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Temecula Station - Downs Energy,-BACK ON LINE

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  • Temecula Station - Downs Energy,-BACK ON LINE

    Hello,
    Please be advised that the station on Diaz Road is currently in a state of shutdown due to a cascade of smaller failures that conspired together to cause physical damage to the station Monday morning, October 5.

    The problem began as a failed (intermittently working) high-pressure sensor. This sensor's function is to detect when the CNG storage banks have reached full pressure, and to then shut down the Cryostar high-pressure LNG pump. When this sensor started having problems it caused the pump to run beyond it's intended 4400PSI shutoff setpoint. At about 9:30 Monday morning the pump continued to run causing a high-pressure mechanical safety valve to blow of and vent the excess pressure. Anyone witness to this event would have heard what sounded like an air riffle firing in sequence with the strokes of the production pump. It was *NOT* quiet. The relieved pressure was then sent to the vertical vent stack and would have been visible as a large vapor plume at the top of the upright LNG tank.

    We were alerted to the situation by detectors, unfortunately this had to have been going on for quite a while before it could be detected.

    The construction contractor responsible for the station did find and replace the faulty pressure transducer Monday afternoon. When we put the production pump back online we then discovered that the safety valve had been damaged by the severe abuse and was bypassing more and more LNG as the pressure built up. By 3800PSI that valve was bypassing excessive amounts of high-pressure LNG.

    Yesterday (Tuesday) were were told the valve was removed and taken to LA to be rebuilt. It's now Wednesday, our customers have been without service since Monday morning.

    We are now being told that a temporary valve is being installed at the site this evening between 5 and 6pm. Since it is temporary, we can assume they will shut us down again to install the real valve at some future time.

    Obviously this situation is not consistent with how we wish to accommodate our customer base. Everyone's patience is appreciated while we try to get this fixed as quickly as possible.

    I will try to post back more information as we become aware of it.

    Thank you,
    -James Bertok
    Systems Administrator
    DOWNS ENERGY
    Last edited by James B.; 10-21-2009, 04:54 PM.

  • #2
    Re: Temecula Station - Downs Energy, temporarily closed

    Update 10-8-9:
    The fueling station still shut down as of 10am. The contractor made an attempt to install a temporary relief valve last night but was unsuccessful. Most likely a compatibility problem.
    -James

    Comment


    • #3
      Re: Temecula Station - Downs Energy, temporarily closed

      Thank you for the updates, Jim. Please be sure to make the appropriate notes and status changes at our www.cngprices.com web site. We appreciate your conscientious efforts to keep us all informed... something no other station owner (other than myself) ever does. We appreciate you.

      Comment


      • #4
        Re: Temecula Station - Downs Energy, temporarily closed

        The station is currently open and running as of Tuesday, October 13.

        The replacement valve was installed Friday and production resumed. Unfortunately the station did not keep running over the weekend and had failed out by Saturday evening again. This was discovered and corrected Monday morning at which point production resumed once again.
        We were not sure it would keep running, but at this point the station has been running without intervention for 24 hours. We would like to hope it continues to.

        There is another scheduled shutdown for this Friday, October 16th, 2009.
        We are getting an LNG delivery Friday morning, the CNG production pump has to be disabled during this so that the station can go into "offload mode". The CNG dispenser will still be up and running during this process, but the only product available will be whatever is stored in the CNG tanks at the point of shutdown. Following the offload we have to run the station in another mode that warms up the fuel to increase pressure. This is called "saturation" and has taken up to an hour and a half in the past. We may not be able to resume production of CNG again until as late at 12:00pm, so that means full CNG pressures may not be available until after 1:00pm.

        Thank you,
        -James

        Comment


        • #5
          Re: Temecula Station - Downs Energy, temporarily closed

          I am sorry for your troubles, but I have a question. Does the station have Visa/MC access yet?
          I live nearbye.
          BLUE 09 GX

          Comment


          • #6
            Re: Temecula Station - Downs Energy

            Hello, I'm sorry there is no VISA or MasterCard acceptance yet. It is intended but the station is so unreliable that all of our attention has been focused on trying to keep the heap running.

            That being said, it is broken and shut down again.
            Same problem, it was caught in the act of blissfully and obliviously blowing off LNG again today.

            At this point I can't say what is even going to be done about it.

            This this is so utterly terrible, the best thing for you guys to do will be to call ahead of time to (951)737-9688 and ask one of the girls if it's working. It might save you the trip and/or frustration.

            -James
            Last edited by James B.; 10-21-2009, 04:56 PM.

            Comment


            • #7
              Re: Temecula Station - Downs Energy

              We've been up and running for the last three days now.
              The current status is that all LNG and CNG dispensers are available for use.





              Title Eddited by moderator: Title now BACK ON LINE
              Last edited by Lakewood90712; 10-21-2009, 07:46 PM. Reason: Title change

              Comment


              • #8
                Re: Temecula Station - Downs Energy

                I have an update on our station in Temecula...
                As of mid-March (2011) we are now accepting a few more cards at the dispensers for payment.

                Including the original CFN and Fleetwide it now takes four other networks:

                1. CFN
                2. FleetWide
                3. VISA
                4. MasterCard
                5. Voyager
                6. Wright Express

                (It does not accept American Express or Discover)
                Receipts are also now available at the pump at your option.

                Thanks,
                -James Bertok
                Systems Administator
                DOWNS ENERGY

                Comment


                • #9
                  Re: Temecula Station - Downs Energy

                  Great News. Thanks.

                  Comment


                  • #10
                    Southwest Transportation Agency operates a public CNG station at [COLOR=rgba(0, 0, 0, 0.870588)]16644 S Elm Ave, Caruthers, CA which uses LNG to produce CNG.[/COLOR] Cryostar installed the equipment comprised of a horizontal LNG supply tank, vaporizer, and four CNG storage sphere feeding two dispensers. Present fleet consists of 100 school buses, some of which drive 90 mile routes.

                    http://www.cryostar.com/web/lcng-lng...g-stations.php


                    Southwest operates the first of its kind 15,000 L/CNG fueling station and 16000 sq ft operations and maintenance center. The L/CNG fueling station has allowed the Agency to expand its CNG school bus fleet from the original 10 buses received from the Katz Safe School Bus Program in 1991 to 41 CNG school buses today. The goal of the Agency is to operate a 100% natural gas fleet and the fleet, today is 75% CNG.

                    Site manager says the public may call for the gate code (nights/weekends) and may fuel vehicles using major bank cards when dispensers not in use by the buses. Standard CNG compressors had been in use up until a year ago, but too much oil-carryover or other impurities in the supply gas pipeline were creating maintenance problems for the school bus engines. The problems have gone away by using CNG made from LNG. When CNG fueling had been interrupted in the past due to station not working, buses would refuel about 20 miles away in Lemore or Fresno. Fog is the only reason buses would experience delays now.

                    The LNG is brought in from Wyoming which, according to the below link (page 94) has 25 LNG production facilities:

                    http://www.gladstein.org/pdfs/GNA_Wy...NG_Roadmap.pdf


                    CNG_Caruthers2.jpg CNG_Caruthers0.jpg
                    .

                    Comment


                    • #11
                      Jan 11 2017 - LNG had been converted to CNG for buses at the adjacent City of Tempe bus maintenance facility since it was built a decade ago. A high pressure CNG line has now been run to the adjacent City of Tempe Public Works fuel site property which is equipped with two fast fill pump dispensers:

                      http://www.greenfleetmagazine.com/ch...se-trucks.aspx
                      .

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