1、 2005STANDARD for 4100 N. FAIRFAX DR., SUITE 200 z ARLINGTON, VIRGINIA 22203 PERFORMANCE RATING OF DIRECT GEOEXCHANGE HEAT PUMPS Standard 870 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without li
2、cense from IHS-,-,-Price $10.00 (M) $20.00 (NM) Copyright 2005, by Air-Conditioning and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office IMPORTANT SAFETY DISCLAIMER ARI does not set safety standards and does not certify or guarantee the safety of any pro
3、ducts, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements
4、 appropriate for products covered by this standard/guideline. ARI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. ARI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free
5、from risk. ARI CERTIFICATION PROGRAM PROVISIONS Scope of the Certification Program The certification program includes all factory made residential, commercial and industrial Direct Geoexchange Heat Pumps as defined in Section 3. It does not apply to the rating and testing of retrofit units. Certifie
6、d Ratings The following certification program ratings are verified by test at the Standard Rating Conditions: 1. Cooling Capacity, Btu/h 2. Energy Efficiency Ratio, EER, Btu/Wh3. Heating Capacity, Btu/h 4. Coefficient of Performance, COP Note: This standard supersedes ARI Standard 870-2001. Copyrigh
7、t Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope .1 Section 3. Definitions .1 Section 4. Classification .3 Sect
8、ion 5. Test and Rating Requirements.3 Section 6. Minimum Data Requirements for Published Ratings6 Section 7. Operating Requirements6 Section 8. Marking and Nameplate Data8 Section 9. Conformance Conditions.8 Check page numbers TABLES Table 1. Classification of Direct Geoexchange Heat Pumps.3 Table 2
9、. Minimum External Resistance 5 APPENDICES Appendix A. References - Normative.9 Appendix B. References - Informative .9 Appendix C. Outdoor Water Coil Method of Testing Direct Geoexchange Heat Pumps for Capacity - Informative.10 FIGURES FOR APPENDICES Figure C1. Outdoor Water Coil Test Set-Up for Di
10、rect Geoexchange Heat Pumps.10 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STANDARD 870-2005_ 1PERFORMANCE RATING OF DIRECT GEOEXCHANGE HEAT PUMPS SECTION 1. PURPO
11、SE 1.1 Purpose. The purpose of this standard is to establish for Direct Geoexchange Heat Pumps: definitions; classification; test and rating requirements; minimum data requirements for Published Ratings; operating requirements; marking and nameplate data; and conformance conditions. 1.1.1 Intent. Th
12、is standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. SECTION 2. SCOPE 2.1 Scope. This standard applies to factory made resi
13、dential, commercial and industrial Direct Geoexchange Heat Pumps, as defined in Section 3. 2.1.1 Energy Source. This standard applies only to electrically-driven, mechanical compression type systems. 2.1.2 Alternative Applications. Equipment designed for rating under this standard may not be suitabl
14、e for alternative applications covered in ISO 13256-1. 2.2 Exclusions. This standard applies to the rating and testing of complete refrigeration systems and does not apply to individual assemblies for separate use. SECTION 3. DEFINITIONS All terms in this document shall follow the standard industry
15、definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defined in this section. 3.1 Coefficient of Performance (COP). A ratio of the Cooling/Heating Capacity in watts W to the power input values in watts W at any given se
16、t of Rating Conditions expressed in watts/watt W/W. For heating COP, supplementary resistance heat shall be excluded. 3.1.1 Standard Coefficient of Performance. A ratio of the capacity to power input value obtained at Standard Rating Conditions. 3.2 Cooling Capacity. The capacity associated with the
17、 change in air enthalpy which includes both the Latent and Sensible Capacities expressed in Btu/h W. 3.2.1 Latent Capacity. Capacity associated with a change in humidity ratio. 3.2.2 Sensible Capacity. Capacity associated with a change in dry-bulb temperature. 3.3 Direct Geoexchange Heat Exchanger.
18、A continuous sealed underground closed loop heat exchanger with one refrigerant supply tube and one refrigerant return tube. More than one such Direct Geoexchange Heat Exchanger may be supplied with each heat pump and the Direct Geoexchange Heat Exchanger(s) may be factory or field assembled. Copyri
19、ght Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ ARI STANDARD 870-2005 23.4 Direct Geoexchange Heat Pump. A heat pump consisting of one or more factory made assemblies which no
20、rmally include an indoor conditioning coil with air moving means, compressor(s) and refrigerant-to-earth heat exchanger(s), including means to provide a heating function or a cooling function or both. The separate assemblies shall be designed to be used together, and the requirements of rating outli
21、ned in the standard are based upon the use of matched assemblies. 3.4.1 Functions. Direct Geoexchange Heat Pumps shall provide the function of air-circulating, cooling and heating with controlled temperature, and may include the functions of water heating, air-cleaning, dehumidifying or humidifying.
22、 Models designated as “cooling only“ units need not include the heating function, and models designated as “heating only“ units need not include the cooling function. 3.5 Energy Efficiency Ratio (EER). A ratio of the Cooling Capacity in Btu/h to the power input values in watts at any given set of Ra
23、ting Conditions expressed in Btu/(Wh). 3.5.1 Standard Energy Efficiency Ratio. A ratio of the capacity to power input value obtained at Standard Rating Conditions. 3.6 Heating Capacity. The capacity associated with the change in dry-bulb temperature expressed in Btu/h W. 3.7 Part-Load Rating. A rati
24、ng based on tests performed at Part-Load Rating Conditions. 3.8 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a unit may be chosen to fit its application. These values apply to all units of like nominal size and ty
25、pe (identification) produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the heat pump or published in specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.8.1 Applicatio
26、n Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.8.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.9 Rating Conditions. Any set of operating conditions under which a single level of performan
27、ce results and which causes only that level of performance to occur. 3.9.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison of performance characteristics. 3.10 “Shall“ or “Should“. “Shall“ or “should“ shall be interpreted as follows: 3.10.1 Shall. Where “shall“ or “shal
28、l not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.10.2 Should. “Should“ is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.11 Standard Air. Air weighing 0.075 lb/ft31.2 kg/m3 which appro
29、ximates dry air at 70F 21C and at a barometric pressure of 29.92 in Hg 101.3 kPa. 3.12 Test Fluid. The liquid filling the test water coil. Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without licen
30、se from IHS-,-,-ARI STANDARD 870-2005_ 3 SECTION 4. CLASSIFICATION 4.1 Classification. Direct Geoexchange Heat Pumps within the scope of this standard shall be classified as shown in Table 1. Table 1. Classification of Direct Geoexchange Heat Pumps ARI Type Designation Heating and Cooling Heating On
31、ly Cooling Only Arrangement* FAN COMP Split System HRCU-DGX-CB HORCU-DGX-CB HCRCU-DGX-CB EVAP COND COMP Split System w/ No Indoor Fan HRCU-DGX-C HORCU-DGX-C HCRCU-DGX-C EVAP COND *Denotes cooling mode function. SECTION 5. TEST AND RATING REQUIREMENTS 5.1 Standard Rating. Standard Ratings shall be es
32、tablished at the Standard Rating Conditions specified in 5.1.3. All Standard Ratings shall be verified by tests conducted in accordance with ASHRAE Standard 37, and with the test methods and procedures as described in this standard except that the total Cooling and Heating Capacity shall be the aver
33、age of the air enthalpy method and the water coil method. Standard Ratings of units which do not have indoor air-circulating fans furnished as part of the model, i.e., split system with indoor coil alone (Table 1), shall be established by subtracting from the total Cooling Capacity 1,250 Btu/h/1,000
34、 ft3/min 0.776 kW per m3/s, and by adding the same amount to the Heating Capacity. Total power input for both heating and cooling shall be increased by 365 W/1,000 ft3/min 0.776 kW per m3/s of indoor air handled. 5.1.1 Values of Standard Capacity Ratings. These ratings shall be expressed only in ter
35、ms of Btu/h W in multiples of 100 30. 5.1.1.1 Standard Ratings relating to Cooling or Heating Capacities shall be net values, including the effects of circulating-fan heat, but not including supplementary heat.5.1.2 Values of Standard Energy Efficiency Ratio or Coefficients of Performance. Standard
36、Energy Efficiency Ratios for cooling, whenever published, shall be expressed in multiples of the nearest 0.1 Btu/(Wh) the nearest cooling COP in multiples of 0.1; Standard Coefficients of Performance for heating, whenever published, shall be expressed in multiples of the nearest 0.1. 5.1.2.1 In the
37、determination of values of Standard Energy Efficiency Ratio or Coefficient of Performance, the power inputs to the compressor(s) and fan(s), plus controls and other items included as part of the model number(s) shall be used.5.1.3 Standard Rating Conditions. The test conditions for Standard Ratings
38、shall include the following: 5.1.3.1 Test Fluid. The liquid used in the test water coil shall be water which has been freeze-protected with the addition of 15% methanol, by weight 5.1.3.2 Standard Rating Conditions. a. Cooling (not required for heating only models). Air temperature entering indoor p
39、ortion of unit: 80.0F 26.7C dry-bulb, 67.0F 19.4C wet-bulb Air temperature surrounding unit: 80.0F 26.7C dry-bulb Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STAND
40、ARD 870-2005_ 4Refrigerant temperature from test water coil (liquid line): 77.0F 25.0C b. Heating (not required for cooling only models). Air temperature entering indoor portion of unit: 70.0F 21.1C dry-bulb, 60.0F 15.6C wet-bulb. Air temperature surrounding unit: 70.0F 21.1C dry-bulb Refrigerant te
41、mperature from test water coil (vapor line) 32.0F 0C 5.1.3.3 Electrical Conditions. Standard Rating tests shall be performed at the nameplate rated voltage(s) and frequency. For heat pumps with dual nameplate voltage ratings, Standard Rating tests shall be performed at both voltages, or at the lower
42、 of the two voltages, if only a single Standard Rating is to be published. 5.1.3.4 Indoor-Side Air Quantity. All Standard Ratings shall be determined at an indoor-side air quantity, delivered against at least the minimum external resistance required by 5.1.3.6. All air quantities shall be expressed
43、as ft3/min m3/s of Standard Air. a. Direct Geoexchange Heat Pumps shall be rated at the indoor-side air quantity delivered when operating against the minimum external resistance specified in 5.1.3.6 or at a lower indoor-side air quantity, if so specified by the manufacturer. b. Heat pumps which do n
44、ot incorporate an indoor fan, but are rated in combination with a device employing a fan shall be rated as described under a. above. For heat pumps of this class which are rated for general use to be applied to a variety of heating plants, the indoor-side air quantity shall be as specified by the ma
45、nufacturer in his Standard Ratings, or the air quantity obtained through the indoor coil assembly when the pressure drop across the indoor coil assembly and the recommended enclosures and attachment means is not greater than 0.30 in H2O 75 Pa, whichever is less. Indoor-side air quantities as referre
46、d to herein apply to the air quantity experienced when the unit is cooling and dehumidifying under the Standard Rating Cooling Conditions specified in this section. Heating-only units shall use the air quantity experienced when the unit is operating under the Standard Rating Conditions. This air qua
47、ntity shall be employed in all other tests prescribed herein without regard to resulting external static pressure, or if so specified by the manufacturer, the air quantity employed in all of the tests shall be that achieved at the external resistance employed in the Standard Rating cooling test. 5.1
48、.3.5 Requirements for Separated Assemblies. All Standard Ratings for heat pumps in which the compressor section is separated from the indoor section, as in Type HRCU (Table 1), shall be determined with at least 25.0 ft 7.62 m of interconnecting tubing on each line, of the size recommended by the manufacturer.
