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<FONT face=Tahoma size=2><B>From:</B> brian uher [mailto:brianuher@gmail.com]
<BR><B>Sent:</B> Monday, February 22, 2010 10:17 PM<BR><B>To:</B> Umesh
Atre<BR><B>Subject:</B> Re: [Bldg-sim] insulation hot humid
climates<BR></FONT><BR></DIV>
<DIV></DIV>Aushim,<BR><BR>Great Project.<BR><BR>I do not know if this is at all
helpful, but when we think about latent load even in the southern U.S., we focus
on air tightness and pre-dehumidification of incoming air. <BR><BR>Ground
coupled PEX tubing into a pre-chiller on the ERV intake (basically a car
radiator type gizmo, pump 1/4 hp, water in tubing at ground temp (go deep with
picks and shovels...), no heat pump), ERV (25 watts per 2000 SF) can create a
steady flow of fresh air and probably get the temp. down to 85F and control
humidity. Positive pressure flow (0.5 Pa) to the interior to keep out
humidity when doors open frequently. American retail for the pre-chiller
is $250 U.S. ; the ERV is $1800 U.S.Both the ERV and pump can be DC
powered. The intake on the ERV is MERV 12 filtered (so you are two away
from MERV 14 or hospital standard...reduces the burn rate on MERV 14 filters) ,
the MERV 12 filters can be removed and hand-washed. Sealed bearings (no
dust effect), self-balancing. It is 96% efficient on the sensible heat
exchange, 40% on the latent exchange. We know the head engineer, they will
love this project.<BR><BR>Skin the brick with wood spacers and corrugated metal
(1" spacing - like a vented rain screen - Bernoulli effect through the
corrugations - vertical venting), air tighten the single pane windows, big
overhangs (check the depth here: <A href="http://susdesign.com/tools.php"
target=_blank>http://susdesign.com/tools.php</A>) and a layered roof strategy
(say, 3 layers, perpendicular to one another, corrugated metal with wood
spacers...again, Bernoulli affect)...<BR><BR>Use air to create the
insulation...give me a week to run a Passive House model and give you rough sawn
numbers on wall assemblies...I take it you really need this bare bones and
repairable...but it is critical to control the air flows through the
envelope...do that, and you have a fighting chance to make something
amazing.<BR><BR>PS - dimensions? aspect ratio? how many floors? window
percentage? do you plaster the interiors?
orientation?<BR><BR>Brian<BR><BR><BR>Brian Uher, MS, MSE<BR>Managing
Partner<BR>Amicus Consulting Services<BR><BR><BR><BR><BR><BR>
<DIV class=gmail_quote>On Mon, Feb 22, 2010 at 5:03 PM, Umesh Atre <SPAN
dir=ltr><<A href="mailto:umesh@innovativedesign.net"
target=_blank>umesh@innovativedesign.net</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV dir=ltr align=left><FONT face=Calibri
color=#0000ff><SPAN>Aushim,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Calibri
color=#0000ff><SPAN></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Calibri color=#0000ff><SPAN>I would direct
you to this website: </SPAN></FONT><FONT face=Calibri color=#0000ff><SPAN><A
href="http://www.hothumidsymposium.org/"
target=_blank>http://www.hothumidsymposium.org/</A></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Calibri
color=#0000ff><SPAN></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Calibri color=#0000ff><SPAN>Per my
knowledge, you can access a lot of the past symposium
proceedings by visiting the following Texas A&M ESL
web-link:</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Calibri
color=#0000ff><SPAN></SPAN></FONT><FONT face=Calibri color=#0000ff><SPAN><A
href="http://esl.tamu.edu/pub/HH%20Catalog2.pdf"
target=_blank>http://esl.tamu.edu/pub/HH%20Catalog2.pdf</A></SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Calibri color=#0000ff><SPAN>Maybe you will
come across something that helps with your specific
project,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Calibri color=#0000ff><SPAN>Best of
luck!</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT face=Calibri color=#0000ff></FONT><FONT face=Calibri
color=#0000ff></FONT><FONT face=Calibri color=#0000ff></FONT><FONT
face=Calibri color=#0000ff></FONT><FONT face=Calibri
color=#0000ff></FONT><FONT face=Calibri color=#0000ff></FONT><FONT
face=Calibri color=#0000ff></FONT><FONT face=Calibri
color=#0000ff></FONT><BR> </DIV>
<DIV lang=en-us dir=ltr align=left>
<HR>
<FONT face=Tahoma size=2><B>From:</B> <A
href="mailto:bldg-sim-bounces@lists.onebuilding.org"
target=_blank>bldg-sim-bounces@lists.onebuilding.org</A> [mailto:<A
href="mailto:bldg-sim-bounces@lists.onebuilding.org"
target=_blank>bldg-sim-bounces@lists.onebuilding.org</A>] <B>On Behalf Of
</B>leen peeters<BR><B>Sent:</B> Monday, February 22, 2010 4:20
AM<BR><B>To:</B> <A href="mailto:bldg-sim@lists.onebuilding.org"
target=_blank>bldg-sim@lists.onebuilding.org</A><BR><B>Cc:</B> Aushim
Koumar<BR><B>Subject:</B> [Bldg-sim] insulation hot humid
climates<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Dear all,</DIV>
<DIV> </DIV>
<DIV>for a student project, we are studying the options for improving the
thermal comfort in a hospital located in Bangladesh. The aim is to use as much
cheap and local materials as possible. </DIV>
<DIV>They currently use simple metal non-insulated constructions. We will
go there and build a extension to an existing hospital. The idea is to
use bricks for the walls, wooden doors and single glazing. However the roof
remains in metal. We have a small budget for improving the indoor climate,
however have no experience in insulation in these climates.</DIV>
<DIV> </DIV>
<DIV>We would appreciate anyones help; references to reports,
publications or some usefull advice.</DIV>
<DIV> </DIV>
<DIV>Kind regards,</DIV>
<DIV> </DIV>
<DIV>Aushim
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