---

10 C.F.R. Appendix P to Subpart B of Part 430—Uniform Test Method for Measuring the Energy Consumption of Pool Heaters

Title 10 - Energy

Title 10: Energy
PART 430—ENERGY CONSERVATION PROGRAM FOR CONSUMER PRODUCTS
Subpart B—Test Procedures

Browse Previous |  Browse Next

Appendix P to Subpart B of Part 430—Uniform Test Method for Measuring the Energy Consumption of Pool Heaters

1. Test method. The test method for testing pool heaters is as specified in American National Standards Institute Standard for Gas-Fired Pool Heaters, Z21.56–1994.

2. Test conditions. Establish the test conditions specified in section 2.9 of ANSI Z21.56–1994.

3. Measurements. Measure the quantities delineated in section 2.9 of ANSI Z21.56–1994. The measurement of energy consumption for oil-fired pool heaters in Btu is to be carried out in appropriate units, e.g., gallons.

4. Calculations

4.1  Thermal efficiency. Calculate the thermal efficiency, E_t (expressed as a percent), as specified in section 2.9 of ANSI Z21.56–1994. The expression of fuel consumption for oil-fired pool heaters shall be in Btu.

4.2  Average annual fossil fuel energy for pool heaters. The average annual fuel energy for pool heater, E_F, is defined as:

E_F=BOH Q_IN+(POH−BOH)Q_P

where:

BOH=average number of burner operating hours=104 h

POH=average number of pool operating hours=4464 h

Q_IN=rated fuel energy input as defined according to 2.9.1 or 2.9.2 of ANSI Z21.56–1994, as appropriate

Q_P=energy consumption of continuously operating pilot light if employed, in Btu/h.

4.3  Average annual auxiliary electrical energy consumption for pool heaters. The average annual auxiliary electrical energy consumption for pool heaters, E_AE, is expressed in Btu and defined as:

E_AE=BOH PE

where:

PE=2E_c if heater tested according to 2.9.1 of ANSI Z21.56–1994

=3.412 PE_rated if heater tested according to 2.9.2 of ANSI Z21.56–1994, in Btu/h

E_c=Electrical consumption of the heater (converted to equivalent unit of Btu), including the electrical energy to the recirculating pump if used, during the 30-minute thermal efficiency test, as defined in 2.9.1 of ANSI Z21.56–1994, in Btu per 30 min.

2=Conversion factor to convert unit from per 30 min. to per h.

PE_rated=nameplate rating of auxiliary electrical equipment of heater, in Watts

BOH=as defined in 4.2 of this appendix

4.4  Heating seasonal efficiency.

4.4.1  Calculate the seasonal useful output of the pool heater as:

E_OUT=BOH [(E_t/100)(Q_IN+PE)]

where:

BOH=as defined in 4.2 of this appendix

E_t=thermal efficiency as defined in 4.1 of this appendix

Q_IN=as defined in 4.2 of this appendix

PE=as defined in 4.3 of this appendix

100=conversion factor, from percent to fraction

4.4.2  Calculate the seasonal input to the pool heater as:

E_IN=BOH (Q_IN+PE)+(POH−BOH) Q_P

where:

BOH=as defined in 4.2 of this appendix

Q_IN=as defined in 4.2 of this appendix

PE=as defined in 4.3 of this appendix

POH=as defined in 4.2 of this appendix

Q_P=as defined in 4.2 of this appendix

4.4.3  Calculate the pool heater heating seasonal efficiency (in percent).

4.4.3.1  For pool heaters employing a continuous pilot light:

EFFY_HS=100(E_OUT/E_IN)

where:

E_OUT=as defined in 4.4.1 of this appendix

E_IN=as defined in 4.4.2 of this appendix

100=to convert a fraction to percent

4.4.3.2  For pool heaters without a continuous pilot light:

EFFY_HS=E_t

where:

E_t=as defined in 4.1 of this appendix.

[62 FR 26165, May 12, 1997]

Browse Previous |  Browse Next