Dogecoin future forecast accuracy14 comments
Bot addmefast firefox bit download
The boiling point is different because the atmospheric pressure pushing down on the water in Denver is less than at sea level, which allows the liquid to convert to vapor at a lower temperature.
When liquid is boiling in a cooking pot we call it "dinner". When the liquid ring in a pump starts to boil, we call it "cavitation". Much like the pot of water example, cavitation in a liquid ring pump is caused when the operating pressure of the liquid ring reaches the vapor pressure of that liquid. This causes some of the liquid to become vapor, forming bubbles that travel around with the liquid ring. As these bubbles travel inside the pump they collapse, or implode, and can break off pieces of the pump.
These pieces travel with the liquid ring and cause further damage through erosion. The answer is more complicated than you might think. Cavitation is a function of both temperature and pressure.
The lower the operating temperature of the liquid ring, the lower the potential for cavitation. However, if the operating pressure of the pump is close to the vapor pressure of the ring liquid at the operating temperature, cavitation can still occur. In cavitation prone operations, like condenser vacuum pump duty, it is a good idea to periodically record the temperature of the seal liquid supply and discharge. Increases in temperature can indicate the need for a checkup, and trending them over time will allow you to schedule preventative maintenance before reliability is affected.
With the changes in the power industry, some plants with no history of cavitation with their condenser vacuum pumps may suddenly start to have problems. Why would this happen? With more renewable power available, power plants that previously ran at full load now find themselves having to turn down their generation capability to provide only enough power to "fill in the cracks" on the power grid. At reduced load, the turbine main condenser will operate at a lower pressure than it did at full load.
Since turbine condensers operate at the saturation temperature, the lower operating pressure means the vapor pressure of the liquid ring will be closer to the saturation temperature at the operating pressure. This is a recipe for cavitation in 'unhealthy' vacuum systems. At Nash, we have always taken special care to minimize the potential for cavitation when designing our systems. We have seen the industry trend toward operating the vacuum equipment at conditions more prone to cavitation, and we have challenged our engineers to develop methods to further reduce the potential for cavitation in our liquid ring pumps.
The new design doubles the useful life of a pump operating under conditions prone to cavitation without impacting power or performance, and is available on new models and as an aftermarket upgrade.
If your power plant is being asked to run at low loads or if you have had a history of cavitation in your liquid ring pumps, you may be at risk for cavitation damage. Contact Nash before performance and reliability become an issue. We can discuss your options for preventative maintenance, and upgrades that will help you avoid downtime and costly repairs. Want to learn more about preventing and identifying cavitation in your liquid ring vacuum systems?
Contact Nash today to schedule a short, informative webinar. Whether you are a submarine captain or a maintenance manager, it is not something you want to hear. Cavitation damage in a liquid ring pump What is cavitation?
How does cavitation cause damage? What can we do to avoid cavitation in a liquid ring vacuum pump? Learn more about the TC Anti-Cavitation Upgrade Want to learn more about preventing and identifying cavitation in your liquid ring vacuum systems?