Seeking advice on the thermal calculation issues in the design of shell-and-tube heat exchangers
Thread Content
I. Gas flow rate: 100 Nm3/min. Medium: compressed air (wet air). Inlet pressure: 7 barg, temperature: 110°C. The dew point of the inlet wet air is 50°C (with 10.54 g/Nm3 of water content); the desired outlet temperature is 38°C. The cooling medium is circulating water at 32°C at the inlet and 4 barg in pressure, with a temperature rise of 8°C assumed. What is the flow rate of cooling water required, and the flow rate of process condensate? Could you provide the main calculation steps? Any other tips regarding considerations in heat exchanger design? II. Additionally: It is now known the inlet and outlet flow rates, pressure, and temperature of air in the gas-water heat exchanger (shell-and-tube type), as well as the inlet and outlet temperature and pressure of the cooling water. There is no cooling water flow meter on site; can the cooling water flow be calculated? Is it theoretically feasible to calculate the cooling water flow rate using the first law of thermodynamics? Has anyone actually done this?
Is no one going to answer? I’d appreciate it if everyone could give me some feedback on the calculations I’ve done
Is there no one to answer? I’d appreciate it if everyone could give me some feedback on the calculations I’ve done. I got 18 t/h as the result; the steps are in the attachment