- LỌC MÁY KHÍ NÉN
- MÁY SẤY KHÍ
- MÁY NÉN KHÍ
- MÁY TẠO KHÍ NITO
- BÔ TRAO ĐỔI NHIỆT
- NHỚT MÁY KHÍ NÉN
- PHỤ TÙNG DỊCH VỤ
- THIẾT BỊ PHỤ TRỢ
- LỌC PHÒNG SẠCH
- MÁY NÉN KHÍ
Thể Tích Bình Chứa Khí Nén Được Thể Hiện Qua Công Thức : t = V (p1 - p2) / C pa (1) Với: V = thể tích của bình chứa (cu ft) t = thời gian từ nơi áp suất cao xuống nơi áp suất thấp của bình chứa. C = Lưu lượng của máy nén khí (SCFM) pa = Áp suất khí quyển (14.7 psia) p1 = Áp suất cao nén vào bình chứa (psia) p2 = Áp suất thấp nén vào bình chứa (psia)
Thể Tích Bình Chứa Khí Nén Được Thể Hiện Qua Công Thức :
An air receiver is essential to every compressed air system to act as a buffer and a storage medium between the compressor and the consumption system. There are in principal two different air receivers in a compressed air system:
The maximum capacity of the compressor in a well designed systems always exceed the maximum mean air consumption of the system (maximum mean air consumption is the mean air consumption over some reasonable time).
Since the maximum capacity of an air compressor also always exceed the minimum air consumption in the system - the compressor must modulate its capacity during normal work, often by using primitive strategies as on/off modulating or more advanced strategies as frequency drives and inverters. Primitive modulating strategies cause more pressure variations in compressed air systems than more advanced strategies.
In addition, the air consumption vary due to the process supported. In shorter periods the demand for compressed air may even exceed the maximum capacity of the compressor. In fact, it is common in well designed systems not to design the compressor for the maximum peek loads.
Air receivers in compressed air systems serves the important purposes of
In addition the receiver serve the purpose of
Sizing the Air Receiver
The air receiver must in general be sized according
In general it is possible to calculate the maximum consumption in the system by summarizing the demand of each consumer. The summarized consumption must be multiplied with a
depending on the system. In practice it is common that the manufacturer use standardized receivers for specific compressor models based on their know-how.
For calculating the receiver, note that it is necessary with a pressure band for the receiver to be effective. If the consumption process requires 100 psig and the compressor is set to 100 psig, there is no storage and no buffer. Any increased demand makes a pressure drop below 100 psig until the compressor controls respond by increasing the volume compressed.
If the compressors operates at 110 psig the difference between 110 psig and 100 psig accounts for the air stored in the receiver. If the demand increase, the pressure can drop 10 psig before the minimum requirement is met. Pressure and flow controllers can be used after the receiver for stabilizing downstream pressure to 100 psig and flattening demand peaks. Note that in a compressed air system the pipe work also makes the purpose of a buffered volume.
The receiver volume may be calculated with the formula
It is also common to size receivers
Note! Receivers of unsound or questionable constructions may be very dangerous.
Air Receivers Capacities