Advantages and disadvantages of using variable air volume air conditioning system in sterile purification workshop
Advantages and disadvantages of using variable air volume air conditioning system in sterile purification pharmaceutical cleanroom
In this article, Jing Global Purification will take you to understand the advantages and disadvantages of the aseptic purification pharmaceutical cleanroom when choosing the variable air volume air conditioning system.
The advantages of the variable air volume air conditioning system that distinguish it from other forms of air conditioning are mainly reflected in the following aspects:
(1) Frequency conversion empty...
Text label: sterile purification workshop, variable air volume air conditioning system
Advantages and disadvantages of using variable air volume air conditioning system in sterile purification workshop
In this article, Jing Global Purification will take you to understand the advantages and disadvantages of the aseptic purification pharmaceutical cleanroom when choosing the variable air volume air conditioning system.
The advantages of the variable air volume air conditioning system that distinguish it from other forms of air conditioning are mainly reflected in the following aspects:
(1) The power consumption of the blower of the inverter air conditioner unit is greatly reduced. Since the air conditioning system is in a partial load state during most of the actual operation of the year, the variable air volume air conditioning system can be easily adjusted accordingly to control the air supply volume in the air conditioning area, and the terminal device controls the air supply volume. The blower of the unit coordinately controls the speed of the blower to adjust the total air volume.
(2) It can realize the recording and live control of local area (room), and can automatically adjust its own working environment according to the change of load or personal comfort requirements; it can adapt to a variety of ways without heating or double air ducts. Indoor comfort requirements or process design requirements; eliminate the loss of hot and cold mixing in the reheating method or the double air duct method. It can automatically adjust the input energy of each air-conditioning area. Considering the simultaneous use factor, the total installed capacity of the air conditioner can be reduced by 10% to 30%.
(3) Make full use of outdoor fresh air as a cold source to reduce the operating energy consumption of the refrigeration system. In any season, as long as the enthalpy value of the outdoor fresh air is lower than the indoor value, the outdoor fresh air can be used as the cooling source of the system, and the variable air volume air conditioning system can operate in the economic cycle mode.
(4) There is no shortage of condensed water pollution. The variable air volume air conditioning system is an all-air system, and the cold water pipeline does not pass through the ceiling space, so there will be no condensed water dripping and contamination of the ceiling encountered in the use of the fan coil unit and the fresh air system.
(5) Flexible system application. In buildings with constant air volume system or fan coil unit plus fresh air system, it is very difficult to make partial transformation of the air conditioning system. . The installation position of the variable air volume air outlet can be arbitrarily changed according to the change of room separation, and the variable air volume air outlet can also be appropriately increased or decreased according to the needs.
(6) Overcooling or overheating will not occur. Compared with the general constant air volume system, the variable air volume air conditioning system with the variable air volume terminal device can more effectively adjust the temperature of the local area, realize the independent temperature control, and avoid the phenomenon of overcooling or overheating in the local area. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of sterile workshops and purification workshops and other supporting services.
(7) The fan power can be greatly reduced during partial load operation. According to theoretical simulation calculations, when the annual average air conditioning load rate is 60%, the variable air volume air conditioning system (variable static pressure method control) can save the fan power more than 50%.
In short, the variable air volume air conditioning system has the advantages of comfort, energy saving, safety and convenience compared with the constant air volume air conditioning system and the fan coil system.
But in the practical application of variable air volume air conditioning system, there are also some shortcomings as follows:
(1) The fresh air volume control requirements are relatively high. The air supply volume of the variable air volume terminal device decreases with the reduction of the load of the air-conditioned room during operation, which will cause the fresh air volume to decrease proportionally with the supply air volume. In the case of a very low load, there may be a serious shortage of fresh air volume. In this case, the control quality of the air-conditioning area deteriorates, so it is necessary to control the small fresh air volume, which also complicates the control device.
(2) When the total air volume of the variable air volume air conditioning system changes with time, the static pressure in the air duct also changes accordingly. Therefore, it is necessary to provide a set of air volume stabilization facilities to offset the interference effect caused by changes in the static pressure of the air duct, which will increase the cost accordingly.
(3) The initial investment of the variable air volume air conditioning system is higher than the air conditioning method of the fan coil unit plus the fresh air system. Compared with the constant air volume system, there are more control links and more complex control systems, and the difficulty of operation and maintenance and maintenance management is correspondingly increased.
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