Tom Mallard
  • Bellevue, WA
  • United States
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Standard Wall Thermal Upgrade Analysis
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Started this discussion. Last reply by Bill Bradbury Dec 2, 2013.

Applied Passive-solar Structural Design
48 Replies

Passive-solar has been known to work well but certain things about our architecture fail the thermodynamic efficiency test and there are reasons why.First is heat-transfer through conduction, the…Continue

Tags: comfort-zone, heat-transfer, passive-solar

Started this discussion. Last reply by Bill Bradbury Apr 2, 2012.

 

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Latest Activity

Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
""Efficiency" to me and building methods boils down to this heat-transfer model run showing a standard wall, and the same wall with insulation board added outside the sheathing and furring to hold the siding off to allow condensation drip,…"
Mar 12
Tom Mallard replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"A workaround if having to use a siding type that traps moisture is simply using furring strips ripped from plywood 1-1/2" wide vertically to vent condensation, this also moves the siding off the sheathing to reduce conductive-radiative…"
Feb 26
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"According to the article the code standards did work but only enough to cover growth, not a net reduction. My issue is that American Architecture is dumbed down to think you can be net-zero and not collect thermal energy, that's storing heat in…"
Feb 21
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Dennis, if you're getting 10-times more than 150m tall megawatthour machines that take massive financing with smaller, "less efficient" windmills you'll find it's a far better financial choice for a town than signing up for…"
Feb 20
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Efficiency is notching up incrementally now and it's expense, yet, until buildings collect & store thermal energy it's not logical to think that usage won't go up on a grid with more people. If that power is distributed to at…"
Feb 20
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Yeah, and the nuke sends that electricity to California to make more money. Obviously Phoenix doesn't need a nuke with that much solar available. I guess that's too obviously a waste of greywater to me when if you grow algae at the Phoenix…"
Feb 19
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"Just to add that using graywater recycling and the septic tank effluent for outdoor landscaping as Earthships do drops water usage from 96-ga/day/person to 19-gal/day/person, so, for those doing hand washing this isn't an issue. The…"
Feb 17
Tom Mallard replied to Tom Barrett's discussion How Much Energy Do Building Energy Codes Really Save? Evidence from California
"With Earthships as the model, what's missing in nearly all of those homes are fundamentals of thermal conservation. There is no thermal collection on those homes, there is no thermal-mass to store that energy for the daily cycle plus some,…"
Feb 12
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"Cost is not a metric in efficiency, efficiency is the metric. With alternatives you pay for capacity never by-the-watt or by-the-therm, therein lies a pack of lies because costs can be manipulated easily as seen by how reliable, honest, forthcoming,…"
Jan 4
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"That's unfortunate, fossil methane production is between crude oil and coal for carbon-footprint, the glut of new wells is why it's cheap but the long-term affect of that will be to keep heating the ocean, the air isn't as big a deal,…"
Jan 3
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"The grid mixes power, you can't tell where it came from unless you're doing the mix, it's a big money game so very complex with demand & supply with preference to fossil over wind and hydro, they don't mix it to cost the…"
Jan 3
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"Since solar hot-water units are cheap vs anything interior to a home and the water tank can be near the collector, I'd argue your using coal for at least 1/2 your power not sun and that's obviously ruining the planet when on the grid."
Jan 2
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"Thanks Theodore, perfect info."
Jan 2
Tom Mallard replied to Irvin McLaughlin's discussion Unhappy customer, feels should have saved more...
"Can't ask for much more than that, cheers Irvin!"
Jan 2
Tom Mallard replied to Irvin McLaughlin's discussion Unhappy customer, feels should have saved more...
"Have any of you ever run heat-transfer modeling of what you build, and how can you tell what's going on thermally if you don't? If not, the white is 20C, blue 0C, a simple conduction model run of 400-minutes the standard wall on top the…"
Jan 2
Tom Mallard replied to Damien Greenfield's discussion Is there is cost saving for you in having a tankless water heater?
"From my own & Earthship experience, add solar hot-water using a 150-gallon tank as average size to have enough mass to not cool down very fast, then on-demand rarely goes on."
Jan 2

Profile Information

Company
Mallard Design Company
Professional Interests
Residential scale wastewater purification using biomass to extract excess nutrients, autonomous architecture leveraging thermal-mass + insulation in wall systems, solar-thermal collection & storage of thermal needs hot&cold.
Website URL
http://www.mallard-design.com
Twitter ID
@tmallard
LinkedIn Profile
http://www.linkedin.com/in/mallarddesigncompany

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Tom Mallard's Blog

Applied Passive-solar Structural Design

Passive-solar has been known to work well but certain things about our architecture fail the thermodynamic efficiency test and there are reasons why.

First is heat-transfer through conduction, the wood, drywall, sheathing all having rather high heat-transfer coefficients. Next is convection from a heat-riser which takes the warmth of the floor and moves it to the ceiling.

Until these are dealt with they cost a lot of energy, if one is trying to not require external heating for…

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Posted on December 21, 2011 at 1:00pm

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At 8:28pm on March 2, 2011, Diane Chojnowski said…

Hi Tom,

Welcome to Home Energy Pros! Great start...thanks for adding all the great photos and comments. If you're blogging about home performance, this is the place for you!

Thanks!
Diane, HEP Moderator

 
 
 

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