Evaluating for Power Savings in your Compressor Fleet
Enalysis offers a new and greatly improved user experience allowing customers to better identify, investigate and act on valuable opportunities for...
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Adrian Cowan : May 19, 2020 4:43:07 PM
This post will provide Detechtion Technologies’ recommended steps for troubleshooting Blowby and “Gauge Maintenance”. These two concepts, along with their possible causes, were discussed in detail in E-Tips 1.3 - 1.7.
Blowby is a term used by Detechtion Technologies to quantify inefficiencies in the compression process. Blowby is an indication of the health and efficiency of the valves and piston rings inside every cylinder. In short, it is a measure of the number of molecules of gas that are being re-circulated and recompressed within a cylinder. As more gas is re-circulated and recompressed, the temperature rise across the cylinder increases, more horsepower is required and the cylinder’s capacity to compress gas decreases. The main causes of a Blowby flag on an Enalysis report are:
Gauge Maintenance is the term used by Detechtion Technologies when the monitored compressor parameters are thermodynamically impossible according to the Enalysis software model. This occurs when the calculated expected discharge temperature is greater than the actual measured discharge temperature for a cylinder. On a Blowby trend, Gauge Maintenance presents as negative Blowby. However, while Blowby represents an inefficiency in the compression process, Gauge Maintenance indicates that something is not as expected. The following are the main causes of a Gauge Maintenance flag on an Enalysis report:
Note that some of the causes of Gauge Maintenance can also be causes of Blowby.
It is possible to streamline this troubleshooting through more detailed Enalysis of the variables and trends in the Enalysis report. But first, we need to increase your knowledge of compression. To assist you with this, compression fundamentals will be covered in future E-Tips.
Click here to read Enalysis Tip 1.9 - Compressor Field Data Entry with Fieldlink® now!
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