Message-ID: <18699250.1075860884902.JavaMail.evans@thyme> Date: Fri, 1 Mar 2002 05:55:02 -0800 (PST) From: ron.matthews@enron.com To: eric.gadd@enron.com, kevin.hyatt@enron.com Subject: RE: Sun Devil - ambient temperature affect on pipeline capacity Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-From: Matthews, Ron X-To: Gadd, Eric , Hyatt, Kevin X-cc: X-bcc: X-Folder: \Kevin_Hyatt_Mar2002\Hyatt, Kevin\Projects\Sun Devil X-Origin: Hyatt-K X-FileName: khyatt (Non-Privileged).pst Eric, What we have done was use meteorological data from the internet but have fo= und that to be incorrect for remote locations. The internet in some places= reads low compared to the actuals at the stations. I try to go by what th= e locals have versus the internet. I think the internet data is more of an= average versus the spots throughout the day even though they call them dai= ly highs. Go example is Station #1 were the internet data is about 5 - 8 d= egrees low compared to actuals at the station. Same is with San Juan were = I have seen temperatures in the summer hit high temps as early as 9:00 a.m.= Other factors to consider is not only the ambient temps but what the comp= ressor unit can stand (ie; shutdowns or limit switches). If the nightly ex= haust temperature does not cool down enough at Bloomfield, the unit can be = limited in power as early as 8:00 a.m. when it reaches 1400 F. It appears = that thre is plenty of power left to run but the unit can't get there. I h= ave seen power levels peak at 4000 Hp when the unit is site rated at 4500 H= p. =20 As time goes on, I'll either help you understand more or confuse you. Let = me know which direction I'm headed from time to time. You can't hurt my fe= elings. I'm copying Kevin to keep him up to speed. Planning is not an exa= ct science but we use experience and whatever REAL data is available.=20 Ron M. -----Original Message----- From: =09Gadd, Eric =20 Sent:=09Thursday, February 28, 2002 10:06 AM To:=09Matthews, Ron Subject:=09RE: Sun Devil - ambient temperature affect on pipeline capacity Ron,=20 Yes, thanks very much. I'm trying to move up the pipeline engineering + de= sign learning curve. =20 I get the impression that having different design basis conditions for each= compressor station introduces a lot of complexity for calculating interrup= tible capacity arising from lower ambient temperatures. It might be 75 deg= rees at one station and 95 degrees at another, which would act as a bottlen= eck. Do we meteorological data for each station? =20 -----Original Message----- From: =09Matthews, Ron =20 Sent:=09Thursday, February 28, 2002 9:54 AM To:=09Gadd, Eric; Eisenstein, Arnold L. Subject:=09RE: Sun Devil - ambient temperature affect on pipeline capacity Each station has a different temperature based on location and elevation. = Station #2 is far less than Station #1 based on elevation. Station #1 is 9= 5 F and Station #2 is 90 F. Station #2 is over 7000 feet while Station #1 = is around 5000 feet. The drop is quick because Needles is around 500 feet.= There is a 2000 feet swing between stations starting from Station #4 west= . =20 Does this help? Ron M. -----Original Message----- From: =09Gadd, Eric =20 Sent:=09Thursday, February 28, 2002 9:32 AM To:=09Eisenstein, Arnold L. Cc:=09Matthews, Ron Subject:=09RE: Sun Devil - ambient temperature affect on pipeline capacity Was I correct on the 95 degree F set point? -----Original Message----- From: =09Eisenstein, Arnold L. =20 Sent:=09Thursday, February 28, 2002 9:22 AM To:=09Gadd, Eric Cc:=09Matthews, Ron Subject:=09RE: Sun Devil - ambient temperature affect on pipeline capacity in general you have an additional 3% HP available for every 10 deg F below = 95 deg at each station. During the summer Stations 1, 3, and 4 are already= at MAOP and would not matter. At station 2 the 10 deg would gain 5 mmscfd= to Phoenix and mayby 3 mmscfd to Ca. We will have run additional models = to verify offcases. Arnold Eisenstein tel: 713-345-3666 (new) fax: 713-646-7522 e-mail: arnold.l.eisenstein@enron.com -----Original Message----- From: =09Gadd, Eric =20 Sent:=09Wednesday, February 27, 2002 9:34 AM To:=09Eisenstein, Arnold L. Subject:=09Sun Devil - ambient temperature affect on pipeline capacity Arnold, I understand that pipeline design is based on hot (95 degrees F) ambient te= mperature conditions. Is this true? If so, assuming a normal weather patt= ern, how much additional capacity is "created" when temperature conditions = are off design basis? I'd like to quantify the potential upside assuming t= hat this incremental capacity would be available for interruptible transpor= tation sales.