alternative

trash_plant-2983360
Energy

The Power of Trash

A big worry today is what to do with all the waste that is disposed of in our everyday lives. Where is all the wrappers, napkins, uneaten food, worn clothing, broken furniture, etc that needs to be disposed of going? and how do we make trash a positive effect for our environment. Recycling and reuse are great options but what about the pizza box that can’t be recycled or the torn pants that can’t be repaired, they should be able to make a difference too.

So while prowling the forum over at TreeHugger a discussion of if it was an energy source was found. Which reminded us of two options for small or large scale renewable power can come from garbage. Methane harvesting and incineration of that which can’t get a second life as usable product.

Methane harvesting is a viable option especially in todays calling for alternative fuel options. Methane can be harvested and sold as is or could be piped to an electric plant to produce electricity, which then can be sold. Back in 2000 NASA’s Goddard Space Flight Center awarded a contract to the Toro Energy to use landfill gas. According to the release at the time of the contract:

Goddard plans to purchase no less than $900,000 of landfill gas annually. The unit gas cost includes the costs of building facilities to accommodate the delivery of gas. The Center also intends to expand use of the gas to alternate-fueled vehicles, and possibly to become a centralized government fueling station. Other possible applications for using the landfill gas may be powering chillers in the power plant, or even electrical generation.

So the idea to do this has already been implemented in large scale projects and seven years in to this contract there has not been a large outcry (nor that we’ve heard small) about this not being a working option. No outcrying of harmful side effects from employees of the base, landfill or residents living between the two of health concerns. Considering the skepticism and some downright disapproval in the public at the time it was implemented that is almost a miracle in itself.

trash_plant-2983360Burning trash is another option that is possible. In Baltimore City there is a plant, one of only 16 in the country, that has been doing it since 1984. Considering that at that time most plants of this type were still the dirty, polluting ones in our nightmares, it’s amazing that it is actually a source of pride to our city (at least the ones who realize it’s there and what it does). There is no haze that hangs around or odors that can be smelled miles away. The plant. Wheelabrator Baltimore Inc., has actually worked to help clean up the area and become a symbol of the ideal waste burning plant.

Their first step is to remove metal that can be …

Read More »

Solar Water Heating Not Just For Us Campers

Campers have known the benefit of solar water heating, but homeowners are just starting to see the benefits of letting the sun heat their water instead of paying the power company to do it for them. There are two different types of solar heating systems: passive, which doesn’t rely on circulating pumps and controls, and active, which does.

You will still need a well-insulated storage tank so don’t throw away your water heater just yet. You can opt to add a solar storage tank which has additional outlets and inlets that connect it to and from the collector to form a two-tank system. In which the solar water heater preheats the water making the amount of energy needed to heat the water to desired temperature much less. The other option is to go completely solar and get a solar tank that has a back up water heater in it. Since nights and cloudy days can have a significant effect on how much water is heated by the sun.

For us needing a residential system we have three options:

  • Evacuated-tube solar collectors
    This system features parallel rows of transparent glass tubes. The tube is made of a glass outer tube with a metal absorber tube attached to a fin. This fin has a coating which absorbs solar energy nut stops radiative heat loss. Though this system is used more in commercial applications it is available for residential use also.
  • Flat-plate collector
    For this system glazed flat-plate which are insulated are contained inside a weatherproof box. The box will have a dark absorber plate situated under one or more glass/plastic cover. There is also a unglazed flat-plate collector system that is typically found for heating pool water. This system also has a dark absorber plate, which can be made of metal or plastic, but it does not have a cover or enclosure.
  • Integral collector-storage systems
    These can also be called a ICS or batch system, as they feature black tanks(s) or tubes in an insulated, glazed box. This is a two tank system as cold water will first past through the solar collector to preheat it then continue on to a conventional water heater. This system will always be a source of reliable hot water, though it can only be installed in climates that no to a mild-freeze because of the possibility of the outdoor pipes freezing or bursting in sever weather.

For those who want an active solar water heating system you can use one of two systems. The first is a direct circulation system which uses pumps to move the water through the collector and into the home. Once again only advised in mild climates because of the damage freezing can have on the outdoor parts of the system. The second is an indirect circulation system which uses an alternative non-freezing fluid through the collectors and then into a heat …

Read More »