How do I size an air receiver tank?

Use V = Q × t × P_atm / (P_max − P_min), where Q is air demand (L/s), t is acceptable time between compressor cycles (s), P_atm is atmospheric pressure, P_max is cut-out pressure, and P_min is cut-in pressure.

What is the rule of thumb for air receiver sizing?

A common rule of thumb is 3–5 gallons of receiver per CFM of compressor output, or roughly 10–20 liters per L/s. This provides a buffer for short-term demand peaks.

What is cut-in and cut-out pressure?

Cut-out pressure is the maximum pressure at which the compressor stops. Cut-in pressure is the minimum pressure at which it restarts. The difference (P_max − P_min) is the pressure band, typically 1–2 bar.

Why do I need an air receiver?

Air receivers smooth out pulsations from the compressor, store energy for peak demands, allow condensate to drop out, reduce compressor cycling, and act as a buffer between supply and demand.

Can I use multiple air receivers?

Yes, using a wet receiver (before dryer) and dry receiver (after dryer) is a best practice. The wet receiver handles pulsations and condensate, while the dry receiver provides clean, dry air storage close to the demand.

免費工程工具 — #144

空氣接收罐體積計算器

根據壓縮機輸出、啟動/停止壓力及需求時間，確定所需的空氣接收槽尺寸。

V = Q×t×P_atm / (P_max − P_min) 公升與加侖

結果

所需接收槽體積

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儲存能量（自由空氣）

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壓力帶 ΔP

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空氣需求（自由空氣）

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接收槽體積公式

V — 接收槽體積（公升）
Q — 空氣需求（大氣壓力下的 L/s）
t — 允許降壓時間（秒）
P_atm — 大氣壓力（1.013 bar abs）
P_max — 停止壓力（bar gauge）
P_min — 啟動壓力（bar gauge）

範例 — 中型車間

已知： Q = 15 L/s, t = 30 s, P_max = 8 bar, P_min = 6 bar

V = 15 × 30 × 1.013 / (8 − 6) = 227.9 公升

選擇標準 250 L 接收槽。

⚠️ 注意： 始終向上取整至下一個標準槽體積。考慮增加 10–20% 餘量以備未來擴充。

空氣接收槽體積計算器 | 免費線上工具

結果

接收槽體積公式

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