[BLDG-SIM] DOE2.1e HP HEAT-EIR-FPLR Problems
Chris Jones
cj at cr-jay.ca
Wed Apr 4 07:41:43 PDT 2007
I am comparing the default DOE2.1e HP heating curves to the
performance data from various manufacturers. In particular the
EIR-FPLR curve does not fit what the manufacturers show in their
data. The default curve shows the EIR dropping as the part load
ratio drops. My assumption is that PLR = Operating Capacity/Design
Capacity. With the Trane, McQuay, and Waterfurnace data, the EIR
increases as the PLR goes down. I am assuming that part load is a
result of lower flow through the unit or from higher entering dry
bulb temperature. So when I do create my set of heating curves
HEAT-EIR-FT, HEAT-CAP-FT and HEAT-EIR-FPLR, the performance is
significantly worse than with the default DOE2.1e curves.
Am I misinterpreting how to plot the data points for the
HEAT-EIR-FPLR curve? Example from Trane:
COP CAP EIR Ent DB Ent WT PLR EIR/EIR
Design GPM FPLR
4.2 112000 0.238 68 68 1.000 1.000
24.5 (1.000, 1.000)
3.1 62675 0.323 70 20 0.560 1.355
12.1 (0.560, 1.355)
3.1 64639 0.323 70 20 0.577 1.355
18.4 (0.577, 1.355)
3.2 65641 0.313 70 20 0.586 1.313
24.4 (0.586, 1.313)
3.3 71123 0.303 70 30 0.635 1.273
12.1 (0.635, 1.273)
3.4 73541 0.294 70 30 0.657 1.235
18.4 (0.657, 1.235)
3.4 74631 0.294 70 30 0.666 1.235
24.4 (0.666, 1.235)
3.5 79943 0.286 70 40 0.714 1.200
12.1 (0.714, 1.200)
3.6 82643 0.278 70 40 0.738 1.167
18.4 (0.738, 1.167)
3.6 83991 0.278 70 40 0.750 1.167
24.4 (0.750, 1.167)
3.7 88881 0.270 70 50 0.794 1.135
12.1 (0.794, 1.135)
3.8 91903 0.263 70 50 0.821 1.105
18.4 (0.821, 1.105)
3.9 93457 0.256 70 50 0.834 1.077
24.4 (0.834, 1.077)
4 98031 0.250 70 60 0.875 1.050
12.1 (0.875, 1.050)
4 101429 0.250 70 60 0.906 1.050
18.4 (0.906, 1.050)
4.1 103173 0.244 70 60 0.921 1.024
24.4 (0.921, 1.024)
4.2 107353 0.238 70 70 0.959 1.000
12.1 (0.959, 1.000)
4.2 111199 0.238 70 70 0.993 1.000
18.4 (0.993, 1.000)
4.3 113135 0.233 70 70 1.010 0.977
24.4 (1.010, 0.977)
4.4 116795 0.227 70 80 1.043 0.955
12.1 (1.043, 0.955)
4.4 121041 0.227 70 80 1.081 0.955
18.4 (1.081, 0.955)
4.5 123169 0.222 70 80 1.100 0.933
24.4 (1.100, 0.933)
4.5 126363 0.222 70 90 1.128 0.933
12.1 (1.128, 0.933)
4.6 130957 0.217 70 90 1.169 0.913
18.4 (1.169, 0.913)
4.7 133313 0.213 70 90 1.190 0.894
24.4 (1.190, 0.894)
Thanks for any help!
Chris Jones, P.Eng.
14 Oneida Avenue
Toronto, ON M5J2E3
Tel. 416 203-7465
Fax. 416 946-1005
======================================================
You received this e-mail because you are subscribed
to the BLDG-SIM at GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE at GARD.COM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20070404/a47ab3d4/attachment.htm>
More information about the Bldg-sim
mailing list