Hybrid Car – More Fun with Less Gas

Re: Why not live underground?

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Posted by nicksanspam on February 4, 2006, 2:44 pm
 
Pal  <"gtsubs at tpg dot com dot au"> wrote:
 

20 PI=4*ATN(1)
30 W=2*PI/365'annual angular frequency (radians per day)
40 TM=((53.6+93.5)/2-32)/1.8'mean yearly temp (C)
50 T(5)=TM'indoor air temp (C)
60 TAM=(93.5-53.6)/2/1.8'peak amplitude (C)
70 D=9'sand depth (meters)
80 G=1.47*4/D'layer conductance (W/C)
90 C'40*774*D/4'layer capacitance (J/C)
100 FOR Y=0 TO 9'simulate 10 years
120 FOR M=0 TO 11'months
130 FOR D=0 TO 29'days
140 T(0)=TM+TAM*SIN(W*(30*M+D))'outdoor temp (C)
150 FOR I=1 TO 4'sand layer (4<->bottom)
160 Q$*3600*(T(I-1)-T(I)+T(I+1)-T(I))*G'heatflow into layer (joules/day)
170 T(I)=T(I)+Q/C'new layer temp (C)
180 NEXT I
190 NEXT D
200 PRINT Y;M;T(0);T(1),T(2),T(3),T(4)
220 NEXT M
230 NEXT Y

       top (F)                                      bottom (F)
      
9  0   28.3893     21.67567   21.40341   22.34258   22.90086
9  1   32.50215    24.05833   22.05769   22.31773   22.79634
9  2   34.15836    26.13712   22.97749   22.50099   22.77032min
9  3   32.92597    27.39362   23.91656   22.83945   22.82909
9  4   29.12642    27.5111    24.62977   23.24156   22.95603
9  5   23.7507     26.46449   24.93231   23.60069   23.1168
9  6   18.20091    24.5298    24.74658   23.82241   23.26859
9  7   13.92457    22.21343   24.12213   23.84863   23.37126
9  8   12.03703min 20.12067   23.22268   23.67253   23.39773
9  9   13.0306     18.79809   22.28351   23.3402    23.34099
9  10  16.64614    18.59117   21.55011   22.93853   23.21584
9  11  21.94064    19.55424   21.21418   22.57251   23.05496

Looks like it takes 9 meters(!) to make 6 months, but all this sand makes
a good low-pass filter. The yearly temp change on the underside becomes tiny.
A house below the arctic circle might stay comfy with just a few days of
storage and some passive solar heat and ventilation and evaporation.

Nick


Posted by Tony Wesley on February 4, 2006, 3:08 pm
 
And be a Morlock?


Posted by Merlin-7 KI4ILB on February 10, 2006, 10:51 pm
 They have some people living in old bunkers converted into homes near me.
Most have added some sky lights and some windows in the Front (where the
truck entrance used to be) It seems all they need is a very small HVAC unit
mostly to help control humidity.

joe



Posted by SJC on February 10, 2006, 11:13 pm
 

 There used to be stories about people buying old missle silos
from the government and converting them into homes. Guess
tornados would not get you there.



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