Embed Size (px)
Citation preview
eLearning with Taco
Estimating Fuel & Electrical Consumption in Hydronics
Presented by John BarbaResidential Product Training and Program Manager
www.taco-hvac.com/flopro
-2-
Estimating Fuel & Electrical Consumption in Hydronics
Estimated Fuel UsageEFU = (Heating Load x 24 x DD x CF) / (AFUE x Q x DTD)
Formula Terms Heating Load The calculated heat loss of the house.
DD Degree days. (Please see below.)
24 24 hours in a day.
CF Correction Factor from Table C1 of IBR H-22 Heat loss and Design manual. (Please see below.)
AFUE Annual Fuel Utilization Efficiency of the boiler. (Stated as a decimal.)
Q BTUH content of unit of fuel.
DTD The design temperature.
-3-
EFU Correction FactorTo provide a more accurate estimate of the actual heating needs of a residence, apply the correction factors below to your “degree days” for the project.
Degree DaysFor degree day information visit: www.degreedays.net
Degree Days Correction Factor2,500 0.720
3,000 0.070
3,500 0.068
3,750 0.670
4,000 0.660
4,250 0.645
4,500 0.630
4,750 0.620
5,000 0.610
5,250 0.605
5,500 0.600
5,750 0.605
6,000 0.610
6,250 0.615
6.500 0.620
6,750 0.625
7,000 0.630
7,250 0.635
7,500 0.640
7,750 0.645
8,000 0.650
8,500 0.660
Table 1
Estimating Fuel & Electrical Consumption in Hydronics
-4-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2
Estimating Fuel & Electrical Consumption in Hydronics
-5-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2 (Continued)
Estimating Fuel & Electrical Consumption in Hydronics
-6-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2 (Continued)
Estimating Fuel & Electrical Consumption in Hydronics
-7-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2 (Continued)
Estimating Fuel & Electrical Consumption in Hydronics
-8-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2 (Continued)
Estimating Fuel & Electrical Consumption in Hydronics
-9-
Outdoor Design TemperatureOutdoor design temperature, ODT, for representative cities (At 97-1/2% frequency level, per ASHRAE 90A-1980 recommendation)Use different ODT if local conditions indicate the need. (Second number is heating degree days below 65˚F)AP= Airport AFB= Air Force Base CO= City Office
Table 2 (Continued)
Estimating Fuel & Electrical Consumption in Hydronics
Estimating Fuel & Electrical Consumption in Hydronics
Taco, Inc., 1160 Cranston Street, Cranston, RI 02920 (401) 942-8000 / Fax (401) 942-2360 Taco (Canada) Ltd. 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8 (905) 564-9422 / Fax (905) 564-9436
www.taco-hvac.com
Some information contained in this workbook was extractedfrom Heat Loss Calculation, Guide Number H-22
Revision 02 — 03/16/01, ©2001
Information used by permission of theHydronics Institute Division of GAMA
35 Russo Place, Berkeley, NJ 07922-0218
