Part Load Correction Factors - Heat Controller HEV Series Engineering Design Manual

Design Guide
Engineering Design Guide

Part Load Correction Factors

Air Flow Correction Table
Air ow
% of
Total
Rated Capacity
80
% 0.980
85
0.986
%
90
0.992
%
95
% 0.996
100
1.000
%
105
1.003
%
110
% 1.004
Entering Air Correction Table
Entering Heating
Air DB°F Capacity
50 1.023
55 1.021
60 1.016
65 1.009
70 1.000
75 0.989
80 0.978
Entering
Total
Air
Capacity
WB°F
45 0.628
50 0.712
55 0.797
60 0.882
65 0.966
67 1.000
70 1.051
75 1.135
Cooling
Sensible
S/T
Capacity
0.917 0.936
0.939 0.953
0.961 0.969
0.981 0.985
1.000 1.000
1.017 1.014
1.031 1.027
Heating
Heat of
Power
Extraction
0.773 1.084
0.827 1.068
0.882 1.049
0.940 1.026
1.000 1.000
* = Sensible capacity equals total capacity
1.063 0.971
AHRI/ISO/ASHRAE 13256-1 uses entering air conditions of Cooling - 80.6°F
DB/66.2°F WB,
1.128 0.941
and Heating - 68°F DB/59°F WB entering air temperature
Sensible Cooling Capacity Multiplier -
65 70 75
* * *
* * *
1.026 *
0.669 0.894 1.111
0.693 0.890
0.640 0.810
0.706
HEV-HEH SEriES
HEV/H SERIES
Heat of Heating
Power
Rejection Capacity
0.955 0.975
0.964 0.982
0.975 0.988
0.986 0.994
1.000 1.000
1.016 1.005
1.033 1.010
Cooling
Entering DB °F
80 85 90 95
* * *
* * *
* * *
* * *
1.092 1.298 *
1.000 1.202 *
0.862 1.060 1.298
0.633 0.860 1.087 1.314
22
Heating
Heat of
Power
Extraction
0.979 1.035 0.965
0.984 1.021 0.975
0.990 1.011 0.984
0.995 1.004 0.993
1.000 1.000 1.000
1.006 1.002 1.007
1.011 1.006 1.012
Heat of
Power
Rejection
100
* * 1.010 0.698
* * 1.008 0.767
* * 1.006 0.835
* * 1.003 0.904
* * 1.001 0.973
* * 1.000 1.000
* * 0.999 1.041
1.541 0.996 1.110
Heat Controller
Heat Controller,