Green Options

Just as data farms need to have that warmth removed, day in/day out, greenhouses, by contrast, need a supply of consistent warmth, summer and winter.

Put the two together and you have a marriage made in heaven. For example; between the Ella Morris and Muessel-Ellison Botanical Conservatories and Potawatomi Greenhouse and Indiana’s University of Notre Dame.

According to the NAU researchers, the warming that occurred in the 20th Century and early 21st Century, “contrasts sharply” with the millennial-scale cooling trend; the last half-century being the warmest in the record, and, the decade from 1999 - 2008 being the warmest decade of the last 200 decades. Over all average temperatures were 1.4° C (about 2.5° F) warmer than the projected value based on the linear cooling trend.

Here’s a very good example of simple tech that works efficiently. Because hot air rises, cool air falls down. So if chilled water is carried through tubes at the ceiling, it sucks hot air from a room; sending down the cooler air. Simple tech is often low carbon technology too.

There is a growing movement to assess the value–in dollar terms–of “ecosystem services” such as storm protection (from salt marshes), pollination of crops (from bee colonies and insects), natural predation of harmful insects and parasites (by birds, bats and other animals), fertilizer from animal feces, fish in the oceans, clean water and air, and cooling/greenhouse gas-controlling forests, etc.

This movement has been gaining steam–especially with the recent [...]

Sometimes, the best solutions are the ones that nature gives us. Researchers at the University of Bristol in England think that one easy way to counteract global warming is to plant crops that reflect more sunlight. Plants reflect different amount of sunlight depending on their waxiness and growth patterns.

Albert Einstein is probably most remembered by the public for his General Theory of Relativity, but how many remember his 1930 invention of a refrigerator that used no electricity?  I wasn’t there when it was introduced, but I knew several people who had one, and they weren’t all that happy with it, primarily because it wasn’t that efficient.

The idea was great, it operated without electricity, using ammonia, butane and water.  The principle being that water boils at a much lower temperature at high altitudes where air pressure is lower than it does when you’re at sea level, where air pressure is higher.

Malcom McCulloch, an electrical engineer at Oxford University in the U.K., is leading a team in a three year project to produce appliances that can be used in places without electricity.  Or, for that matter, places with electricity, why not?.  That’s when McCulloch latched on to Einstein’s fridge idea.

Einstein’s concept, shown in the image above, works thusly.  At one side is the evaporator, a flask that contains butane. “If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so,’ says McCulloch. ‘That’s what makes it cold.”

As part of their year-long “Change the World, Start with ENERGY STAR” campaign, EPA has launched a website to help you save money and and energy with your programmable thermostat. A programmable thermostat properly programmed and used can reduce 1,847 lbs of green house gas emissions a year. According to the EPA, maximizing household energy use through serviced heating and cooling systems, leak-less ducts, and thermostats that are programmed to save energy at night or when residents are away, would prevent 169 billion lbs of greenhouse gas emissions per year. To those who are more swayed by the impact on their wallets, programmable thermostats can save about $180 a year. Find valuable tips and resources, including tutorials and a video podcast, on their new website www.energystar.gov/programmablethermostats.

Some of the helpful tips include lowering the temperature setting by 8 degrees when you’re away or asleep in the winter, or raising the temperature setting by 7 degrees when you’re away and 4 degrees when you’re asleep in the winter. Take advantage of the “Vacation” and “Hold” features to manage temperatures while you’re away from home for an extended period. More helpful tips from the EPA:

Editor’s note: While we’ve discussed home geothermal systems a number of times around the Green Options Media network (see the list at the bottom), we’re glad to bring you today’s post from GreenBuildingTalk on the subject. They not only provide an overview of the technology, but point you to some cutting-edge models of geothermal heat pumps. This post was originally published on Thursday, May 15, 2008.

With energy costs on the rise, homeowners are looking for ways to offset higher bills. Geothermal heat pumps are one of the best options, as they currently offer the highest efficiencies of any heating and cooling system available today. A study by MIT emphasizes the potential for geothermal, and manufacturers are offering more options for consumers. While at the Midwest Builders show, I stopped by ClimateMaster and WaterFurnace booths to learn more about their newest offerings. Before diving into the respective systems, let’s review the three main components of a geothermal system; the heat-pump unit, the liquid heat-exchange medium (open or closed loop), and the air-delivery system (ductwork).

The heat pump simply moves heat energy from one place to another, just like your refrigerator or air conditioner. But a major difference is that air conditioners and refrigerators transfer heat in only one direction, while a heat pump can transfer heat in two directions, thereby heating or cooling the space. In the cooling mode, the geothermal heat pump takes heat from indoors and transfers it to the colder earth through either groundwater or an underground earth loop system. In the heating mode, the process is reversed.

The buried pipe, or earth loop, is the most important technical advancement in heat pump technology to date. The idea to bury pipe in the ground to gather heat energy began in the 1940s. But it’s only been in the last twenty-five years that new heat pump designs and more durable pipe materials have been combined to make geothermal heat pumps the ultimate in efficiency. The two main types of loops available are open and closed. An open loop system is less expensive to install, but over time could require more maintenance. A closed loop system is more expensive up front, but requires almost no maintenance. As manufacturers phase out R-22 (HCFC) refrigerant, there have been more environmentally friendly liquid mediums brought into the marketplace to use in your system. The most common antifreeze solutions in the U.S. and Canada are propylene glycol, methyl alcohol, and ethyl alcohol.

Editor's note: This week, Lighter Footstep editor Chris Baskind shares some ways to cool off your kitchen this summer… and keep those electric bills down! This post was originally published on July 3, 2007.

Can't stand the heat? Don't get out of the kitchen this summer — cook smarter!

Summer is here — at least in the Northern Hemisphere — and with it, high cooling bills.

It's not just your pocketbook

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There are a lot of small, easy things you can do to get the most out of your AC and lighten the energy load for savings in your energy bill.

Don't touch that thermostat
The magic number is 78 degrees. In most climates this is a comfortable temperature setting. Each degree higher than that will save you 6 to 8 percent in cooling costs. You can also set it a couple degrees higher

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Editor's note: Summer's coming, and our friend Chris Baskind, editor at Lighter Footstep, has put together a monster list of tips for staying cool… the green way.

With summer officially around the corner and temperatures edging higher, the Lighter Footstep editors have put together a giant list of ways to keep your cool.

We'll start with a quick apology to our readers in the Southern Hemisphere: we know you're there. Bookmark this and

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