Geotherm operation
(Continued from Page A3O)
through the inside of the barn via a
plastic fan tube
On the outside corner, Horst
placed two inlet pipes each con
nected to a *fan. The first pipe
travels 75 feet to the first fan, and
the second pipe travels 100 feet to
the second fan. The pipe is plastic,
corrugated dram pipe and costs
about $4.75 per foot.
The pipes jut up from the ground
and connect directly to the fans. A
Martin air system harvests the air
and blows it through the plastic fan
tube. A baffle device on the air
system controls the air velocity.
The temperature of the har
vested air, Horst said, depends on
two variables - the length of the
pipe and the velocity of the air. He
said a minimal length of 150 feet
for each pipe would be optimum.
At this length, less variation
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Buy a total of 10 bags of Stanford Medistan Brand
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between the outside to inside air
would be achieved, and the air
would be more stable.
The baffle, which is part of the
Martin air system, moves in an
upward and downward direction
and controls the velocity. When
almost completely closed, the air
temperature is about 50 degrees,
Horst said.
Horst said his veal calves have
adjusted well to the geotherm
system. Veal calves don’t like
flucuations in temperature, he
said, and are best raised under a 75
to 80 percent humidity range.
Horst gets these conditions with his
geotherm system.
The veal calves are raised in an
all in, all out system. They are fed
a milk replacer made up of skim
milk, whey, fat and vitamins
mixed by Horst himself. The
replacer, which is fed for 15 weeks,
is mixed with hot water heated by
STATE
the solar panel.
Horst said lus geotherm system
is operating at virtually no extra
cost, and he is saving money by
cutting costs on electric and
combustible tuel. He is pleased
with his system and says the only
problem deals with a high water
table.
Because of this, he sometimes
has to drain water from the pipes.
He plans to build a concrete pad
around his outlet pipes to control
water drainage.
If planning on building a
geotherm system, Horst suggests
the following considerations: the
size of the fan, the temperature one
plans to maintain, the importance
of the cooling system, and the
height of the water table.
For fan size, Horst said that the
fan and the pipe should be of the
same diameter. This will allow for
more surface heat exchange and
will keep the negative pressure
less than that of the fan. A main-
Stanford forages are bred specifically for maximum
performance under the varied and demanding
growing conditions of the Northeast. A wide selec
tion of varieties and mixtures of clover, alfalfa,
timothy and trefoil allows you to choose the forage
that meets your requirements for disease resis
tance and winter-hardiness—without compromis
ing yield
See your local Stanford dealer for all your seed
requirements.
ivy Stanford Forages now-and the Stanford
jacket Is yours free.
SEED PURCHASED FROM
DATE PURCHASED
NUMBER OF BAGS PURCHASED (must total 10)
MEDISTAN BRAND ALFALFA i
distribution, are placed above the calf stalls and allow the
flow of the warm geotherm air
tained temperature, Horst said,
can be obtained through the pipe
size. Cooler air is possible through
slow air movement.
By capturing heat from the
TRISTAN CLOVER
PEAK BRAND TREFOIL
TIMSTAN 1 BRAND TIMOTHY
TIMSTAN 2 BRAND TIMOTHY Stanford
ground, Horst hopes to maintain
the optimal 75 degree-temperature
required for veal calf operations. A
temperature of 68 degrees would
be ideal, he said.