I would like to ask about the conversion between standard conditions and operating conditions, as well as the impact of dust content in flue gas on flue gas waste heat recovery!

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Hello everyone. I am currently working on converting values between operating conditions and standard conditions. From what I’ve read, it’s possible to use the equation PV=NRT; specifically, P_std * V_std / T_std = P_operating * V_operating / T_operating. However, I have two sets of data available. The first set shows: operating condition flow rate at 240,000 m3/h, standard condition flow rate at 130,000 Nm3/h, fan outlet temperature at 140–150°C, and fan outlet pressure at 8.6 KPa. The second set provides: operating condition flow rate at 500,000 m3/h, and standard condition flow rate at 245,600 Nm3/h. I’m very curious about how these standard condition flow rates were calculated. Using the formula mentioned earlier, the first standard condition flow rate should be around 160,000, but there’s no information regarding pressure for that case. How are the standard conditions determined? Please help me out. Thank you!