated duct making machine is used to cut Phenolic duct panels. For example, it can cut a 4 meter long Phenolic duct panel in just 30 seconds. Phenolic duct making machine or pre insulated duct making machine can be used to cut duct fittings in just few minutes. 

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