Seeking Alpha

Rick Krementz

Rick Krementz
Send Message
View as an RSS Feed
View Rick Krementz's Comments BY TICKER:
Latest  |  Highest rated
  • Axion Power Concentrator 197: Jan. 13: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    iindelco: Actually, access to salt water does not significantly reduce the cooling system weight. The battery (or engine) coolant liquid is still a non-corrosive anti-freeze. The cool salt water is pumped into a heat exchanger to cool the coolant liquid. The salt water intake is a filtered once through system.

    If you pumped salt water through the BMS (or engine block) one gets serious corrosion problems. Of course, an electric drive system will have much less waste heat than the diesel it replaced, probably in the order of 90% less.
    Jan 13, 2013. 03:24 PM | 6 Likes Like |Link to Comment
  • Axion Power Concentrator 197: Jan. 13: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    The "300 mile" Tesla battery is 85 kwh. If my estimate of 300 kwh is accurate, that is 3.5 times larger. http://bit.ly/VDLvkv discusses 1000 kwh , which would be about 12 times larger. An initial conclusion would be that the ferry weight includes the BMS.

    The ferry is only working for half an hour at 10 - 15 mph. The Tesla "300 mile" battery is working for something like six hours at 50 mph (definitely not at normal Interstate speeds). Moving slowly (10 mph) is much more energy efficient than moving fast.

    We saw what happens to Fiskers when they got wet during Sandy http://fxn.ws/RPjdm1. I hope the ferry does not get a flooded bilge.
    Jan 13, 2013. 03:15 PM | 6 Likes Like |Link to Comment
  • Axion Power Concentrator 197: Jan. 13: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    iindelco - didn't see your link when I wrote my reply at 12:00 pm
    Jan 13, 2013. 12:09 PM | 1 Like Like |Link to Comment
  • Axion Power Concentrator 197: Jan. 13: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    Re: electric ferry http://bit.ly/VDJwMZ

    I think this may be blogosphere hallucinating. While the press release cited is reproduced over hundreds of eco-blogs, there does not seem to be any original material. The page at Siemens appears to have been removed. No information who is going to pay for it.

    Looking at a map http://goo.gl/maps/xE8FQ, Lavik and Oppedal seem to be about 5 miles apart. At 10 mph average speed, a 400kw motor would consume 200kwh per trip, plus hotel loads. Transferring 200 kwh in ten minutes requires 1200 kw of power assuming unrealistic 100% efficiency. I guess a 300 kwh battery bank would be the bare minimum.

    So, for both ends of the route and the boat, about 900 kwh to 1 Mwh total battery requirements. If I was the designer, I think 1.5 Mwh would be a lot more comfortable and robust. You do not want to have the ferry run out of juice mid route because of collision avoidance with a fishing boat or headwinds. 1.5 Mwh @ $1000/kwh is $1.5m, before building a super lightweight aluminum boat.

    Siemens is in the Li space http://bit.ly/TTxPkg, this is most likely the battery system. It can output 8 Mw.

    Obviously no conventional lead acid battery would work. PbC Power Cubes would work for the shore stations, but probably be too heavy for the vessel.

    In short, the project is remotely possible with lotsa OPM (other people's money). I doubt it will happen.
    Jan 13, 2013. 12:00 PM | 12 Likes Like |Link to Comment
  • Axion Power Concentrator 194: Jan. 6: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    Wanna compare operating costs for the EV Spark and the ICE Spark? Go ahead.

    I do not know if the additional EV GVW has caused more suspension, steering, wheel bearing or steering problems. I do not know what the additional weight has done to tire life. I do not know what has been the failure rate of the BMS. I do not know the actual battery life in the GM EV fleet. I do not know if the traction motor has had problems with Minnesota ice, Arizona heat, vibration, and high g-forces. I do not know if there are more "disposable" parts, such as the recently discussed lead AGM battery in the Teslas that apparently need replacing nearly every year.

    Is the actual battery life 100,000 miles? I don't know. I know most Japanese cars go 200,000 without replacing the engine and gas tank. The average US car is over 11 years old, so at a average 12,500 miles per year, the "average average" is 137,500 miles. Can any significant number of EV Sparks even get to 137,500 without a new battery? I do not know.

    As for anecdote, I am in the process of selling a Honda Accord with 93,000 miles. I should get about $11,000. I do know if I was trying to sell this car, but it will have an imminent need for a $10,000 or $20,000 renovation, I won't get anywhere near $11,000.

    So, if you know an authoritative comparison of actual driving costs comparing the EV and ICE Sparks, I'd love to see it. Preferably not put out by GM's marketing department.
    Jan 11, 2013. 05:58 PM | 7 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    48, if you are referring to my post at 10 Jan, 11:33 AM, I wrote "light hybrid" meaning "mild hybrid". My error in being unclear. See http://bit.ly/VYwupS. I definitely did not mean series hybrid.

    If you are referring to my post of 10 Jan, 11:10 AM, I wrote "parallel", thinking of a full hybrid, like a Prius. Parenthetically I was (subconsciously) referring to a series hybrid.

    Sloppy me. Thanks for keeping an eye on my writing.
    Jan 11, 2013. 05:31 PM | 5 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    D-lane: You are right, regen set points can be whatever the engineers decided.

    I tried a very optimistic scenario of a 30 mpg car with 10 gallon tank with 1kw regen coasting 33% of time, 50 mph average speed, at 100% efficiency, and calculated it would only produce 2kwh of power per tank, or 20 cents. You can play around with my assumptions (especially 100% efficient and 33% coasting), but the value seems to low to bother about, except for marketing.
    Jan 11, 2013. 03:27 PM | 4 Likes Like |Link to Comment
  • Axion Power Concentrator 194: Jan. 6: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    jrp3, your response to: "jrp3, do you have ANY documented, legitimate evidence of lower operating costs? Just because you repeat it repeat it repeat it does not make it true." is "should be lower"?
    Jan 11, 2013. 03:27 PM | 4 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    pzatrick, I do see major grid upgrades AND microgrids both contributing to robustness. The challenge with today's grid is bureaucracy, underinvestment, and a stifling / irrational / inconsistent regulatory environment. Grid and microgrid is not an either / or.

    Many parts of the country do not have good resources for microgrids. Much of the country does not have access to piped natural gas, and most of the country has (very) poor wind resources.
    Jan 11, 2013. 08:58 AM | 5 Likes Like |Link to Comment
  • Axion Power Concentrator 194: Jan. 6: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    D-Inv: Folks have been talking about full serial hybrids for decades. The problem has always been the batteries. I don't know, even with PbC, if the storage technology is up to the challenge.
    Jan 10, 2013. 09:45 PM | 3 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    froggey, thanks for the Tesla 12 volt note. Annual battery changes!! Wow, what a hoot. Do we record that as:

    1) Reliability
    2) Supply Chain
    3) Quality
    4) Low Operating Costs
    4) or just Engineering Hubris?
    Jan 10, 2013. 07:00 PM | 4 Likes Like |Link to Comment
  • Understanding Economies Of Scale In Battery And EV Manufacturing [View article]
    The huge problem facing US Social Security is the artificially low retirement age. When SS started, the average male death age was 65. Now the system is expected to support the masses for an additional 20 years.

    I suggest the retirement age for those under 60 should go up one month every year.
    Jan 10, 2013. 03:28 PM | 2 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    sili, I don't either has much trust that the Feds will actually keep the funds discrete. However, the gas taxes are a mixed result today - significant amounts have been diverted to other mass transit projects, yet there is a very large appropriation from general revenue to keep the highway system somewhat maintained. The obvious solution is too stop the subsidies to automobiles and increase gas taxes. The subsidy gives incentive to drive too much - why not, somebody else is paying for it!.

    I think we will see private "micro grids" not as part of a innovative strategy, but as a defense against an increasingly unstable grid. I think we will see developments (commercial and residential) that get a premium tenant because of superior electricity (and Internet).

    Gas turbines tend to get more economic as they get bigger, and concentrated. Four 500MW turbines is a nice cluster. Clusters typically permit most effective use of combined cycle operations - two turbines feeding one large steam turbine, and other variants.
    Jan 10, 2013. 03:23 PM | 6 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    This is similar to most hybrids. A Prius has a 12 volt battery and accessories batteries, and a traction battery at c. 201 v. The high voltage also runs the air conditioner and supplementary heater.
    Jan 10, 2013. 02:23 PM | 7 Likes Like |Link to Comment
  • Axion Power Concentrator 195: Jan. 8: Axion Power Residential Energy Storage Hub Certified To UL, CSA Safety Standards [View instapost]
    It will be interesting to see how well the extra large starter/alternator works as regen. BMW is not adding an additional motor, just enlarging the alternator (for faster recharging) and starter (for the very frequent starts). Combining the units probably has no or minimal weight penalty, so could be effective.

    I still suspect the "regen" will be mostly marketing - the engine itself is a huge resistance between the alt/start and the wheels.
    Jan 10, 2013. 01:16 PM | 5 Likes Like |Link to Comment
COMMENTS STATS
2,811 Comments
2,005 Likes