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ASHRAE 137 09:2009 Edition

ASHRAE 137 09:2009 Edition

$29.25

ASHRAE Standard 137-2009 Methods of Testing for Efficiency of Space-Conditioning/Water-Heating Appliances that Include a Desuperheater Water Heater (ANSI/ASHRAE Approved)

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ASHRAE 2009 46
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4 1. PURPOSE
1. PURPOSE
1.1 This standard provides test methods and calculation procedures for establishing the efficiencies of space-conditioning/ water-heating appliances having refrigerant-to-water desuperheaters.
1.1 This standard provides test methods and calculation procedures for establishing the efficiencies of space-conditioning/ water-heating appliances having refrigerant-to-water desuperheaters.
1.2 The procedures may be used as a basis for establishing efficiency ratings for such equipment and for estimating annual energy consumption.
1.2 The procedures may be used as a basis for establishing efficiency ratings for such equipment and for estimating annual energy consumption.
2. SCOPE
2. SCOPE
3. DEFINITIONS
3. DEFINITIONS
5 4. NOMENCLATURE
4. NOMENCLATURE
9 5. CLASSIFICATIONS
5. CLASSIFICATIONS
6. REQUIREMENTS
6. REQUIREMENTS
6.1 Seasonal Energy Efficiency Ratio (SEER). The SEER of the combined appliance shall be determined from the tests and the calculation procedure described in ANSI/ASHRAE Standard 116, Methods of Testing for Rating Seasonal Efficiency of Unitary Air C…
6.1 Seasonal Energy Efficiency Ratio (SEER). The SEER of the combined appliance shall be determined from the tests and the calculation procedure described in ANSI/ASHRAE Standard 116, Methods of Testing for Rating Seasonal Efficiency of Unitary Air C…
6.2 Heating Seasonal Performance Factor (HSPF). The HSPF of the combined appliance shall be determined from the tests and the calculation procedure described in ANSI/ ASHRAE Standard 116,1 supplemented by the additional provisions of Sections 7 throu…
6.2 Heating Seasonal Performance Factor (HSPF). The HSPF of the combined appliance shall be determined from the tests and the calculation procedure described in ANSI/ ASHRAE Standard 116,1 supplemented by the additional provisions of Sections 7 throu…
6.3 Energy Factor (EF). The energy factor of the electric water heater shall be determined in accordance with ANSI/ ASHRAE Standard 118.2, Method of Testing for Rating Residental Water Heaters.2
6.3 Energy Factor (EF). The energy factor of the electric water heater shall be determined in accordance with ANSI/ ASHRAE Standard 118.2, Method of Testing for Rating Residental Water Heaters.2
6.4 Combined Space-Conditioning and Water-Heating Performance. For each season, the space-conditioning and water-heating performance of the combined appliance shall be determined using the calculations prescribed in Section 11.
6.4 Combined Space-Conditioning and Water-Heating Performance. For each season, the space-conditioning and water-heating performance of the combined appliance shall be determined using the calculations prescribed in Section 11.
7. INSTRUMENTATION SPECIFICATIONS
7. INSTRUMENTATION SPECIFICATIONS
7.1 Temperature Measurements
7.1 Temperature Measurements
TABLE 1 Component Assemblies Constituting a Combined Appliance
TABLE 1 Component Assemblies Constituting a Combined Appliance
7.2 Pressure Measurements
7.2 Pressure Measurements
7.3 Airflow Measurements
7.3 Airflow Measurements
7.4 Electrical Power, Energy, and Voltage Measurements
7.4 Electrical Power, Energy, and Voltage Measurements
10 7.5 Desuperheater Water Flow Rate. For active systems that are tested using Type A water-heating-mode tests, the water flow rate through the desuperheater shall be measured using a flowmeter. The flow rate measurement () shall be accurate to within
7.5 Desuperheater Water Flow Rate. For active systems that are tested using Type A water-heating-mode tests, the water flow rate through the desuperheater shall be measured using a flowmeter. The flow rate measurement () shall be accurate to within
7.6 Water Mass or Volume Measurements. During the simulated use test and Type B water-heating-mode tests, either the mass or volume of the water withdrawn from the water heater is measured. If a mass measurement is used, the scale shall be accurate t…
7.6 Water Mass or Volume Measurements. During the simulated use test and Type B water-heating-mode tests, either the mass or volume of the water withdrawn from the water heater is measured. If a mass measurement is used, the scale shall be accurate t…
7.7 Time Measurements. The elapsed time measurements shall be made using an instrument that is accurate to within ±0.3% of the reading.
7.7 Time Measurements. The elapsed time measurements shall be made using an instrument that is accurate to within ±0.3% of the reading.
8. APPARATUS
8. APPARATUS
8.1 Test Apparatus
8.1 Test Apparatus
11 8.2 Standard Components. If the manufacturer neither supplies nor specifies the heat pump (air conditioner), water heater, or water pump (if required), then components meeting the criteria listed below shall be used for testing.
8.2 Standard Components. If the manufacturer neither supplies nor specifies the heat pump (air conditioner), water heater, or water pump (if required), then components meeting the criteria listed below shall be used for testing.
Figure 1 Physical specifications required of the standard water heater.
Figure 1 Physical specifications required of the standard water heater.
12 8.3 Installation of the Appliance and Instrumentation
8.3 Installation of the Appliance and Instrumentation
Figure 2 Default installation requirements for field- installed desuperheaters: (a) passive systems and (b) insert systems.
Figure 2 Default installation requirements for field- installed desuperheaters: (a) passive systems and (b) insert systems.
14 Figure 3 Examples of acceptable instrumentation locations and piping arrangements for the water heater inlet and outlet.
Figure 3 Examples of acceptable instrumentation locations and piping arrangements for the water heater inlet and outlet.
15 Figure 3 (cont.) Examples of acceptable instrumentation locations and piping arrangements for the water heater inlet and outlet.
Figure 3 (cont.) Examples of acceptable instrumentation locations and piping arrangements for the water heater inlet and outlet.
16 Figure 4 Location of internal tank temperature sensors.
Figure 4 Location of internal tank temperature sensors.
Figure 5 Default water piping connections at the water heater: (a) fixed-flow active systems and (b) variable- flow active systems.
Figure 5 Default water piping connections at the water heater: (a) fixed-flow active systems and (b) variable- flow active systems.
18 Figure 6a Acceptable test setup for water-heating-mode tests conducted using the Type A water-heating-mode test method: water heater and desuperheater are not packaged.
Figure 6a Acceptable test setup for water-heating-mode tests conducted using the Type A water-heating-mode test method: water heater and desuperheater are not packaged.
Figure 6b Acceptable test setup for water-heating- mode tests conducted using the Type A water-heating- mode test method: water heater and desuperheater are packaged.
Figure 6b Acceptable test setup for water-heating- mode tests conducted using the Type A water-heating- mode test method: water heater and desuperheater are packaged.
8.4 Test Setup
8.4 Test Setup
19 9. METHODS OF TEST
9. METHODS OF TEST
9.1 Primary Test Methods
9.1 Primary Test Methods
20 9.2 Secondary Test Methods
9.2 Secondary Test Methods
21 10. TEST PROCEDURE
10. TEST PROCEDURE
10.1 General
10.1 General
22 10.2 Test Requirements and Test Conditions
10.2 Test Requirements and Test Conditions
TABLE 2a Summary of Laboratory Tests and Test Conditions Associated with the Space-Cooling Season
TABLE 2a Summary of Laboratory Tests and Test Conditions Associated with the Space-Cooling Season
TABLE 2b Summary of Laboratory Tests and Test Conditions Associated with the Space-Heating Season
TABLE 2b Summary of Laboratory Tests and Test Conditions Associated with the Space-Heating Season
23 10.3 Tests Tolerances and Energy Balance Requirements
10.3 Tests Tolerances and Energy Balance Requirements
10.4 Water Heater Volume Determination. The volume of the water heater, Vt , shall be determined either via a direct volume measurement or two mass measurements. If using the latter approach, the mass of the water heater shall be measured when empty …
10.4 Water Heater Volume Determination. The volume of the water heater, Vt , shall be determined either via a direct volume measurement or two mass measurements. If using the latter approach, the mass of the water heater shall be measured when empty …
10.5 Simulated Use Test
10.5 Simulated Use Test
TABLE 3a Test Tolerances for the Simulated Use Test
TABLE 3a Test Tolerances for the Simulated Use Test
24 TABLE 3b Test Tolerances for Type A Water-Heating-Mode Tests
TABLE 3b Test Tolerances for Type A Water-Heating-Mode Tests
TABLE 3c Test Tolerances for Type B Water-Heating-Mode Tests
TABLE 3c Test Tolerances for Type B Water-Heating-Mode Tests
27 10.6 Space-Conditioning-Only-Mode Tests. The space- conditioning-only tests shall be conducted with the desuperheater and water heater installed in accordance with Section 8.3 and filled with water. For active systems, the water pump shall be disable…
10.6 Space-Conditioning-Only-Mode Tests. The space- conditioning-only tests shall be conducted with the desuperheater and water heater installed in accordance with Section 8.3 and filled with water. For active systems, the water pump shall be disable…
10.7 Water-Heating-Mode Tests (COOL&WH and HEAT&WH). For water-heating-mode tests, space- conditioning capacity and electrical power shall be determined using the same test apparatus and, except for very few additions, the same test procedures as use…
10.7 Water-Heating-Mode Tests (COOL&WH and HEAT&WH). For water-heating-mode tests, space- conditioning capacity and electrical power shall be determined using the same test apparatus and, except for very few additions, the same test procedures as use…
29 TABLE 4 Suggested Initial Target Temperatures When Conducting Type B Water-Heating-Mode Tests
TABLE 4 Suggested Initial Target Temperatures When Conducting Type B Water-Heating-Mode Tests
31 11. CALCULATIONS
11. CALCULATIONS
11.1 Seasonal Energy Efficiency Ratio (SEER) of the Combined Appliance When Used Only for Space Cooling. The SEER of the combined appliance shall be calculated as described in ANSI/ASHRAE Standard 116.1 The space- cooling capacities and electrical po…
11.1 Seasonal Energy Efficiency Ratio (SEER) of the Combined Appliance When Used Only for Space Cooling. The SEER of the combined appliance shall be calculated as described in ANSI/ASHRAE Standard 116.1 The space- cooling capacities and electrical po…
11.2 Heating Seasonal Performance Factors (HSPF) of the Combined Appliance When Used Only for Space Heating. An HSPF of the combined appliance shall be calculated as described in ANSI/ASHRAE Standard 116.1 The space-heating capacities and electrical …
11.2 Heating Seasonal Performance Factors (HSPF) of the Combined Appliance When Used Only for Space Heating. An HSPF of the combined appliance shall be calculated as described in ANSI/ASHRAE Standard 116.1 The space-heating capacities and electrical …
11.3 Combined Performance Factor for the Space- Cooling and Water-Heating Season (CPFcs ). The combined performance factor for the space-cooling and water- heating season shall be calculated as follows:
11.3 Combined Performance Factor for the Space- Cooling and Water-Heating Season (CPFcs ). The combined performance factor for the space-cooling and water- heating season shall be calculated as follows:
32 TABLE 5 Fractional Bin Hours for the Space-Cooling and Water-Heating Seasonal Calculations
TABLE 5 Fractional Bin Hours for the Space-Cooling and Water-Heating Seasonal Calculations
TABLE 6 Standby Losses of an Electric Water Heater as a Function of Its Energy Factor
TABLE 6 Standby Losses of an Electric Water Heater as a Function of Its Energy Factor
33 11.4 Combined Performance Factor for the Space- Heating and Water-Heating Season (CPFhs). The combined performance factor for the space-heating and water- heating season shall be calculated as follows:
11.4 Combined Performance Factor for the Space- Heating and Water-Heating Season (CPFhs). The combined performance factor for the space-heating and water- heating season shall be calculated as follows:
34 Figure 7 Map of the generalized climatic regions.
Figure 7 Map of the generalized climatic regions.
TABLE 7 Fractional Bin Hours and Outdoor Design Temperatures, by Region, for the Space-Heating and Water-Heating Seasonal Calculations
TABLE 7 Fractional Bin Hours and Outdoor Design Temperatures, by Region, for the Space-Heating and Water-Heating Seasonal Calculations
37 11.5 Combined Performance Factor for the Water- Heating-Only Season (CPFws ). For all combined appliances that incorporate a desuperheater, the combined performance factor for the water-heating-only season equals the energy factor of the water heater…
11.5 Combined Performance Factor for the Water- Heating-Only Season (CPFws ). For all combined appliances that incorporate a desuperheater, the combined performance factor for the water-heating-only season equals the energy factor of the water heater…
12. REFERENCES
12. REFERENCES
A1. For the Space-Cooling and Water-Heating Season
A1. For the Space-Cooling and Water-Heating Season
38 TABLE A1 Seasonal Operating Hours for Each Climatic Region
TABLE A1 Seasonal Operating Hours for Each Climatic Region
A2. For the Space-Heating and Water-Heating Season
A2. For the Space-Heating and Water-Heating Season
A3. For the Water-Heating-Only Season
A3. For the Water-Heating-Only Season
39 A4. Annual Energy Consumption and Operating Cost
A4. Annual Energy Consumption and Operating Cost
B1. For the Space-Cooling and Water-Heating Season
B1. For the Space-Cooling and Water-Heating Season
B2. For the Space-Heating and Water-Heating Season
B2. For the Space-Heating and Water-Heating Season
40 B3. For the Water-Heating-Only Season
B3. For the Water-Heating-Only Season
B4. Annual Energy Consumption and Operating Cost
B4. Annual Energy Consumption and Operating Cost
C1. For the Space-Cooling and Water-Heating Season
C1. For the Space-Cooling and Water-Heating Season
C2. For the Space-Heating and Water-Heating Season
C2. For the Space-Heating and Water-Heating Season
C3. For the Water-Heating-Only Season
C3. For the Water-Heating-Only Season
C4. Annual Energy and Cost Credits
C4. Annual Energy and Cost Credits
41 D1. Limitations
D1. Limitations
D2. Equivalent Seasonal Energy Efficiency Ratio
D2. Equivalent Seasonal Energy Efficiency Ratio
D3. Equivalent Heating Seasonal Performance Factor
D3. Equivalent Heating Seasonal Performance Factor
D4. Equivalent Energy Factor
D4. Equivalent Energy Factor
D4.1 Heat Pump with Desuperheater Water Heater
D4.1 Heat Pump with Desuperheater Water Heater
42 D4.2 Air Conditioner with Desuperheater Water Heater
D4.2 Air Conditioner with Desuperheater Water Heater
E1. For the Space-Cooling and Water-Heating Season
E1. For the Space-Cooling and Water-Heating Season
43 E2. For the Space-Heating and Water-Heating Season
E2. For the Space-Heating and Water-Heating Season
E3. For the Water-Heating-Only Season
E3. For the Water-Heating-Only Season

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