We currently operate 4 ABB HRSGs in combined cycle orientation. On one of the four HRSGs the stack temperature is around 60 degrees higher than the average of the other three. What would be some of the causes for this? What should I look into in getting the heat transfer across the boiler...
I am looking for a device sensitive enough to measure the Harmonic noise index on a GE 7FA generator. We usually hire GE to come onsite to perform a test to determine if the core of the geneerator is loose which may require belly bands to prevent key bar rattle. Does anyone have any experience...
We had a tube leak in the LP Evaporator section of the HRSG. I know the pressure and temperature in that section. I also know the size of the tube leak. (lbs/hr) How can I calculate a btu loss from the leak that I can use to show an adjustment to our heat rate? Basically I just put Fuel...
I am trying to calculate the efficiency losses directly attributed to High Backpressure on the steam turbine due to an air in leak on the rupture disk. Can anyone help me out with a calc to perform, I want to see what the heat rate loss is and try to put a dollar figure on it.
Also I want to...
We had a small glycol leak into the condensate system at the plant. The condensate is controlled around 9.0 pH and is demineralized water. My question is on the chemical reaction between the glycol and the 9.0 pH demineralized water. It caused the conductivity to increase well out of our...
Here at the plant on our Circulator Pumps we have booster pumps that use circ water for cooling and lubrication. Unfortunetly the booster pumps fail often due to the low pH of our Circ Water. New pumps have been order to correct issues we have had with old pumps. My question is I am trying to...
Can someone do a check on my calculation:
I am trying to convert 1000 MBs/Hour to SCFM
I am using 1.034 MBs/MCF
So 1000 (MBs/Hour) / 1.034 (MBs/MCF) = 967 (MCF/Hour)
967 (MCF/Hour) * 1000 (SCF/MCF) = 967000 (SCFM/Hour)
967000(SCFM/Hour) / 60 (Minutes/Hour) = 16116 SCFM
Does this...
How much of an increase can you expect (ballpark) from inserting turbulators into an existing shell and tube heat exchanger? Existing heater is 10.92 MMBtu/hr. Tube side is feedwater shell side is natural gas.
Curently fuel gas entering our gas preheater is at 170 deg F. The gas is raised to that temperature from a gas compressor. The gas leaving the preheater (shell and tube heat exchanger) is at around 370 deg F. We are trying to find a way to get away from the compressors because of the...
Can someone quantify entropy for me? I am having a hard time putting the theory of entropy to something real. Can anyone explain this concept to me using a real life example, possibly a heat transfer situation?
On a turbine driven boiler feed pump what is the function of a balancing drum with a balancing disk? on prints it shows a balancing drum leak off line that goes back to the pumps suction...
can anyone provide some expertise?
I am studying the difference between natural and forced circulation in large boilers from generating fascilities. I have been reading the requirements for natural circulation and am a bit confused to why certain boilers require boiler circ pumps that seem to meet the requiremnts for natural...
I am currently in the process of setting up a chemical hygiene plan for a new plant. Can someone provide a link of possibly a basic guidline for setting one up? Not exactly sure what is required to be in there...
Looking for a standard procedure to do a boiler hydro on a small package boiler, safeties lift at 200 and 205 psi. Does anyone have a basic generic procedure or possibly a specfic one that I can modify?
We have a Holtec condenser, it is a single shell double tube pass dearating condenser. Here are some of its specs
Number of Tubes 14,520
Tube Length 36’
Tube OD 1.125”
Cooling Water Flow Rate 133,730 gpm
Duty Rating 1067 MMBTU/hr
My question is I am trying to create some trends to track...
At my current plant we treat our cooling tower basins with chlorine dioxide. During the shoulder months when the plant isn't being dispathced we still feed the clorine dioxide once a day untill we reach a level of 600 ORP. Unfortunetly when the plant is down and we have no need for make-up...
I understand the simple inches per second measurement, but what exactly is a Mill? I am talking axial vibration of a shaft. What does a Mill stand for? Millimeters per second? Thanks for your help in advance folks...
