Showing posts with label passive solar heating. Show all posts
Showing posts with label passive solar heating. Show all posts

Thursday, February 20, 2014

Survival Tip #1: Know the Sun for Navigation and Life


To give this blog more practical aspects, I will periodically include survival tips within my entries, beginning with this one.



This morning, I awoke just in time for a glorious sunrise over the rolling prairie out my east-facing window; the landscape cast in pink and purple and blue, interrupted by a few shining white lights of a distant semi-truck rumbling over a distant highway. Now the sun streams in, gives light to the room, and fuel to the lettuce which grows in plastic clamshell containers in the windowsill.

The sun gives many things, including direction for navigation. Although we have all heard vague statements about using the sun as a compass, I recently learned how to use it effectively (combined with an analog wristwatch), thanks to a promotional mailing from Backpacker magazine. (I subsequently found that this technique is described in many places, including Bradford Angier's How to Stay Alive in the Woods, and various youtube videos.)






How to use a dial watch for a compass
 

Point the hour hand of the watch at the sun. Halfway between the hour hand and the number 12 is south. Before noon, move in a clockwise direction from the hour hand to find said halfway point. After noon, move from the hour hand towards twelve in a counterclockwise direction. Once south is found, the other directions follow. North is directly opposite to south. When facing north, west is on the left, east on the right (spelling “we” on a compass.) At twelve noon, the hour hand points directly south (or close to it). This entire technique gives approximate, not precise, directions, because our clocks are not perfectly coordinated with the sun (because of standard time, explained below.)



I am in the growing minority of people who wear analog watches on the wrist. But if your clock is a mobile phone or a digital watch, you're still not stuck. You can draw a traditional clock (in the soil with a stick if necessary) with hour hand pointing at the sun, and employ the same technique as listed above. Or you can use another available dial as a makeshift clock (as Dave Canterbury did in the "Split Up" episode of the television show Dual Survival, using his digital watch and the pressure gauge from his parachute.) Of course, exercise caution when looking at the sun!


On my past several hikes, I have applied the watch-as-compass technique, and quickly became confident enough to keep my magnetic compass hidden in my jacket pocket, while watch and sun (plus map) showed me direction. In so doing, I discovered a remarkable added benefit—I was tracking the sun in ways that I hadn't before. I developed an awareness of its daily trek across the sky, the tiniest hint of the awareness known by the ancient peoples who built the great houses of Chaco Culture National Historical Park, and calibrated their structures to the seasonal movements of the sun and moon and stars.

For most of human prehistory and history, people have turned to the heavens for navigation and the keeping of time. Many American Indians use the term “with the sun” where I use the term “clockwise”—for the sun moves clockwise on its daily trek from east to south to west. The television series Longitude (based on the book by Dava Sobel) informed me that the original purpose for the invention of the watch was navigation at sea, with the difference between time on the ship and time at the home port being key to determining longtitude. As Sobel describes it: “Every day at sea, when the navigator resets his ship's clock to local noon when the sun reaches its highest point in the sky, and then consults the home port clock, every hour's discrepancy between them translates into another fifteen degrees of longitude.”

Radiolab's Time episode informed me that, in the United States in 1850, time varied in every location, based on the sun. Every town had its own twelve noon, based on when the sun reached its daily zenith. (Additionally, there was no single official clock, and so one person's 9:00 was as valid as the next one's 9:20.) Railroads pushed to make time become standardized, because different clocks led to missed trains. Some towns protested standard time, seeing it as a threat to individual identity. But the railroads won out. Eventually, the Standard Time Act of 1918 made standardized time and timezones the law of the land. Since then, the average American has become more estranged from the sun, as its necessity for timekeeping and navigation has diminished.

And yet, we would be wise to reconnect with Father Sun. For a greener and more sustainable world, it is essential. The Homestead at Denison University introduced me to passive solar building design: the south-facing windows of my old Cabin One trap sunlight in the winter to warm the structure. In the summer, the sun makes a higher arc, and its rays shine through the windows less directly. Similar windows are employed in the strawbale Cabin Bob and earthship Cabin Pheonix, and the superb insulation of straw and soil keeps the structures warm in the winter, cool in the summer. All Homestead buildings face south, the direction of maximum sunlight, and capitalize on some form of passive solar design for winter heat. Sadly, most buildings in America do not. Passive solar could keep millions on barrells of oil in the ground, reduce global warming, and save on costs. And it is but one example of the wonders we will achieve, if we come to know the sun. 



Tuesday, March 22, 2011

Dangers from nuke and sewer; wiser approaches

For this drawing, I took some influence from Japanese giant monster movies.

The nuclear situation in Japan remains frightening, as does the threat of a similar event in the US. The bone-chilling guitar riff from Black Sabbath's “Electric Funeral” plays repeatedly in my head.

Since my previous post, I have learned some new things about our unsafe reactors. According to Dr. Ira Helfand, The U.S. nuclear plant most vulnerable to earthquake damage is not in California, but Indian Point, 27 miles north of New York City—with a population of over 20 million within a 50 mile radius. Where or how that population could evacuate in a meltdown crisis is an open question. For more on nuclear power and why it is not good energy policy, consult this thoroughly-researched blog by the U.S. PIRGs.

Meanwhile, wind farms in Japan were unscathed by the earthquake. Remarkable.

Tectonic and climactic forces have ravaged our cities multiple times in recent years. And repeatedly demonstrated our unpreparedness for such events.

I have experienced the destructive power of weather firsthand. In 2008, I lived on Galveston Island, Texas, and worked for an environmental education organization there. In September, Hurricane Ike struck. Prior to the storm's arrival, I evacuated to a Houston. I and several other employees and relatives of the director rode it out in an upper floor apartment. I spent the day before the storm frantically gathering and preparing all the supplies I could—gasoline, batteries, emergency phone charger, radio, water, more water, canned food, rubber boots, etc. The night of the storm, I was alternately asleep and awake, as I listened to wind and rain pummel the building—first from one side, then the other. The sturdy brick structure absorbed the weather's assault. The next day, we were without electricity. The building quickly overheated, being designed for air conditioning. Neighbors gathered for a grill-fest of the meat in their fridges—we had to eat it before the bacteria set to work seriously on that task, making the stuff foul-smelling and unpalatable. We gathered around battery-powered radios and listened to weather updates (and audiobooks). I stood in a long line to collect my allocated food and water from FEMA. Driving in Houston became even more hazardous than usual, in the absence of functional traffic lights.

I returned to Galveston after the storm, to move myself out, and to help the organization recover. I found a devastated island. I learned about the dangers brought on by a storm surge.

An excerpt from an email that I sent to friends about the situation on September 26, 2008 (slightly edited):

“I have made my exit from Galveston Texas. I hid safely in Houston during the storm, and my second-floor apartment back on the island was remarkably undamaged. I lost amazingly little property in the storm, only some books that were at the office. The office was not so lucky as my place. The office is located on the ground-floor, but near the highest street on the island. Even so, the storm surge flooded the building up to four feet. Computers, microscopes, binoculars, slide-projectors, many books, and cabinet drawers full of essential grant papers were waterlogged, went swimming, or were overgrown with mold. And this was no ordinary water filling the office. When the water level riseth, the sewer overfloweth. My last day with the organization was spent clearing and cleaning the toxic office. The smell made my head swell and nose run, and I hoped that my rubber gloves and boots were sufficient shield from the brown scum that covered all surfaces that were flooded. The organization lost about 75 per cent of equipment, and the Galveston Bay will be unsafe to kayak for months. All but the four veteran employees were laid off temporarily, and I have decided to migrate onward.”

When the water level riseth, the sewer overfloweth. Even without a Hurricane, there are many dangers to so-called sanitary sewers. Human excrement combines with drain cleaners and industrial chemicals, and is distilled at sewage treatment plants to create toxic sludge. Depending on your municipality, the sludge may be landfilled, incinerated, or applied to agricultural lands. All of these approaches can be hazardous to your health, and none are environmentally sustainable.

There is a better way. I learned about it thanks to The Homestead, and made it my topic for the Homestead Seminar for my senior year. Human excrement or “humanure” can be a valuable resource—if it is composted under the right conditions so as to kill pathogens. Sustainable living-practitioner Joseph Jenkins has authored an invaluable resource on this subject—The Humanure Handbook. (The Composting Toilet System Book by David Del Porto and Carol Steinfield is also a worthy tome.) With composting toilets, we could all be safer and our planet healthier.

Beyond waste management, The Homestead also taught me about temperature management. The strawbale Cabin Bob is cool in the summer with no air conditioning, and comparatively warm in the winter, even when there isn't a fire. Overall, the structure maintains homeostasis considerably better than the apartment complex in Houston. The Homestead has much to teach us about wiser forms of technology.


Cabin Bob and its proud south-facing windows, which capture the sun's warmth in the winter. The structure and its surroundings have evolved considerably since this 2001 photo.

I had intended to include with this post the educational comic/ poster on humanure that I created for my seminar project. I have been unable to find this item, so will post it at a later date. For now, I'll share a sea turtle. These critters are affected by all that occurs around coasts, and will appreciate a transition to sustainable methods.