[Greenbuilding] An annotated St. Louis TMY2 simulation

[nick pine]

John Straube wrote:

>> To accomplish this, 48' of the 60 ft long fully exposed 
>> south-facing house (no trees or neighbors please) would need to be 
>> covered with air collectors.
>
> I'd vote for integrated "solar siding" over lots of wall insulation, 
> vs 6 4'x8' boxes.

Oops. That would be 12 4'x8' boxes.

> A 472 gallon tank works in Minneapolis, with the help of an 80% HRV, 
> or a bidirectional lung, which might be built into the solar siding:

Heating 50 gallons per day of water raises the Minneapolis tank size 
to 740 gallons...

80 L=60'house length (ft)
90 W=40'house width (ft)
100 AWIND=96'window area (ft^2)
110 UWIND=.2'window U-value (Btu/h-F-ft^2)
120 GWIND=AWIND*UWIND'window conductance (Btu/h-F)
130 AWALL=8*2*(L+W)-AWIND'wall area (ft^2)
140 RWALL=30'wall R-value (h-F-ft^2/Btu)
150 GWALL=AWALL/RWALL'wall conductance (Btu/h-F)
160 RCEIL=60'ceiling R-value
170 GCEIL=L*W/RCEIL'ceiling conductance (Btu/h-F)
180 FCFM=30'fresh air supply (cfm)
190 GAIR=.2*FCFM'equivalent ventilation concutance
200 GH=GAIR+GWIND+GWALL+GCEIL'house conductance (Btu/h-F)
210 CH=7000'inherent house capacitance (Btu/F)
220 LSLAB=2400/30*(65-44.9)'slab heat loss (Btu/h)
230 WLOSS=50*8.33*(110-44.9)/24'water heating loss (Btu/h)
240 EGAIN=300/30*3412/24'indoor electrical gain (Btu/h)
250 CGAIN=EGAIN-SLOSS-WLOSS'constant heat gain (Btu/h)
260 AHA=384'air heater area (ft^2)
270 CW=740*8.33'warm store capacitance (Btu/F)
280 CFM=1000'fan cfm
290 RAH=2/AHA+1/CFM'air heater equivalent resistance
300 TW=110'initial warm store temp (F)
310 TH=70'initial house temp
320 TAMIN=100'initialize min outdoor temp (F)
330 FOR YEAR=1 TO 2
340 AHMIN=1000'min house temp (F)
350 OPEN "minyear" FOR INPUT AS #1:LINE INPUT#1,H$
360 FOR H=1 TO 8760'TMY2 hours
370 INPUT#1,MONTH,DAY,HOUR,TA,WIND,TDP,SH,SS,SW,SN,SE
380 WGAIN=.6*AWIND*SS
390 IH=(TH-TA)*GH-WGAIN-CGAIN'house heat loss (Btu/h)
400 TH=TH-IH/CH'new house temp...

730 PRINT "2000'";CH,AHA,GH,TAMIN
740 PRINT "2010'";CW,TW,AHMIN
750 LIST 270

7000     384           115.3333     -20.92
6164.2   135.6835      60

Nick