Archive for September, 2009


Hippety hopping across the pond

Sincere apologies for the incoherent, rambling nature of this blog post, which I fully recognize. However, if I were to take the time to fully revise it, I’d get severely behind on blogging, and probably wouldn’t catch up for weeks, so here it is, in all it’s gory unintelligibility. Please do not read if you would like to maintain any respect at all for my command of the English language.

Wow! These last several two weeks have just blurred past, and it defies me meagre capabilities as a writer to fully express the whirlwind that’s been the Marshall Scholars orientation and then settling in to Goodenough College in London. But as is the case with all good bloggers, here’s my ultimately futile attempt:

I arrived in Washington D.C. on Sunday, September 13 for an orientation program put on by the British Council for. For the next three days, the lot of us were whisked around from meetings to minglings, and everything in between. Following, we took a group flight on Virgin Atlantic (with a couple of minor luggage debacles) to London, and had another two days of the same. Unfortunately, despite the many interesting speakers, due to the Chatham House Rule, I am unable to really say much beyond that about them.

However, what I can comment on are my fellow Scholars, without whom the entire experience wouldn’t have been nearly so enjoyable. Naturally, everyone was uniformly “intellectually distinguished” in their respective fields, but much more importantly than that, it appears the selection committee was quite good at picking out really interesting and affable people. Though their biographies on the website were in most cases rather intimidating, in person they were, well, personable. Of course, the five days of forced interaction certainly helped in getting to know people :-P

In any event, for about a week now I’ve now been living at Goodenough College, a charitable trust postgraduate residence hall in London. Classes don’t start at Imperial for another 1.5 weeks, and I’m not allowed into the labs without safety training (also in 1.5 weeks), so that means I’ve had a lot of time on my hands, which I’ve mostly spent exploring London. My feet aren’t particularly happy about it, but walking probably close to 50km since Monday has really helped me get a sense of the city (check out my facebook photos), though I expect that even after spending the year here, they’ll still be places I won’t have ventured. It’s definitely a change from good ol’ Southern Indiana. Well, that’s about it for now; wish me luck!

~William~

This past Winter, one of the ongoing discussions that my housemates and I would have dealt with the amount of money that we were wasting keeping on electric appliances in the house unnecessarily. Everyone knows that keeping the lights on is a waste of money, but exactly how much? At first glance, it seems a simple enough calculation: just multiply the power rating (wattage) by time by cost of electricity and you have a simple answer. However, one factor that would then be missing is the fact that the “wasted” energy of the light bulb goes then to a large extent to heating the house (this is why compact fluorescent bulbs and LEDs are so much more efficient: they don’t generate as much waste heat).

My housemates and I never got around to actually doing the calculations for us in particular, but the question again occurred to me today, so I sat down and did a quick back of the envelope calculation (with extensive use of google and wikipedia). Following:

Cost per Joule of Heat from Electricity

The average residential cost of electricity for 2009 so far is 11.38 cents / kWh (http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_b.html). 1 kWh = 3.6 * 10^6 J. Hence, it costs 3.16111111 * 10^-6 cents / J to heat your house using electricity.

Cost per Joule of Heat from Natural Gas

The average residential cost for natural gas in January 2009 was 12.41 dollars / thousand cubic feet of natural gas (http://tonto.eia.doe.gov/dnav/ng/ng_pri_sum_dcu_nus_m.htm). 1000 ft^3 = 2.83168466 * 10^4 liters.
At STP, 1 mol of gas = 22.4 liters, so 1000 ft^3 = 1264.14494 moles.
Assume that natural gas is 100% methane (not quite true, but close enough).
Heat of combustion for methane: 890 kJ/mol.
Therefore, 1241 cents produces 1125089 kJ of heat
==> 906.598711 kJ / cent
= 906598.711 J / cent
= 1.10302385 * 10^-6 cents / J.

Thus, it costs almost three times as much to heat your house using electricity than natural gas. Of course, this calculation is only partially relevant for such things as light bulbs, Xboxes, computers, etc., because some of the energy is lost (radiation from the house, energy used to send information over wires or the wireless, etc.), but even in the perfectly efficient scenario (which is only likely to occur with space heaters), it’s still considerably cheaper to use natural gas.

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