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  • Users: chadl
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  1. chadl

    How to join 2 well pump pipes?

    Perhaps I am missing something here, but it sounds like you are taking two 10 inch supply lines from your well pumps and combining them into a single 8 inch line to feed your treatment plant. This seems strange as you would typically combine two smaller supply lines into a larger one, not a...
  2. chadl

    Hydrant Flow Test

    I apologize if I missed it, but what size pumps does the city utilize? That can easily set an upper limit to the water supply. Most systems I've seen like this utilize parrell pumps and pressure transducers that activate pumps as pressure drops, either at the outlet of the pump station, or at...
  3. chadl

    Simple Cycle CT power plant water use

    Thanks for the reply guys, The plant is actually located on the east coast of Florida (probably should have mentioned that), so evaporative cooling for inlet air seems unlikely, and would most likely not pull significant amounts of water. I do not see any evidence of cooling towers, so I’m...
  4. chadl

    Preparing for PE Mechanical Exam to Early?

    I personally started about a year before the test. I got a review book from my boss, and started taking it on trips (I work out of town for one or two nights a week), I'd work for an hour hear and there, never really serious until about a 3 months before the test, this worked good for me, an...
  5. chadl

    Please define "small temperature" in regard to HVAC

    Yorkman, I'm not an hvac guy so I could be wrong, but I always thought that approach was more like the inlet coolant temperature and the outlet air temperature (in a typical AC system) ie a good (low approach) gets the air going out as close to the temperature of the coolant coming in. with an...
  6. chadl

    sprinkler protection of steel columns

    NFPA 13 Section 12.3.7.1 details requirements for column protection for class I through Class IV and Plastic Commodities. That section provides several options with the easiest generally being a single sidewall at an elevation of 15 ft. pointed toward one side of the columne. However deluge...
  7. chadl

    Pressure reducing valve working in the oppsite flow direction

    if the valve is internally sensed and it work like you said then why some manufactures provide the check feature as an additional feature if their valves block the flow reversal naturally any way ? Are we talking about check valves in parallel with PRV or in series. In some instances a check...
  8. chadl

    Pressure reducing valve working in the oppsite flow direction

    I believe waseem is talking about Pressure "reducing" valves, not pressure "relief" valves. ie. the sensing line is monitors the downstream pressure, and adjust the valve accordingly to maintain an output pressure. Please correct me if I'm wrong.
  9. chadl

    Simple Cycle CT power plant water use

    My company is working on the design of a fire protection system for a new development located near a 680 megawatt simple cycle power plant. The plant consists of 4 170 megawatt CT's, fueled by natural gas or fuel oil. A flow test was conducted on the water system near the site to determine the...
  10. chadl

    fire flow test

    The type of water system can have a dramatic effect as well, in theory, a completely gravity feed type system should provide similiar results regardless of how much water is flowed during the test, however most systems utilize pumps, either in combination with elevated storage, or in a direct...

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