ASHRAE Research Project 1480 Report - Food Service Technology ...

Experimental Design
Laboratory Layout
The layout of the laboratory was extensively modified to accommodate the large island type
hoods. Floor mounted displacement diffusers were added to supply up to 9,000 cfm of
conditioned air. The conditioned air was supplied by a floor mounted roof top unit and makeup
air unit. The local makeup air devices were supplied by two air handling units on the laboratory
deck. All hoods were connected to an exhaust fan with a maximum capacity of 9,600 cfm.
Individual airflow measurement stations were installed before each branch of the displacement
walls, perforated perimeter supplies, and ceiling diffusers. Plan views of the mechanical layouts
for the single island and double island hood set-ups are shown in Figures 1 and 2.
Displacement MUA
O
A
Perforated
Ceiling Diffuser
MUA Set-Up
PTA
5'-0"
HTR
24ft x 10ft
CC
RTU
SA
mix
box
Single Island Wall
C anopy Hood
10ft by 4ft by 2ft
PTA
PTA
electrical
HTR
mua
AHU2
AHU1
h
t
r
h
t
r
c
c
PTA
4-Way MUA
Set-Up
8'-0"
Displacement MUA
Figure 1. Layout of Supply Air Systems for Single Island Hood
Displacement MUA
PTA
3'-0"
O
A
HTR
24ft x 10ft
CC
RTU
SA
mix
box
Double Island
Canopy Hood
10ft by 8ft by 2ft
electric al
PTA
PTA
HTR
mua
h
AHU2 t
r
h
c
AHU1 t
r
c
PTA
6'-0"
Displacement MUA
Figure 2. Layout of Supply Air Systems for Double Island Hood
2-1
RP-1480