RE: [SPAM][hreg] A shameless plug for the Roundup...
From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Kathleen Carrier
Sent: Tuesday, May 16, 2006 12:49 PM
Subject: RE: [SPAM][hreg] A shameless plug for the Roundup...
We’ll be having an open house for an ICF house that is under construction in the next couple of weeks or so. With an R value of 40, the energy efficiency is exceptional. It is harder to build with a non-traditional, and it costs more.
I’ve got a couple builders that I work with that are willing to try new things . . . . takes time and effort but they both are willing to go the extra mile. There is incentive to do something different – I think both builders know that times are changing and they are eager to get on the environmental bandwagon. It’s sets them aside from the other builders.
From: email@example.com [mailto: firstname.lastname@example.org ] On Behalf Of Jim & Janet
Sent: Tuesday, May 16, 2006 12:23 PM
Subject: [SPAM][hreg] A shameless plug for the Roundup...
This is why the Architects and home builders who really do care about energy efficiency are so hard to find. The good money is in building traditional stick-built homes. Texas is fortunate to have a handful of these Architects and builders available to us. You can bet they will be at the Renewable Energy Roundup again in 2006 and for years to come.
----- Original Message -----
From: Steven Shepard
Sent: Tuesday, May 16, 2006 9:20 AM
Subject: RE: [hreg] How Big is Biomass energy?
No surprise there. Just try asking your builder or your plumber to insulate all hot water lines (even lines run through the slab) so you can install or improve the efficiency of a solar water heating system. They will fight you.
There is an old adage which states, "Arguing with a contractor is like wrestling a pig in the mud. Sooner or later you figure out the pig enjoys it."
From: "Shafer, Mark B"
Sent: May 16, 2006 8:57 AM
Subject: RE: [hreg] How Big is Biomass energy?
It seems 40% ofUSA energy consumption is in our homes and buildings. 40% of most home owners consumption, North or South, is for cooling/heating.
I think it would be beneficial for the state and feds to offer incentive programs to entice builders to use insulated concrete forms and SIP construction. The benefits are:
1. Safer structures against fire
2. Safer structures against hurricanes
3. Reduces your air conditioning bill by 2/3
After asking a friend why he didn't build his new house using ICF or SIP, he told me the contractors in Brenham looked at him like he was talking Greek. They were total unfamiliar with the ICF/SIP construction.
There needs to be some incentives for builders to learn the new technologies.
From: email@example.com [mailto: firstname.lastname@example.org ] On Behalf Of Roxanne Boyer
Sent: Monday, May 15, 2006 7:42 PM
Subject: [hreg] How Big is Biomass energy?
Total utilization of all additional farmable land (say byebye to parks and wilderness areas) in the US would only be able to supply 10% of the USA 's current energy consumption, and most of that would be in the form of electricity. Is that right?
DOE estimated that 500 to 600 million tons of plant matter could be grown and harvested annually in addition to our food and feed needs.[i][i] Plant matter has an energy content of about 13 million Btu/ton. The potential energy content amounts to 6.5 Quadrillion Btu/yr (The US consumes about 100 Quadrillion Btu/yr). This includes waste streams like corn stover and soy oil as well as dedicated energy crops like willow coppice or miscanthus.
Forrest residues from the lumber and paper industry already contributes almost 3 Quadrillion Btu of energy each year in theUS . The addition of wood from thinning national forests could potentially raise this amount to 4 Quad.
Animal waste (manure and processing waste) has a very low heating value due to the water content. However, disposal of this waste is becoming a major challenge, so energy recovery looks attractive. Total potential amounts to 1 or 2 Quad.
Municipal Solid Waste (MSW) could be converted to useful energy products in the amount of about one Quad. Primary goal is reducing the volume of waste to save landfill costs.
Overall, the total biomass potential that could be economically used without disrupting other industries amounts to about 10 Quads, or 10% of total US consumption today. Perhaps about 1/3 of that could be used for liquid biofuels (1.6 MMBPD, seven times more than production in 2004) with a market size of $25 billion. The balance would contribute to electricity (500 TWh/yr, in 70 GW capacity) and heating for sales/savings of about $50 billion per year. It could be assumed that farming techniques will improve biomass yields at about the same rate as energy consumption is increased in the US , keeping the 10% estimate constant.
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Don't missunderstand or give up Hope! Biomass can play a PART of the renewable energy portfolio. The point is that when making policy and a national energy plan, one must realize the real impact that can be made. We should only invest as much into a technology as we are going to get out (with a good return).
How does biomass compare to solar PV? Solar PV is now 10 to 15% efficient at capturing the suns energy, and could be 35% efficient with improved technology. Plants are now about 0.7% efficient at converting the sun's energy to biomass, and could be made 2% with genetic engineering. Then, there is an energy loss to dry, shred, transport and convert the biomass to electricity or fuel. In other words, PV on a 2000 ft2 house produces slightly more electric energy than an acre of land produces biomass energy.
I assumed 43,650 ft2/acre, and PV produces 25 times more energy per ft2.
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