Category Archives: technology

Swamp Cooling In The Desert

The Phoenix area is once again under an Excessive Heat Advisory with temperatures expected to be over 115 degrees through the weekend. It’s already 110° here this morning and it isn’t even noon yet. Earlier this week I wrote about how my swamp cooler was successfully taming the intense desert heat. It just occurred to me that some of you may not be familiar with evaporative coolers, and some of you who might know something about them may have some misconceptions. Here’s what my cooler looks like:

It’s not much to look at, is it? This particular cooler was purchased brand new about five years ago, yet it differs very little from the early twentieth century design upon which it is based.

Behind the louvers are excelsior pads which are kept wet with water. A blower inside the cabinet draws fresh air through the wet pads, and as the air passes through the pads, the water evaporates, causing the air to be cooled. The heat is literally being removed from the air as it vaporizes the water.

That’s probably technical enough for this description. If you want to learn more about how it works, this Wikipedia entry is a good start.

Swamp cooler? I thought you lived in the desert!

Well, yes. At least right now. And that’s where it works the best. Properly called an evaporative cooler, there are a few possible origins of its colloquial name. Perhaps it is because the extra humidity it adds to the air, especially during monsoon season or in an improperly vented room, can make it feel like a swamp. It could be because the air being pulled through the wet excelsior pads cools just like a breeze blowing through wet swamp vegetation. I’ve even heard it suggested that they are called swamp coolers because algae growing in a neglected or improperly maintained cooler can make it smell like a swamp, but that isn’t a problem I’ve ever  had in the 30+ years I’ve lived in the desert and used evaporative coolers.

Why use a swamp cooler?

  • Energy Efficiency – It uses 1/4 the electricity of mechanically refrigerated air conditioning.
  • Fresh Air – An evaporative cooler is constantly adding fresh air, replacing the air as frequently as once per minute.
  • Simplicity – An evaporative cooler is a very simple machine, making it economical to purchase, repair, and maintain.

Why aren’t they more common?

For one thing, they only work well in very dry climates, so you are not likely to find them outside of desert areas. Once the dew point gets into the 50’s (relative humidity over about 30%) their cooling performance is severely impaired. Here in North America you’ll find evaporative coolers in the western and southwestern United States as well as in the northern part of Mexico. They are also used in the southern part of Australia.

Even some people who live desert cities have not seen one, or at least wouldn’t recognize one if they did. And others wouldn’t be caught dead using one. I think that’s mostly due to the stigma carried by evaporative coolers as a cooling means of last resort only for the poor who can’t afford “real” air conditioning. While they certainly are inexpensive to buy and install as well as being economical to operate, I don’t understand why that should make them undesirable. I have actually seen ads for RV and mobile home space rentals that state “No evaporative coolers allowed.” So apparently the humble swamp cooler is shunned even within communities that are already considered “downscale” by much of society. It’s a shame so many people are more concerned with appearances and perceived social status than they are about economy, comfort, and environmental impact.

Freshly Pressed

I had an unexpected but pleasant surprise this past Tuesday when  one of my posts was selected to be “Freshly Pressed” — featured on the WordPress.com home page.  That was quite an honor, and the exposure drove quite a bit of fresh traffic to the site resulting in some new subscribers, too. I’d like to welcome my new readers and remind all of my readers that comments are always open on all my posts, so feel free to surf the archives and share your thoughts.

115 Degrees In The Shade

Well, folks, I have a couple more practical posts in the making, but they’re not quite ready for public consumption. On the other hand, I did say I was going to post at least once a week, and it’s been over a week now, so I thought I’d better offer up something.

About That Headline

Yes, it’s one hundred and fifteen degrees in the shade (135° in the sun!) here in the desert west of Phoenix. The absorption refrigerator is struggling to keep its contents cool. Stepping outside into the light breeze feels like walking into a giant convection oven. The forecast is for another couple days of the same, and the area is under a Heat Advisory. Summer is definitely here.

Keeping My Cool

Thanks to the Wonder of Ancient Technology known as an evaporative cooler, it is a very comfortable 82 degrees indoors, without running the air conditioner. I love my swamp cooler — not only does it save energy and money, but it also allows me to enjoy fresh cool air and open windows instead of having everything closed up and recirculating the same stale air. In another week or so I’ll unfortunately be having to do just that when the monsoon season’s increase in humidity renders the evaporative cooler ineffective. I’ll also see my electric bill triple for about three months.

Avoiding The Heat

So what have I been doing while I stay indoors avoiding the heat? Well, I’ve been pecking away at decluttering. I am amassing a boxful of small electronic bits, pieces, gadgets, and gizmos that individually would not be worth the trouble of selling, and don’t seem appropriate for thrift store donation either. Still, they’re just too darn good to throw away. I’m thinking of putting the whole boxful on eBay as a not-quite-mystery box. I’ll put up a couple photos and maybe some general descriptions of the highlights, and see what happens. If nothing else, it will be fun.

Multimedia Maintenance

I’ve also been working on my digital library as I transition from “legacy” paper and polycarbonate media to bits and bytes on a hard drive.  This is an ongoing project which I spend time on now and then when I’m in the mood. I could go into more detail sometime if you’d like to read about it. Let me know.

Clearing Clutter Pays Off

There are plenty of ways that eliminating clutter pays off. More space and less distraction, for example. But I wasn’t expecting it to pay off literally. I was going through some folded bits of paper and receipts the other day, making sure I wasn’t about to throw away anything important, and there it was folded up in an old store receipt: a twenty dollar bill! Pretty cool, huh?

In Other News

Do any of you write for content farms, or have you in the past? Are you considering writing for one to help make ends meet? You should give this NYT  Opinionator blog post and this Faster Times article a read.

Why I Don’t Carry A Smartphone

I recently did a guest post over on So Much More Life comparing multifunction and single purpose devices, using a smartphone as an example. It seems that while some commenters agreed with the general premise of the post, there was some question as to whether my example was the best one. Smartphone owners seem very happy with their devices and consider them among their most useful and important possessions. I’m guessing that they love their phones not so much because they also include a camera, GPS, and music player, but because they are  miniature computers with access to email, social networking, and the rest of the internet.

Perhaps my choice of a smartphone as an example in that post was a result of the fact that I don’t carry one, and don’t feel the need to be always connected everywhere I go. Allow me to elaborate.

I’m No Luddite

It isn’t that I dislike technology. Quite the contrary, in fact. When it comes to communications technology, I have been on the leading, and even bleeding edge most of my life. I have owned various smartphones, PDAs, tablets, pocket computers, pagers and more. There was a time when I carried multiple communication devices wherever I went. I felt that I needed to be reachable any time and any place. I was afraid of missing an important business or social opportunity.

What Changed?

Perhaps it is a bit of burnout. Been there, done that. Maybe it’s just that instant communication and constant availability have become ubiquitous; I sometimes lose interest in things if they become either too trendy or too pedestrian. Also, I think I started decluttering my social life long before I started on my physical clutter. I’ve learned that I don’t need to be instantly available to anyone at any time. I don’t need to instantly reply to email and blog comments.

Maybe it’s an age thing. When I was in my 20’s and 30’s I had more of a need to feel important and more of a fear of being left out. Now that I’m in my 50’s, I no longer feel that need for constant connectivity, and the occasional important message among the digital drivel can wait until I get to it.

Distracted Much?

Occasional distraction is one thing, but when it gets to the point that the virtual world becomes more important than the real world in front of you, it might be time to check your priorities. In a recent New York Times article, David Carr writes:

You are at a party and the person in front of you is not really listening to you. Yes, she is murmuring occasional assent to your remarks, or nodding at appropriate junctures, but for the most part she is looking beyond you, scanning in search of something or someone more compelling.

Here’s the funny part: If she is looking over your shoulder at a room full of potentially more interesting people, she is ill-mannered. If, however, she is not looking over your shoulder, but into a smartphone in her hand, she is not only well within modern social norms, but is also a wired, well-put-together person.

Add one more achievement to the digital revolution: It has made it fashionable to be rude.

I’ve learned that I don’t want to be that person. Isn’t live human interaction more important than what somebody you’ve never met just tweeted? Aren’t friends more important than “friends?” Email, Facebook, and Twitter can all wait until the meal, meeting, or conversation is over, can’t they?

I’ll admit, I was pretty obsessive about such things myself at one time. And if I still had that pocket-sized internet with me at all times now, I might still be tempted. My solution? I don’t carry that distraction and temptation with me. Even my plain phone gets turned off if I’m in a meeting or having dinner out with someone. If it’s important, they’ll leave a message or try again later.

I Don’t Need It Anymore

Back when I loved to bargain hunt, I liked having the internet with me to research pricing or other information about an item I was considering buying, but since I’m trying to cut my consumerism down to just the essentials (and those I can research from the comfort of home on a full-size screen) I don’t need that anymore. A smart phone can come in handy if you frequently find yourself with unexpected chunks of waiting time to kill. You can whip it out and catch up on email or maybe do some reading. I normally don’t find myself in that situation much anymore, but if I expect to have some waiting time — doctor’s appointment or waiting at the airport, for example — I’ll take my netbook along so I have a decent sized screen and a real keyboard to work with. Or maybe just my Kindle or a book and catch up on my reading.

There’s also the thirty dollars a month I don’t spend on a data plan ($360 a year!).

I’m Still Connected

Not carrying a smartphone is a decision I’ve made that saves me money and eliminates distractions. I don’t feel disconnected, and I don’t feel in any way left out of the online world. Instead, it allows me to choose when and how to deal with my digital communications, which is usually when I can sit down comfortably and relax, giving my email, writing, or other online activities the same undivided attention that I am able to give to my offline activities.

What do you think?

Do you carry a smartphone? Why or why not? What about your own feelings on “smartphone etiquette?”

Living Without Cable TV

Some of you may be considering the mobile lifestyle, but wondering how you’ll get your TV fix without cable. The obvious answer, certainly being yelled at their screens by visitors here from the minimalist blogs I’ve been frequenting of late (more about that in another post) is “Stop watching TV!” or at least “Watch less TV!”

While I can agree that television is a big time sink and a bad influence, I’ll also admit to watching my share of it. So if you are going to hit the road without having to go off TV cold turkey, what can you do?

There’s satellite TV. It will work almost anywhere, except that nice shady spot in the deep woods. It is also expensive – they don’t give you a free system for an RV like they do for a fixed house; you’ll pay $1000 or more up front.

If you have a decent internet connection, there’s a lot of good TV to be had online. Many shows, old and new, as well as movies, can be found on Hulu, but if you are on an internet plan with a usage cap, be careful. You can certainly watch a few shows and maybe stream a movie from NetFlix once in a while, but if you want to veg out all night you’ll hit your limit very quickly, unless you have a truly unlimited plan. To my knowledge, aside from grandfathered plans, the only carrier offering truly unlimited data is T-Mobile.

Of course there’s always the antenna. That old bat-wing antenna on your roof will pull in the new digital stations from as far as 50 miles away, and I know this from actual experience. Right now I’m over fifty miles from the nearest TV station but I get a crystal clear picture and sound of all the major networks, PBS, and assorted independent channels, about two dozen in all, for free, using just the antenna that was already installed at the factory on the roof of my 30-year-old motorhome.

Here’s a good article on watching TV without cable or satellite. It has links to a few good sites for finding shows online that you can’t find on Hulu.

Repairs, additions, and modifications

Now I had me a motorhome.  Old, but habitable and roadworthy.  Or so it seemed.  I kept noticing a strong smell of gasoline.  It was pooling on the manifold below the carburetor.  Not good – wastes fuel and is a fire hazard.  Maybe a loose hose or fitting?  Tightening everything up didn’t help.  Ahhh… there’s where it’s coming from – accelerator pump.  The rubber diaphragm was dried and cracked and allowing fuel to escape.  Replacement part was about five dollars, plus a half hour of my time to install. 

Motor was now good again – what about the “home” part?  Hmmm… some tiny leaks in the fresh water system.  Like the fuel leak, turned out to be pretty easy and inexpensive – a few connections needed tightened, and an o-ring in one, and that was that.  While I was at it, I made the rounds checking and tightening screws and whatever all over – cupboard hinges, appliance mountings, and what-have-you.  Removed the slightly tattered folding door to the bathroom.  Hung a shower curtain.  Starting to look pretty good.

 Now it’s time to customize a bit.  I started by taking the 8-track stereo (no kidding!) out of the dash and replacing it with something made in this century. Now I can listen to  AM, FM, and XM radio as well as play CDs.  Can’t play 8-tracks anymore, though.  Replaced the existing speakers with something a little better.  Decided not to go overboard with amps and subwoofers and such – just kept it simple, but good enough for casual listening.  I figure I can use headphones when I really want an audiophile experience, and the rest of the time, pretty good is good enough.  Back in the living area, I installed a television, and I sacrificed one of the overhead cupboards in the kitchen to install a microwave oven.  It’s getting pretty darn habitable in here now, huh?  Oh, the exhaust fan in the bathroom vent was pretty noisy and the screen a bit raggedy, so I replaced it with a ShurFlo Comfort Air vent fan (similar to a Fantastic Fan) – very quiet on low, and can move a lot of air if needed – makes a great whole-house ventilator.

Had to fix the ladder on the back, and I put a couple coats of Kool-Seal on the roof to seal and insulate it.  Put some new fog lights in the front to replace what was left of the pair that used to be there.  Of course all this work took place over the course of several months worth of weekends.  So the forum people were right about finding something that had “nothing wrong with it” – despite the lack of obvious defects, there was plenty to do to keep me busy between chasing down the more subtle issues and customizing it to meet my needs.  Still – it was cheap to buy and so far I haven’t had to sink too much money into it.  All the expensive stuff (engine, transmission, fridge, and a/c, for example) continues to be OK.  Even the customizing has been pretty inexpensive, using mostly stuff I had around anyway or picked up on the cheap.   

Portable Living Via Technology

The seed had been planted. I wanted to do this.  But could I?  While it’s true that it doesn’t take too much for basic survival, I didn’t want that to mean deprivation.  A motorhome would provide a roof over my head, a bed, bathroom, and kitchen.  Basic needs fulfilled. How about the secondary needs?  Not true necessities,  but stuff I’d rather not do without.  For me that means a computer with internet access, a decent sound system with music library, and television.  Pretty simple, really.  The hardware isn’t too much of a challenge.  For the computer a laptop would be ideal, but even a compact desktop system could work.  There are some pretty nice audio components made for the mobile environment, plus some compact home equipment that might be modified as well. And TV is, well, TV.  For those who want it, satellite TV adapts well to the RV environment, but personally I’m happy with what I can pull in with an antenna or the occasional DVD.  How about the internet connection and music library?  As recently as less than ten years ago the internet connection would have been almost impossible, and what was available, via cellphone, was very expensive and excruciatingly slow.  Now there’s cell-based wireless broadband service, satellite internet service, WiFi all over the place, and other options just over the horizon.  And a music collection?  I’ve been a music lover all my life, and a working DJ for part of it.  Can you imagine my trying to carry around a collection of thousands of vinyl records, hundreds of CDs, and hundreds of cassettes?  Not too long ago I’d have had to decide between music and mobility.  Not anymore.  With digital music storage and small hard drives with huge capacities, it’s now possible to carry an immense music library in the space of a single paperback book.  Add XM Satellite Radio and it’s like having a library of millions of songs, plus news, sports, talk, comedy, and more.  Cool.  Maybe this really can be done without too much technology deprivation.