ceiling inlel slots
manure pit
Figure 1. 1/5 scale model ventilation
In PA and Surrounding Statea
Cuatom Roaal
David N. Groff
RD 3 Lawiaburg, PA
(717) 868-1420
Horst Grain Roasting Roast-M-Matic
3040 Psnns Grovs Rd. Grain
Lincoln Unlv., PA 19352 Salss-Ssrvioa
(Chester Co.) Custom Work
(215) 869-8834 Roast-Cool Unit Available
JANUARY 3-8, 1994
HOUSE
OPEN
Call For Special Prices On Oil.
10% Off All Parts In Stock.
(-CHARLES S. SNYDER, INC.-i
RD#3, Box 109, Tamaqua, PA. 18252
1 Mile East Of Rt. 309 On Rt. 443
(717) 386-5945 Fax (717) 386-4080 —
MON. THRU FBI. 8:00 A.M. TO 5:00 P.M.;
SAT. 8:00 A.M. TO 12:00
EVENING HOURS BY APPOINTMENT
SHIP PARTS UPS DAILY
walkways
Schnupp'a Grain
Roaatinf, Inc.
RD 6 Labanon, PA
1-800-482-4004
717-888-6611
cage row
0^
blower
system cross-section
FOR SAtEX
PEANUT 1
HULLS
For
BEDDING
Moateffactive I
as bedding for all I
kinds of best and I
dairy cattle, hogs,
, - horses, sheep and
k poultry
\ Any amount delivered
sr or call for at farm.
Esbenshade
Turkey Farm
(America’s Oldest—
PO Box 337
Paradise, Pa.
(717) 687-7631
1 (800) 273*388:
i!
suuJfci:i
ftiliiliii
Fred:
iicted Air:
Figure 2. Airflow
ceiling inlet sys
* ~
liiiiiilll
Patterns
r patterns and random particle tracks for multiple slotte
:em.
Penn State
Poultry
Pointers
POULTRY
ENVIRONMENTAL
CONTROL RESEARCH
AT PENN STATE
T. H. D’Alfonso
Ph.D. Candidate
H. B. Manbeck
Professor
Department of
Agricultural and
Biological Engineering
An environmental control
strategy is important for livestock
production.
Several factors need to be con
sidered to ensure that a healthy
environment exists for the animals
to perform optimally.
Different control capabilities
exist for a given production house.
Systems can range from natural
ventilation to computer-controlled
mechanical systems.
In any case, the objective is to
control, as best as possible, the ani
mal’s environment This means
that the air in the production house
contains minimal contaminants
(dust and gaseous) and is at a temp
erature conducive to optimal lives
tock performance.
Recent research at Penn State
University has focused on the dis
tribution of air and temperature
throughout poultry production
buildings. Even though average air
Observed:
Predicted:
Figure 3. Trajectories of bubbles injected at
the inlet of flow system.
Lancaster Farming, Saturday, January 1, 1994-C5
Random Particle Tracks
exchanges and house temperatures
may be adequate, some regions
within the facility may contain
stagnant, contaminated air or
temperature deviations.
This implies that some of the
birds may not experience adequate
air quality or environmental temp
erature. Subsequently, some of the
animals may perform poorly.
Traditional techniques for plan
ning environmental control
schemes typically focus on aver
age air temperature and average air
exchanges per animal. New engi
neering techniques allow for
analysis of air flow and air conta
minant levels throughout a build
ing, including visualization of air
and Contaminant patterns around
cages.
Maghirang and Man beck (1993)
and Worley and Manbeck (1993)
demonstrated such a technique in
the analysis of poultry production
buildings. Utilising FLUENT, a
fluid dynamics computer model
ing program, it was shown that
engineers could predict air flow
patterns and contaminant concent
ration levels quite reliably.
The production building pro
totype under consideration by
Maghirang and Manbeck (1993)
was a 10-meter (32.8-foot) wide,
2.5-meter (8.2-foot) high floor
managed system, and was venti
lated by side-wall exhaust fans and
y
(Turn to Pag* C 8)