Fwy 113

Be professional

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Source of the second pic: NASA

Mital, Subodh K., et al. "Review of current state of the art and key design issues with potential solutions for liquid hydrogen cryogenic storage tank structures for aircraft applications." Aerospace Engineering Papers, NASA(2006).

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What is the energy density and specific energy of LH2 compared to kerosene?

Assume the energy density (kJ/m^3) and specific energy (kJ/kg) of kerosene is 1.0.

Then the energy density of LH2 is 0.25, the specific energy of LH2 is 2.78.

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Supporting details:

Kerosene Energy density: 33 MJ/L (Source: Wikipedia https://en.wikipedia.org/wiki/Energy_density)

Kerosene Specific energy: LHV=43.1MJ/kg, HHV=46.2MJ/kg (Source: Wikepedia"kerosene" http://en.wikipedia.org/wiki/Kerosene )

LH2 Energy density: 8.49 MJ/L (Source: Wikipedia https://en.wikipedia.org/wiki/Energy_density)

LH2 Specific energy: 120MJ/kg (Source: Nojoumi, H., I. Dincer, and G. F. Naterer. "Greenhouse gas emissions assessment of hydrogen and kerosene-fueled aircraft propulsion." international journal of hydrogen energy 34.3 (2009): 1363-1369.)

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Greatest Excel shortcuts list

http://exceljet.net/keyboard-shortcuts

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Boeing's Phantom Eye

Video of its second flight: http://bcove.me/pdqzchet

Phantom Eye's wingspan is 150ft (46m).

It's designed to fly at 65,000ft and fly for 4 days.

It's capable of carrying 450 pounds payload. Only three me?!

Its taxi test on Feb. 6, 2013: http://boeing.mediaroom.com/index.php?s=43&item=2585

Its second flight on Feb. 26, 2013: http://boeing.mediaroom.com/index.php?s=43&item=2604

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Boeing's small manned H2 aircraft

http://www.boeing.com/news/releases/2008/q2/080403a_nr.html

It is not named yet.

It flew in Spain in 2008. It went to an altitude of 1000m and cruised at 100km/h (an aircraft this slow?)

It's powered by PEM FC and Li-ion battery combined. More precisely, it used both power sources when climbing and PEM FC solely when cruising.

"Boeing does not envision that fuel cells will ever provide primary power for large passenger airplanes, but the company will continue to investigate their potential, as well as other sustainable alternative fuel and energy sources that improve environmental performance."

A video for that craft: http://www.youtube.com/watch?v=hf8UyTAmE6o

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Boeing's X-51

http://www.fastcoexist.com/1680362/a-hydrogen-powered-plane-that-could-go-from-los-angeles-to-new-york-city-in-under-an-hour

3600mph, 3 times the speed of Concorde, ~4.7 Mach. LA-NY 1hr.

It can go up to Mach 6.

It's a military instrument, anyway. I would prefer to describe it as a missile, rather than an aircraft.

More facts: http://www.af.mil/information/factsheets/factsheet.asp?fsID=17986

BTW, Edwards Air Force Base is so close to LA. I never knew that.

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hell mtc online application page

http://jobs.mtc.ca.gov/InternshipOpportunities/jobinternship.html

Why it keeps warning me that I didn't fill out contact info when I absolutely filled all the required fields?!

I've got to write to them about this.

- yeah i wrote to the intern coordinator.

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Excel: find duplicates in two lists

(Works in only excel 2007 or above)

Select cells in both lists (select first list, then hold CTRL key and then select the second)

Go to Conditional Formatting > Highlight Cells Rules > Duplicate Values

Press ok.

From: http://chandoo.org/wp/2010/07/01/compare-lists-excel-tip/

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Career opportunities

Today I had a talk with Yunshi about intern and career opportunities, mostly in China.

In the short term, for internships in the coming summer:

ICCT. It is close, it has abundant funding, and it has many ITS-Davis people there.

Detroit: GM/Ford. They may have summer internship programs. But it'll be required to work in Detroit.

Tesla: This sounds so exciting! And it's in California. Tesla is trying to get to China, possibly there is job in the future.

For job opportunities in the future:

Tesla: as mentioned before.

Energy Foundation: it's a foundation founded by somebody. Energy policy analysis jobs may be found there. It has office in BJ.

Shell: it's working on new energies. and it has office in bj too.

Other car or energy companies.

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AeroVironment Global Observer

In addition to Boeing, another US company called AeroVironment has also developed H2-fueled drone, named Global Observer.

This drone is claimed to provide satellite-similar services at a much lower cost. Its first flight in Jan 2011 lasted 4 hours and reached a 5000-feet (~1500m) altitude above sea level. The Global Observer is designed to operate at 55,000 to 65,000 feet (17,000-20,000m), above weather and other conventional airplanes. For now, this plane seems to be military use only.

News link:http://www.avinc.com/resources/press_release/global_observer_aerovironments_extreme_endurance_unmanned_aircraft_system_a

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"Hydrogen aircraft" at H2-Vehicles.com

http://www.h2-vehicles.com/hydrogen-aircraft.htm

This webpage does not contain much concrete info on research work, but gives some directions to look for, e.g. Cryoplane, Boeing+NASA+US military; surprisingly, there is a CA company called AeroVironment that does H2 aircraft.

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Seen from the wikipedia page for hydrogen-powered aircraft, some early tries had already been made in the 20th century, by some Russian and American companies.

So what I should now? Look at all of them?

Maybe start with the newest ones? Will I have time to read all citations on the wiki article?

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Sources to rely on when doing serious researches

Don't use Wikipedia, CNN, or merely first few items from Google! They are good materials to start with when you have totally no idea of your subject, but are not what you want to cite in your paper.

Journal articles are peer-reviewed, others are not guaranteed.

Search the author for further.

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H2 used in aircraft tech. -- presentation by Lennie Klebanoff from Sandia National Lab

Air traffic is growing 5% annually. China 7.5%.

LH2 is 2.8x specific energy (J/kg) that of Jet A fuel. However, its volumetric energy density is only 1/4 of Jet A.

Solid-state storage, high-pressure tanks are not suitable for storing H2 as a primary aviation fuel due to weight, volume inefficiencies. => LH2

Energy per seat mile: LH2 is 0.89 times of Jet A.

What is Ram Air Turbine (RAT)???

Boeing is interested in introducing H2 to aviation.

Is there a motivation to use LH2 instead of kerosene? I mean economically, when we still still consider CO2 emission as an externality?

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What I'm up to

Technology Assessment of Liquid Hydrogen for Aircraft.

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High-speed rail: the wrong road for America?

High-Speed Rail: The Wrong Road for America is an article by Randal O'Toole published on Policy Analysis in Oct 2008.

This article attacks the HSR proposals in various parts of US including California, Florida, and Midwest. Arguments included:

Huge amount of public money to build infrastructure.

Infrastructure requires expensive maintenance every ~30 years.

Not welcomed by freight rails, which are not interested in high speed.

HSR is less cost-effective compared to building new freeways (freeway lanes).

HSR goes downtown to downtown; however not many people live or work downtown.

HSR will not significantly reduce car traffic much. No major LOS change on the freeways.

HSR produce more NOx pollution than it takes off from roads.

Cars are getting more efficient

In-state air travel will be almost killed

More difficult to update to newer, more efficient technologies

Ridership may be lower than the optimistic projection

Pitfalls of mega projects: require long-term forcasting

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CA's Clean Vehicle Rebate Program

Eligibility: -New -BEV, PHEV, FCV (what models are available on market? how much?) -Purchased later than 3/5/2010 -GVWR (gross vehicle weight rating) < 8500lbs (~3855kg) -Only ARB certified ones

In customers' shoes: Is it a real incentive?

In government's shoes: Where does the money come from?