Tina’s in EnergyTech this Month!

Tooting my own horn, but not really… I’m just in the magazine to introduce the real stars of the show, which are the ASME Combined Cycle Committee and the “Best Paper” from our sessions at the 2014 ASME Power Conference.

The paper is on combined heat and power (CHP) for offshore platforms – and it features a gas turbine combined cycle using CO2 as the working fluid in the bottoming cycle.

The paper can be read in EnergyTech’s April 2015 issue, including online here: http://www.energy-tech.com/steam/article_5fec7e48-d7de-11e4-9022-67f74d448918.html

We expect more exciting and innovative paper presentations at the ASME Power Conference again this year. We’d love for you to join us! More information on the conference is here: http://www.asmeconferences.org/powerenergy2015/index.cfm

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In air conditioning for the LM6000

I decided to clean my office over the weekend, and came across the Power Magazine from June 2013. One of the feature articles is on the ARCTIC inlet conditioning system by Energy Concepts, Kiewit Power Engineers and Nooter/Erikson.

ARCTIC stands for Absorption Refrigeration Cycle Turbine Inlet Conditioning. And that’s precisely what it does.

Designed around the LM6000 (but also available for other engines), the ARCTIC uses heat from the gas turbine exhaust to power an absorption chiller which cools a heat transfer medium for use in the gas turbine inlet. The system can use existing inlet coils, and can also run in heating mode. This is of special interest to the aeroderivative engines, due to their multiple control limits, which cause them to have an optimum compressor inlet temperature (CIT) for best output performance.

The optimum CIT for the LM6000 is between 46F and 49F (and varies between individual units to a small extent). The ARCTIC system can be setup to control the CIT to that optimum temperature, no matter the outside ambients. According to the Power Magazine article, the system can also start and stop automatically with the gas turbine.

With a drop of only 120F in exhaust temperature (for the LM6000, this is from ~840F to ~720F), there is still energy available for other uses from the exhaust gases, including hot water exports or combined cycle operation (which is more likely on frame based units).

Overall, a very intriguing design concept, and if you’re in the market for a new or upgraded inlet chilling system for your gas turbine, definitely worth looking into.

To read more about ARCTIC, view the Power Mag article here: http://www.powermag.com/improving-warm-weather-performance-of-the-lm6000/

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The Dam Site

I hope everyone had a great Independence Day Holiday last week.

Our family took an RV trip over to Port Angeles, WA where we camped next to the former Elwha Dam Site. Yes, I chose a vacation destination based on a power plant location… and my family agreed to join me!

If you’re not familiar with the Elwha restoration project, you can get more details here.

In a nutshell, two power producing dams that were built in the early 1900’s (without following required permit and treaty construction practices) are being removed because, as the BBC put it “Adding new [fish] ladders would have proved prohibitively expensive. And the dams also needed major upgrades because they no longer met modern environmental standards or produced energy at an efficient price.”

Webcams of the area are availablehere

There are also some YouTube videos available of the dam removals:
Elwha Dam Removal process (animation with notes)
Glines Canyon Removal (time-lapse)

The lower dam on the river was only a short walk from our camp site. The construction access road was open for pedestrian traffic, and allowed us to get up close and personal with the top of the valley where the dam used to be. There’s still a big berm covered in burlap waiting to grow new vegetation, which looked very industrial, but the river itself is back rolling through the bottom of the valley, cutting out its new path.

Elwha Dam 2013

During our trip we also attempted to get close to the upper dam site, the Glines Canyon Dam, but it was still undergoing deconstruction, and a wide area around the activities were closed to the public. We were able to have a picnic on the river below the Glines Canyon Dam site where the water was rushing past – looking almost like mud.

Below the Glines Canyon Dam

I posted a few more pictures of the Elwha at the T2E3 Facebook Page.

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Instrumentation Issues

Welcome back! It’s been a while since I’ve posted here. Been buried with client requests… there are worse problems to have, I suppose.

This summer’s focus is INSTRUMENTATION.

I’ll be digging into the instrumentation requirements for combined cycle facilities, looking at what instrumentation you’re likely to have on site, what accuracy and uncertainty you can expect for your key performance indicators (such as GT compressor efficiency, ST sectional efficiencies and overall plant net heat rate), and the cost to add instrumentation – especially those items you very likely don’t currently have (such as an accurate weather station or gas chromatograph).

So… please post any suggestions, comments or questions regarding instrumentation here on this blog entry, or jot me an email direct.

I’d love to hear from you about what your current issues are regarding instrumentation:
* How often do you calibrate devices not required by controls?
* What manual inputs do you make (or try to make) on a regular basis? (i.e. HHV)
* What roadblocks do you run into when trying to add instrumentation?

And check back here for updates. Hopefully more often than once a year!
I hope you all enjoy your summer.
-Tina

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ASME and the decision against the CSAPR

A great synopsis of the ruling that vacated the Cross State Air Polution Rule was given in today’s ASME Capitol Update newsletter – provided here in it’s entirety (other than the author’s email address, which I can provide to you on request):
————
FEDERAL APPEALS COURT VACATES EPA’S CROSS STATE AIR POLLUTION RULE

On August 21st, the U.S. Court of Appeals for the District of Columbia ruled in a 2-1 decision that the Environment Protection Agency (EPA) exceeded its authority in crafting the Cross State Air Pollution Rule (CSAPR). EPA had argued that CSAPR would lead to reductions of nitrogen oxide and sulfur dioxide emissions by more than 50 percent from 2005 levels by 2014. The rule’s challengers argued that the rule would place an undue strain on the country’s electric grid.

In its ruling, the Court found that “although the facts here are complicated, the legal principles that govern this case are straightforward: Absent a claim of constitutional authority (and there is none here), executive agencies may exercise only the authority conferred by statute, and agencies may not transgress statutory limits on that authority.”
“Here, EPA’s Transport Rule exceeds the agency’s statutory authority in two independent respects. First, the statutory text grants EPA authority to require upwind States to reduce only their own significant contributions to a downwind State’s nonattainment. But under the Transport Rule, upwind States may be required to reduce emissions by more than their own significant contributions to a downwind State’s nonattainment. EPA has used the good neighbor provision to impose massive emissions reduction requirements on upwind States without regard to the limits imposed by the statutory text. Whatever its merits, as a policy matter, the EPA’s Transport Rule violates the statute.”

“Second, the Clean Air Act affords States the initial opportunity to implement reductions required by EPA under the good neighbor provision. But here, when EPA quantified States’ good neighbor obligations, it did not allow the States the initial opportunity to implement the required reductions with respect to sources within their borders. Instead, EPA quantified States’ good neighbor obligations and simultaneously set forth EPA-designed Federal Implementation Plans, or FIPs, to implement those obligations at the State level. By doing so, EPA departed from its consistent prior approach to implementing the good neighbor provision and violated the Act.”

“For each of those two independent reasons, EPA’s Transport Rule violates federal law. Therefore, the Rule must be vacated.”
The rule was remanded to EPA to be rewritten.

The 104-page decision may be read at:

http://www.power-eng.com/content/dam/pe/online-articles/documents/2012/08/CSAPR%20Opinion%20copy.pdf

Paul Fakes covers public policy-related energy issues for ASME. He can be reached at xxxxx@asme.org
————
It’s back to the drawing board for the EPA…

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Energy Storage Options

This month’s Electric Light & Power magazine has an interesting article on Energy Storage, starting on page 58. It’s actually an interview with Edwin Feo, the managing partner of USRG Renewable Finance.

One of the points they make, is that fast energy storage can be used for frequency regulation, to reduce the amount of ramping at power plants. I would be curious if anyone has made a study or has the data to support the heat rate impact their plant is seeing due to increased frequency and speed of ramps – such as those seen to balance wind generation.

This would make a great paper for the ASME Power Conference coming up in July 2012.

If you have another idea for a paper, please let me know. I’m the Paper Coordinator for Track 24 (Simple and Combined Cycles) and am actively looking for additional papers (and/or panel ideas) for our sessions. If your idea doesn’t fit Track 24, I can help you get in touch with the right Track Chair as well.

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SW Power Outage

I was surprised to hear of the large power outage across the Southwest last night.

Power was out from Yuma, AZ to San Diego, CA and into parts of Mexico. Approximately 5 million people were in a blackout – which started right around 4pm, in the heat of the afternoon and the start of rush-hour traffic.

According to the news reports and statements from APS, the outage was triggered by a worker who was removing some monitoring equipment at a sub-station in Yuma – the equipment had apparently not been working correctly. It must have been behaving very badly for the utility to send out a worker to remove it during the peak time of a hot summer day. The worst case scenario expected by APS was for a blackout in Yuma, AZ. That the outage spread to San Diego and Mexico was unexpected, and will be the focus of their outage investigation.

Back in 2009, there were talks about upgrading the US Transmission grid. An example of one plan is found at NPR.org. In the picture from NPR, if you click the Proposed Lines “off”, you can see that the San Diego area has only one medium sized transmission line feeding it – coming directly from Yuma, AZ.

Most of the power is back on this morning, and airports are beginning to recover from the disruption. But, maybe it’s time to revisit the idea of upgrading the US transmission grid?

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Room for Solar

The first article I read today was about large scale solar, and the issues around finding enough land. Stepping through a few more items in my inbox, I see this: “A Solar Re-Skin at [The Redskin’s] FedEx Field”
(a month old, but still making the rounds in various newsletters)

I did the economic analysis for residential solar panels a few years ago for a friend who lived in Arizona. At that time – before massive federal incentives – you could break even on installing solar panels on a new house. For a new house, the added capital costs were expected to be approximately $300/month over a 30 year mortgage to cover a $300/month electric bill. So to me, it seems like a no-brainer for new developments to include solar panels by default.

Retrofits like the one being done at the Redskin’s stadium may cost more, but with current incentive programs it can still make economic sense for the owners, and from an image standpoint it’s great marketing.

And if you’re into job creation, the incentive programs for small-scale solar could put a lot of people to work. Here in Washington state, there are additional incentives for solar installations – but the equipment must all be manufactured within the state to get the maximum payback rates. The policy with the incentives was put together as a jobs bill, not an energy bill.

With all the current incentives for solar power, I think it might be worth looking to see if we can find a little bit of room.

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2012 ASME Power Conference

The 2012 ASME Power Conference has been announced, and we’re looking for engineers to participate.

I was lucky enough to be elected as the Combined Cycle Commitee Paper Coordinator for 2012, so if you have any ideas for papers, presentations or panel sessions; I’d love to hear about them! 

You can post ideas here as a comment to this post, or send me a private message directly. Even if your idea does not involve combined cycle equipment, I can point you to the right coordinator to get in touch with.

The 2012 ASME Power Conference will be held in Anaheim, CA July 30-August 3, 2012. The location is sure to have many options for side trips and vacations along the way.

The conference will also be co-located with the 20th International Conference on Nuclear Engineering (ICONE), which should bring a lot of interesting key note speakers and presentations, as well.

For more information on the conference, visit ASME’s Website.

Abstracts for papers are due by November 21, 2011, so there is still time to put your thoughts together.  More information on the publication schedule is also available at the conference website.

Hope to see you all in Anaheim next year!

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