USE OM - JANUARY 2017
54
5.1.5
Data to Collect.
5.1.5.1
The following data is the minimum to be collected for each test performed:
B
SH
=
sensible heat energy balance, %
E
i
=
power input, indoor, W
E
h
=
electric heat module power input, W
E
t
=
power input total, W
L/S
=
instrument induced latent to sensible capacity ratio,
q
li
/q
shi
P
a
=
pressure, barometric, in. Hg
P
n
=
pressure at nozzle throat, in. H
2
O
P
v
=
velocity pressure at nozzle throat or static pressure difference across the
nozzle, in. H
2
O
R
2
= coefficient of determination
t
a1
=
temperature, air entering indoor side, dry bulb, °F
t
*
a1
=
temperature, air entering indoor side, wet bulb, °F
t
a2
=
temperature, air leaving indoor side, dry bulb, °F
t
*
a2
=
temperature, air leaving indoor side, wet bulb, °F
t
g(1-9)
=
leaving grid individual thermocouples 1 through 9, °F
t
n
=
nozzle temperature (if different than
t
a2
), °F
q
li
=
instrument induced
latent capacity, indoor, Btu/h
q
shi
=
sensible heatingcapacity, indoor, Btu/h
q
sri
=
electric heat module capacity, Btu/h
Q
i
=
measured airflow, indoor, ACFM
Q
S
=
measured airflow, SCFM
Q
t
=
target nozzle air flow rate, SCFM
v’
n
=
specific volume of air at the nozzle, ft
3
/lbm of air-water vapor mixture
Δt
a
=
actual differential temperature, R°
Δt
t
=
target differential temperature, R°
5.1.5.2
The following data is the minimum to be collected for each nozzle chamber, for
validation of conformance with ASHRAE 37 Section 6.2, Section 6.3 and Figure 5):
D
1x,y
=
distance from center of 1
st
nozzle to inside edge of nozzle chamber, in both
horizontal (x) and vertical (y) directions., in.
D
2x,y
=
distance from center of 2
nd
nozzle to inside edge of nozzle chamber, in both
horizontal (x) and vertical (y) directions., in.
D
3x,y
=
distance from center of 3
rd
nozzle to inside edge of nozzle chamber, in both
horizontal (x) and vertical (y) directions., in.
D
4x,y
=
distance from center of 4
th
nozzle to inside edge of nozzle chamber, in both
horizontal (x) and vertical (y) directions., in.
D
5x,y
=
distance from center of 5
th
nozzle to inside edge of nozzle chamber, in both
horizontal (x) and vertical (y) directions., in.
D
i,j
=
distance from center of nozzle
i
to center of nozzle
j
, in.
D
1
=
1
st
nozzle throat diameter for current nozzle combination, in.*
D
2
=
2
nd
nozzle throat diameter for current nozzle combination, in.*
D
3
=
3
rd
nozzle throat diameter for current nozzle combination, in.*
D
4
=
4
th
nozzle throat diameter for current nozzle combination, in.*
D
5
=
5
th
nozzle throat diameter for current nozzle combination, in.*
* The nozzle diameter reported is the average of four (4) separate nozzle throat
diameter measurements (refer to ASHRAE 37 Section 5.3.3).
5.1.5.3
A data input template is located in Appendix C.
