The air cooler is not performing well
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6X3 tube bundle; the water vapor inside the tubes is at 1.25 MPa (superheated steam at 280 degrees). The capacity is 5 tons, and the temperature is to be reduced to 80 degrees. The design specifies 3 rows of tubes – two rows feeding into one row – resulting in a total of 138 tubes. There are 25 base tubes, with fin outer diameters of 57 mm and a triangular arrangement (spacing of 62 mm). There are 2 fans outside the tubes, each with a diameter of 2.4 meters and an air flow rate of 150,000 m3/h; together they provide an air flow rate of 300,000 cubic meters per hour. The inlet air temperature is 34 degrees (the designed ambient temperature is also 34 degrees). During actual operation, the steam pressure is 1.14 MPa (220 degrees), and the steam volume is 3 tons; the ambient temperature is 29 degrees. In this case, the steam temperature can only be reduced to 101 degrees. I’m not sure why this happens The air volume is measured at around 300,000 cubic meters per hour
Is it a new device? 1: Is it possible that the humidity levels are different? 2: Could there be air inside the coiling tubes (for example, due to incorrect installation or some other reason that causes air to get trapped there), which would reduce the actual heat exchange area? 3: Are the fins on the heat exchange coiling tubes dirty, thereby affecting heat dissipation? 4: Could the design temperature and the type of fluid used be different? I have encountered this situation before. Due to lack of familiarity with the process. The points mentioned above are just casual remarks. It is recommended to create a systematic analysis tree, list all possible factors, and examine them one by one. If it can be confirmed that there is no impact or that positive factors exist, those are ruled out to narrow down the scope of investigation.
Shouldn’t water vapor at 110 degrees Celsius condense at 1.14 Mpa?
I suspect there are non-condensable gases inside; actually, use HTRI to verify it – this configuration is sufficient； Also, the air volume of your fan is definitely incorrect
There are non-condensable gases inside, causing gas resistance