1、 2016 Standard for Performance Rating of Direct Geoexchange Heat Pumps AHRI Standard 870 (I-P) - 2016 Price $10.00 (M) $20.00 (NM) Copyright 2016, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office IMPORTANT SAFETY DISCLAI
2、MER AHRI does not set safety standards and does not certify or guarantee the safety of any products, 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, installe
3、d and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI does not certify or
4、guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This standard supersedes ANSI/AHRI Standard 870-2005 with Addendum 1. For SI ratings, see AHRI Standard 871 (SI) -2016. AHRI CERTIFICATION PROGRAM PROVISIONS Scope of the Certification Pr
5、ogram 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. Certified Ratings The following ratings are verified by test at the Standard Rating C
6、onditions: 1. Full load Cooling Capacity, Btu/h 2. Full load Heating Capacity, Btu/h 3. Energy Efficiency Ratio, EER, Btu/(Wh) 4. Coefficient of Performance, COP (W/W) 5. Part-load Cooling Capacity (if applicable), Btu/h 6. Part-load Heating Capacity (if applicable), Btu/h 7. Part-load Energy Effici
7、ency Ratio (if applicable), EER, Btu/(Wh) 8. Part-load Coefficient of Performance (if applicable), COP (W/W) TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions . 1 Section 4. Classification . 3 Section 5. Test Requirements . 4 Section 6 Rating Requirement
8、s . 4 Section 7. Minimum Data Requirements for Published Ratings 5 Section 8. Operating Requirements 6 Section 9. Marking and Nameplate Data . 6 Section 10. Conformance Conditions. 6 TABLES Table 1. Classification of Direct Geoexchange Heat Pumps . 3 Table 2. Capacity Rating Multiples . 4 Table 3. S
9、tandard Rating Conditions 5 APPENDICES Appendix A. References Normative 7 Appendix B. References Informative 7 AHRI STANDARD 870 (I-P)-2016 1 PERFORMANCE RATING OF DIRECT GEOEXCHANGE HEAT PUMPS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Direct Geoexchange Heat P
10、umps: definitions; classification; test and rating requirements; minimum data requirements for Published Ratings; operating requirements; marking and nameplate data; and conformance conditions. For the remainder of this standard, the terms “heat pump” or “equipment” are also used to designate Direct
11、 Geoexchange Heat Pumps. 1.1.1 Intent. This 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. T
12、his standard applies to factory made residential, commercial and industrial Direct Geoexchange Heat Pumps as defined in Section 3, and within the capacity range of 18,000 Btu/h through 180,000 Btu/h. 2.1.1 Energy Source. This standard applies only to electrically-driven, mechanical vapor-compression
13、 refrigeration systems. 2.1.2 Alternative Applications. Equipment designed for rating under this standard is not suitable for alternative applications covered in ANSI/AHRI/ASHRAE ISO Standards 13256-1 and 13256-2. 2.1.3 Exclusions. This standard applies to the rating and testing of complete refriger
14、ation systems and does not apply to individual system components for separate use. Section 3. Definitions All terms in this document will follow the standard industry definitions in the ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) unless
15、 otherwise defined in this section. 3.1 Coefficient of Performance (COP). The ratio of Cooling/Heating Capacity in watts to the power input values in watts at any given set of Rating Conditions expressed in watts/watt. For heating COP, supplementary resistance heat shall be excluded.3.2 Cooling Capa
16、city. The capacity associated with the change in air enthalpy which includes both the latent and sensible capacities expressed in Btu/h. 3.3 Direct Geoexchange Heat Exchanger. A continuous sealed tube(s) heat exchanger with refrigerant supply and refrigerant return. This may be comprised of several
17、tubes and may be supplied with each heat pump. The heat exchanger(s) may be factory or field assembled. 3.4 Direct Geoexchange Heat Pump (DGX). A heat pump consisting of (1) one or more factory made assemblies which normally include an indoor conditioning coil with air or water moving means, (2) com
18、pressor(s), and (3) a subsurface refrigerant piping loop system functioning as a Direct Geoexchange Heat Exchanger, and may include means to provide a heating function, or a cooling function, or both. The separate system components shall be designed for use together. Models designated as “cooling on
19、ly” need not include the heating function and models designated “heating only” need not include the cooling function. The four types of Direct Geoexchange Heat Pumps within the scope of this standard are as follows. 3.4.1 DGX-to-Air Split System (Type 1). Compressor and indoor coil are in separate c
20、abinets. Indoor coil is with or without a fan. AHRI STANDARD 870 (I-P)-2016 2 3.4.2 DGX-to-Air Packaged System (Type 2). Compressor and indoor coil are in one cabinet, with or without a fan. 3.4.3 DGX-to-Water Split System (Type 3). Compressor and Indoor water-to-refrigerant heat exchanger are in se
21、parate cabinets. Indoor water-to-refrigerant heat exchanger is with or without a pump. 3.4.4 DGX-to-Water Packaged System (Type 4). Compressor and indoor water-to-refrigerant heat exchanger are in one cabinet. Indoor heat exchanger is with or without a pump. Note: ANSI/ASHRAE Standard 194 uses the t
22、erm Direct-expansion Ground Source Heat Pump in lieu of Direct Geoexchange Heat Pump. 3.5 Effective Power Input. The average electrical power input in watts, supplied to the equipment within a defined interval of time. This is the sum of the following, as appropriate: 3.5.1 The power input for the o
23、peration of the compressor, excluding supplemental electric heat, W 3.5.2 The power input of all control and safety devices of the equipment, W 3.5.3 The proportional power input of the conveying devices for the transport of heat transfer media through the heat pump only (e.g., fans, pumps, whether
24、internal or external, whether provided with heat pump or not), W 3.6 Energy Efficiency Ratio (EER). The ratio of the Cooling Capacity in Btu/h, to the Effective Power Input in watts, at any given set of Rating Conditions, Btu/(Wh). 3.7 Heating Capacity. For DGX-to-Air systems, the rate at which the
25、equipment adds heat to the air passing through the indoor coil under specified conditions of operation, including the fan power adjustment. For DGX-to-Water systems, the rate at which the equipment adds heat to the Indoor Water passing through the indoor heat exchanger under specified conditions of
26、operation, including the pump power adjustment, Btu/h. 3.8 Indoor Water. The liquid used in the indoor side water-to-refrigerant heat exchanger. This is not the same working fluid as the Test Liquid. 3.9 Published Rating. A statement of the assigned values of those performance characteristics, under
27、 stated Rating Conditions, by which a heat pump may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the heat p
28、ump or published in its specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.9.1 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.9.2 Part-load Rating. A rating
29、based on tests performed at part-load Rating Conditions. 3.9.3 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.10 Rating Conditions. Any set of Rating Conditions under which a single level of performance results and which causes only that level of performance to o
30、ccur. 3.10.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics as listed in Table 3. 3.11 “Shall” or “Should”. “Shall” or “Should” shall be interpreted as follows: 3.11.1 Shall. Where “Shall” or “Shall not” is used for a provision specified
31、, that provision is mandatory if compliance with the standard is claimed. AHRI STANDARD 870 (I-P)-2016 3 3.11.2 Should. “Should” is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.12 Test Liquid. An antifreeze mixture used in the refrigerant-to-test li
32、quid heat exchanger (ground loop simulator) consisting of water and 15% methanol, by mass. Section 4. Classification 4.1 Classification. Direct Geoexchange Heat Pumps (DGX) within the scope of this standard shall be classified as shown in Table 1. Table 1. Classification of Direct Geoexchange Heat P
33、umps Designation AHRI Type3 Arrangement1 Heating & Cooling Heating Only Cooling Only DGX-to-Air Split System (Type 1) with Indoor Fan HRCU-DGX-CB HORCU-DGX-CB HCRCU-DGX-CB FAN HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Air Split System (Type 1) without Indoor Fan HRCU-DGX-C HORCU-DGX-C HCRCU-DGX-C HE
34、AT2 COMP INDOOR COIL GROUND LOOP DGX-to-Air Packaged System (Type 2) with Indoor Fan HSP-DGX-CB HOSP-DGX-CB HCSP-DGX-CB FAN HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Air Packaged System (Type 2) without Indoor Fan HSP-DGX-C HOSP-DGX-C HCSP-DGX-C HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Water Split
35、System (Type 3) with Circulating Pump HRCU-DGX-CWP HORCU-DGX-CWP HCRCU-DGX-CWP CIRC PUMP HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Split System (Type 3) without Circulating Pump HRCU-DGX-CW HORCU-DGX-CW HCRCU-DGX-CW HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Packaged System (Type 4) with Circ
36、ulating Pump HSP-DGX-CWP HOSP-DGX-CWP HCSP-DGX-CWP CIRC PUMP HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Packaged System (Type 4) without Circulating Pump HSP-DGX-CW HOSP-DGX-CW HCSP-DGX-CW HEAT2 COMP INDOOR HX GROUND LOOP Notes: 1. Arrangement denotes Heating & Cooling and Heating Only mode funct
37、ions. Separated enclosures indicate a remote condensing unit (RCU) and adjoining enclosures indicate a single package (SP). 2. “HEAT” denotes supplemental heating options such as electric resistance heat. 3. For AHRI Types XXXX-YYY-ZZZ, XXXX is Segment 1, YYY is Segment 2, and ZZZ is Segment 3. Lege
38、nd First Segment: H = Heat Pump (Heating and Cooling, unless followed by an “O” or “C”) O = Heating Only C = Cooling Only R = Remote CU = Condensing Unit SP = Single Package Second Segment: DGX = Direct Geoexchange System Third Segment: C = Outdoor Coil (Ground Loop) B = Indoor Fan W = Indoor Water
39、Heat Exchanger P = Indoor Circulating Pump AHRI STANDARD 870 (I-P)-2016 4 Section 5. Test Requirements 5.1 Test Methods. All tests shall be conducted in accordance with ANSI/ASHRAE Standard 194. Section 6. Rating Requirements 6.1 Standard Rating. Standard Ratings shall be established at the Standard
40、 Rating Conditions specified in Section 6.1.3 using test procedures described in ANSI/ASHRAE Standard 194. Standard Ratings relating to Cooling and Heating Capacities shall be net values, including the effects of circulating fan and circulating pump heat, but not including supplementary heat. Standa
41、rd efficiency ratings shall be based on Effective Power Input as defined in Section 3.6. 6.1.1 Values of Standard Capacity Ratings. Capcaity ratings shall be expressed only in terms of Btu/h in multiples shown in Table 2. Table 2. Capacity Rating Multiples Capacity Ratings, Btu/h Multiples, Btu/h an
42、d 200 and 500 65,000 and 135,000 1,000 135,000 and 180,000 2,000 6.1.2 Values of Standard Energy Efficiency Ratio or Coefficients of Performance. Standard Energy Efficiency Ratios for cooling, whenever published, shall be expressed in multiples of the nearest 0.1 Btu/(Wh). Standard Coefficients of P
43、erformance for heating, whenever published, shall be expressed in multiples of the nearest 0.1 Btu/(Wh). 6.1.3 Standard Rating Conditions. Equipment with dual rated frequencies shall be tested at each frequency. The test conditions for Standard Ratings shall include the following. 6.1.3.1 Standard R
44、ating Conditions. Standard Rating Conditions for all types are described in Table 3. For each test, the heat pump shall be operated and readings taken in accordance with ANSI/ASHRAE Standard 194. 6.1.3.2 Electrical Conditions. Standard rating tests shall be performaned at the nameplate rated voltage
45、 and frequency. AHRI STANDARD 870 (I-P)-2016 5 Table 3. Standard Rating Conditions Equipment Classification Rating Conditions Operating Mode Entering Air Temperature dry bulb/wet bulb,F Entering Water Temperature, F Surrounding Air Temperature,F Saturated Refrigerant Temperature,F1 (Evaporating) (Co
46、ndensing) DGX-to-Air (Types 1 &2) Standard Heat 68.0/59.0 N/A 68.0 32.0 (Evap) Cool 80.6/66.2 N/A 80.6 77.0 (Cond) Part-load Heat 68.0/59.0 N/A 68.0 41.0 (Evap) Cool 80.6/66.2 N/A 80.6 68.0 (Cond) DGX-to-Water (Types 3 &4) Standard Heat N/A 104.0 59.0-86.0 32.0 (Evap) Cool N/A 53.6 59.0-86.0 77.0 (C
47、ond) Part-load Heat N/A 104.0 59.0-86.0 41.0 (Evap) Cool N/A 53.6 59.0-86.0 68.0 (Cond) Note: 1. Refrigerant pressure and temperature are measured at the inlet to the heat pump being tested. Increasing superheat will increase the equipment entering refrigerant temperature and increasing sub-cooling
48、will decrease the equipment leaving refrigerant temperature. 6.2 Part-load Rating. Heat pumps which are capable of capacity control shall be rated at each step of capacity reductionprovided by the heat pump and allowed by the controls. 6.2.1 Part-load Rating Conditions. The conditions of test for Pa
49、rt-load Ratings are the same as for the Standard Ratings in Section 6.1 except for the values listed in Table 3. 6.2.1.1 Capacity Reduction Means May be Adjusted to Obtain the Specified Step of Unloading. No manual adjustment of indoor air quantities or water flow rates from those of Standard Rating Conditions shall be made. Automatic adjustment of the quantities by system function is permissible provided it is by means of a control system which is an integral part of the equipment
