Heat of extraction/rejection data, Reference calculations, Legend – WaterFurnace Envision Low Sill User Manual
Page 40: Heat of extraction/rejection data legend
40
ENVISION LOW SILL CONSOLE INSTALLATION MANUAL
Model
gpm
Heat of Extraction (HE)
Heat of Rejection (HR)
30°F
50°F
70°F
90°F
30°F
50°F
70°F
90°F
110°F
09
1.2
6.2
8.1
10.6
12.9
12.1
11.8
1.8
5.0
6.6
8.5
10.8
13.9
13.1
12.4
11.7
10.9
2.5
5.0
6.9
9.0
10.9
14.0
13.4
12.6
11.8
11.0
12
1.5
7.8
10.1
12.4
15.2
14.4
13.9
2.3
6.3
8.1
10.4
12.6
16.3
15.4
14.6
13.9
12.9
3.5
6.2
8.6
10.9
12.8
16.3
15.8
14.9
14.0
13.0
15
2.0
10.3
12.4
16.4
19.7
18.2
19.9
3.0
8.8
10.7
12.9
16.7
19.4
19.8
18.2
20.0
18.7
4.5
7.4
11.3
13.7
17.0
19.5
19.9
18.2
20.2
18.9
18
3.0
12.0
15.2
17.6
23.8
22.0
20.7
4.0
9.5
12.2
15.5
17.9
23.4
23.9
21.9
20.7
19.4
5.5
8.5
12.6
16.0
18.2
23.5
23.9
21.9
20.9
19.5
Data provided in MBtu/h
6/10/13
Heat of Extraction/Rejection Data
Legend
ABBREVIATIONS AND DEFINITIONS:
cfm = airflow, cubic feet/minute
EWT = entering water temperature, Fahrenheit
gpm = water flow in gallons/minute
WPD = water pressure drop, psi and feet of water
EAT = entering air temperature, Fahrenheit
(dry bulb/wet bulb)
HC
= air heating capacity, MBtu/h
TC
= total cooling capacity, MBtu/h
SC
= sensible cooling capacity, MBtu/h
KW = total power unit input, kilowatts
HR
= total heat of rejection, MBtu/h
HE
= total heat of extraction, MBtu/h
HWC = hot water generator capacity, MBtu/h
EER = Energy Efficient Ratio
= Btu output/Watt input
COP = Coefficient of Performance
= Btu output/Btu input
LWT = leaving water temperature, °F
LAT = leaving air temperature, °F
TH
= total heating capacity, MBtu/h
LC
= latent cooling capacity, MBtu/h
S/T = sensible to total cooling ratio
Reference Calculations
Heating Calculations:
Cooling Calculations:
LWT = EWT +
LAT(DB) = EAT(DB) -
LC = TC - SC
S/T =
HR
gpm x 500
SC
cfm x 1.08
SC
TC
HE
gpm x 500
LWT = EWT -
LAT = EAT +
TH = HC + HWC
HC
cfm x 1.08